CN1180540C - Input device for handheld information processing device - Google Patents
Input device for handheld information processing device Download PDFInfo
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- CN1180540C CN1180540C CNB011357150A CN01135715A CN1180540C CN 1180540 C CN1180540 C CN 1180540C CN B011357150 A CNB011357150 A CN B011357150A CN 01135715 A CN01135715 A CN 01135715A CN 1180540 C CN1180540 C CN 1180540C
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Abstract
An input device suitable for a handheld information processing device, such as a portable keyboard, includes a keyboard controller, a transmission connection port, a main connection port, a path selection unit, a synchronization button, and a combinational logic circuit. The portable keyboard is correspondingly connected to the handheld information processing device through the main connecting port, the path selection unit is controlled by a selection signal, and when the selection signal is at a first logic level, the path selection unit enables keyboard data to be transmitted to the handheld information processing device through the main connecting port. When the selection signal is at the second logic level, the hand-held information processing apparatus transmits the transmission data to the transmission connection port through the main connection port. The synchronization button is used for switching between a first logic level and a second logic level, and the combinational logic circuit is used for generating a selection signal.
Description
Technical field
The present invention relates to hand-held data processor, mean a kind of Portable keyboard that is applicable to handheld information processor especially, can be from the synchronous transmission function keyboard entry function that automaticallyes switch back.
Background technology
In the modern society that information alternates fast, in conjunction with the hand held of computer, communication, consumer electronics technology or Espresso, personal digital assistant (Personal Digital Assistant, hereinafter to be referred as PDA) etc. hand-held data processor, advantages such as (thin such as business card, memorandum, routing) is subjected to consumer's favor widely because volume is light and handy, be easy to carry about with one, can store personal data.Traditionally, the user can be installed in a transmission base (cradle) 110 and be connected to desktop computer 150 or mobile computer by transmission cable 120 synchronously with the hand-held data processor 100 of this class of PDA at office or family, shown in Figure 1A, make and to carry out the operation of data backup and data synchronization updating between hand-held data processor 100 and the computer 150.On the other hand,, easily handle a large amount of Word messages,, hand-held data processor 100 is connected to traditional Portable keyboard 130 to reach the purpose with key in data with reference to Figure 1B in order to import data fast again exactly.
The attractive part of hand-held data processor is its light and handy portable characteristic, yet, prior art makes that but the user must be with synchronous transmission base and Portable keyboard, can carry out data synchronization updating whenever and wherever possible and use key in data, so, not only reduce the lightness of hand-held data processor, also reduce consumer's use wish.In view of this, the present invention proposes a kind of Portable keyboard that is applicable to handheld information processor, to overcome the restriction of prior art.
Summary of the invention
An object of the present invention is to provide a kind of Portable keyboard that is applicable to handheld information processor, with the function of keyboard input and synchronous transmission.
Another object of the present invention provides a kind of Portable keyboard that is applicable to handheld information processor, can be after the data sync end of transmission, and keyboard entry function automaticallyes switch back.
For reaching above-mentioned purpose, the invention provides a kind of input unit that is used for handheld information processor, optionally connect this handheld information processor to a computer, this input unit comprises: a main connectivity port, and can be in order to connect this handheld information processor; A transmission connectivity port can be in order to connect this computer; An input unit controller can be in order to handle the input signal of user's pressing keys; A path selection unit, be connected between this main connectivity port, this transmission connectivity port and this input unit controller, optionally between this main connectivity port and this transmission connectivity port, form one first transmission path, or between this main connectivity port and this input unit controller, form one second transmission path; And user's choice device, optionally export one first logic level and one second logic level; Wherein, when user's choice device is exported this first logic level, this second transmission path of this path selection unit conducting, so that send the handled input signal of this input unit controller to this handheld information processor, when user's choice device is exported this second logic level, this first transmission path of this path selection unit conducting then is so that transmit data between this handheld information processor and this computer.
For reaching above-mentioned purpose, the invention provides a kind of Portable keyboard, be applicable to handheld information processor, Portable keyboard according to the present invention comprises a keyboard controller, a transmission connectivity port, a main connectivity port, a path selection unit, a lockage button and a combinational logic circuit.Wherein, keyboard controller has a keyboard data and transmits holding wire and a Keyboard Control holding wire, and the transmission connectivity port has a data transfer signals line and a data device ready holding wire at least.Main connectivity port comprises a data received signal line, a main control signal line and a data terminal ready holding wire, and the Portable keyboard is connected to handheld information processor accordingly via main connectivity port.Path selection unit is selected signal in order to response, and when selecting signal in first logic level, keyboard data transmits holding wire and is couple to the data reception signal line, and the Keyboard Control holding wire is couple to main control signal, and makes this data terminal ready line suspension joint; When selecting signal in second logic level, the data transfer signals line is couple to the data reception signal line, and the data set ready line is couple to the data terminal ready line, and makes main control signal line suspension joint.The lockage button of first logic level and second logic level is provided, has second output and first output is couple to the main control signal line.Also have, in order to produce the combinational logic circuit of logical signal, an input of combinational logic circuit is couple to data set ready, another input of combinational logic circuit then is couple to second output of lockage button, wherein, when being first logic level except the signal at the signal of second output of lockage button and data set ready line, the selection signal that combinational logic circuit produces is second logic level.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing preferred embodiment is described in detail, wherein each accompanying drawing is:
Figure 1A is hand-held data processor carries out data sync in conjunction with traditional synchronous transmission base and computer a schematic diagram;
Figure 1B is that hand-held data processor connects the schematic diagram of traditional Portable keyboard in order to the input data;
Fig. 2 is a schematic diagram according to a preferred embodiment of the invention;
Fig. 3 A is according to the calcspar from the key in data to the hand-held data processor of the present invention;
Fig. 3 B is according to the calcspar during from hand-held data processor and computer synchrodata of the present invention.
Label declaration in the accompanying drawing
100～hand-held data processor; 110～synchronous transmission base; 120～transmission cable; 130～traditional Portable keyboard; 150～computer; 200～Portable keyboard of the present invention; 210～sequence transmission connectivity port; 212～sequence data transmits holding wire (PC_TXD); 214～data set ready line (PC_DSR); 220～main connectivity port; 222～sequence data received signal line (PDA_RXD); 224～main control signal line (PDA_GPI1); 226～data terminal ready line (PDA_DTR); 230～lockage button; The 3rd end of 232～lockage button; Second output of 234～lockage button; First output of 236～lockage button; 240～keyboard controller; 242～keyboard data transmits holding wire; 244～Keyboard Control holding wire; 250～path selection unit; 252～analog switch; 254～analog switch; 256～analog switch; 260～combinational logic circuit; The output of 262～combinational logic circuit; An input of 264～combinational logic circuit; Another input of 266～combinational logic circuit; 270～resistance R; Vcc～power supply.
Embodiment
Because the hand-held data processor of this class of PDA connects keyboard to carry out the data input or carry out synchronous transmission with computer no matter be, it all is the mode of utilizing sequence transmission, therefore the present invention with the function synthesized of keyboard input and synchronous transmission in a Portable keyboard, as shown in Figure 2, according to the present invention, Portable keyboard 200 has a main connectivity port 220 and a sequence transmission connectivity port 210, Portable keyboard 200 is connected to hand-held data processor 100 by main connectivity port 220, and is connected to computer 150 by sequence transmission connectivity port 210 and transmission cable 120.Sequence transmission Port 210 is preferable with the RS-232 connectivity port according to RS-232 non-synchronous transmissions standard.The user can import data with Portable keyboard 200 at ordinary times, and Portable keyboard 200 also comprises a lockage button 230, when the user wants that hand-held data processing device 100 and computer 150 carried out data synchronization updating, press lockage button 230, Portable keyboard 200 switches to the data sync transfer function, and after data synchronization updating finishes, Portable keyboard 200 keyboard entry function that automaticallyes switch back.That is this Portable keyboard 200 comprises: (a) main connectivity port 220, and can be in order to connect this handheld information processor 100; (b) transmission connectivity port 210 can be in order to connect outer computer 150; (c) keyboard controller 240 (input unit controller) can be in order to handle the input signal of user's pressing keys; (d) path selection unit 250, are connected between this main connectivity port 220, keyboard controller 240, this transmission connectivity port 210 threes; Path selection unit 250 optionally forms the first transmission path P in this main connectivity port 220 and this 210 of transmission Port
1, or at this main Port and 240 formation of keyboard controller, the second transmission path P
2(d) user's choice device 230, optionally export first logic level and second logic level.When user's choice device is exported this first logic level, this this second transmission path of path selection unit 250 conductings P
2, when user's choice device is exported this second logic level, this this first transmission path of path selection unit 250 conductings P then
1And this first transmission path P
1Comprise the control signal path, this handheld information processor 100 can utilize this control signal path, transmits a control signal to control the time that this second logic level continues; Can guarantee after the data synchronization updating EO Portable keyboard 200 meetings automatic switchover the back keyboard entry function like this.
Fig. 3 A is the detailed block schematic diagram of Portable keyboard 200.Keyboard controller 240 is the controllers that keyboard entry function is provided, and comprises that a keyboard data transmits (KB_TXD) holding wire 242 and a key is controlled (KB_GPI1) holding wire 244 thoroughly.Sequence transmission connectivity port 210 comprises that a sequence data transmits (PC_TXD) holding wire 212 and a data device ready (PC_DSR) holding wire 214, sequence transmission connectivity port 210 is preferable with the RS-232 connectivity port of abiding by according to RS-232 non-synchronous transmissions standard, and Portable keyboard 200 is connected to the computer 150 of an outside via sequence transmission connectivity port 210.On the other hand, Portable keyboard 200 is connected to handheld information processor 100 accordingly via main connectivity port 220, and main connectivity port 220 comprises that sequence data receives (PDA_RXD) holding wire 222, master control (PDA_GPI1) holding wire 224 and a data terminal ready (PDA_DTR) holding wire 226.Path selection unit 250 has the analog switch (analog switch) 252～256 of three groups of Data Control, is controlled by one and selects signal SEL.The X of analog switch 252
0End and X
1End is couple to KB_TXD signal 242 lines and PC_TXD holding wire 212 respectively, and the A end of analog switch 252 then is couple to PDA_RXD holding wire 222.The Y of analog switch 254
0End is couple to KB_GPI1 holding wire 244, and the B end of analog switch 254 then is couple to PDA_GPI1 holding wire 224.The Z of analog switch 256
1End is couple to PC_DSR holding wire 214, and the C end of analog switch 256 then is couple to PDA_DTR holding wire 226.
When selecting signal SEL to be logical zero, path selection unit 250 forms the second transmission path P in this main connectivity port 220 and 240 of keyboard controller
2, A, B, C end are connected respectively to X
0, Y
0, Z
0End, make KB_TXD holding wire 242 be couple to PDA_RXD holding wire 222, KB_GPI1 holding wire 244 is couple to PDA_GPI1 holding wire 224, and make PDA_DTR holding wire 226 suspension joints (Floating), like this, keyboard controller 240 can send keyboard signal to be connected to main connectivity port 220 hand-held data processor 100 by KB_TXD holding wire 242 via PDA_RXD holding wire 222, and sends the Keyboard Control signal to hand-held data processor 100 by KB_GPI1 holding wire 244 via PDA_GPI1 holding wire 224.
When selecting signal SEL to be logical one, path selection unit 250 forms the first transmission path P between this main Port 220 and this transmission connectivity port 210
1, A, B, C end are connected respectively to X
1, Y
1, Z
1End, make PC_TXD holding wire 212 be couple to PDA_RXD holding wire 222, PC_DSR holding wire 214 is couple to PDA_DTR holding wire 226, and make PDA_GPI1 holding wire 224 suspension joints, like this, hand-held data processor 100 can receive the data that the outer computer 150 that is connected to sequence transmission connectivity port 210 is transmitted by PC_TXD holding wire 212 by PDA_RXD holding wire 222, and sends data terminal ready to outer computer 150 by PDA_DTR holding wire 226 via PC_DSR holding wire 214.
Data synchronization updating operation between hand-held data processor 100 and the computer 150 is described in detail as follows:
(a) user is by after depressing lockage button 230, make and to produce a logic high potential pulse on the PDA_GPI1 holding wire 224 couple first output 236, enter the data sync transfer mode to trigger handheld information processor 100, handheld information processor 100 makes its output PDA_DTR holding wire 226 rise to the high potential logical one.Similarly, can make also combinational logic circuit 260 output logic high potential pulses give and select signal SEL, and PC_TXD holding wire 212 is couple to PDA_RXD holding wire 222 that PC_DSR holding wire 214 is couple to PDA_DTR holding wire 226.
(b) user is by after depressing and decontrol lockage button 230, the high potential logical one that utilizes 226 feedbacks of PDA_DTR holding wire is to combinational logic circuit 260, make and select signal SEL to continue to maintain the high potential logical one, to continue the first transmission path P between conducting master connectivity port 220 and the transmission connectivity port 210
1That is, when handheld information processor 100 carries out the data sync transmission via main connectivity port 220 and sequence transmission connectivity port 210, handheld information processor 100 changes the signal of PDA_DTR holding wire 226 into logical one by logical zero, make the signal on the PC_DSR holding wire 214 that is couple to PDA_DTR holding wire 226 remain on logical one, and cause the selection signal SEL of combinational logic circuit 260 outputs also to maintain logical one.
(c) when these handheld information processor 100 end data synchronous drivings are operated, handheld information processor 100 changes the signal of PDA_DTR holding wire 226 into logical zero by logical one, make the signal on the PC_DSR holding wire 214 that is couple to PDA_DTR holding wire 226 reply logical zero, and cause the selection signal SEL of combinational logic circuit 260 outputs also to change logical zero into, also make A, the B of path selection unit 250, C end be connected to X
0, Y
0, Z
0End is like this to form the second transmission path P of 240 of main connectivity port 220 and keyboard controller
2KB_TXD holding wire 242 is couple to PDA_RXD holding wire 222, and KB_GPI1 holding wire 244 is couple to PDA_GPI1 holding wire 224, and makes PDA_DTR holding wire 226 suspension joints, and so, Portable keyboard 200 automatically restores to keyboard entry function.
Comprehensive the above, the present invention discloses a kind of Portable keyboard that is applicable to handheld information processor, with the function of keyboard input and synchronous transmission, can be after the data sync end of transmission, keyboard entry function automaticallyes switch back.
Though the present invention discloses with specific embodiment; but only in order to be easy to illustrate technology contents of the present invention; and be not with narrow sense of the present invention be limited in this embodiment open; any professional and technical personnel is not breaking away under the spirit and scope of the present invention situation; all can modify and change, so protection scope of the present invention is as the criterion by accompanying Claim book institute restricted portion.
Claims (14)
1. an input unit that is used for handheld information processor optionally connects this handheld information processor to a computer, and this input unit comprises:
A main connectivity port can be in order to connect this handheld information processor;
A transmission connectivity port can be in order to connect this computer;
An input unit controller can be in order to handle the input signal of user's pressing keys;
A path selection unit, be connected between this main connectivity port, this transmission connectivity port and this input unit controller, optionally between this main connectivity port and this transmission connectivity port, form one first transmission path, or between this main connectivity port and this input unit controller, form one second transmission path; And
User's choice device is optionally exported one first logic level and one second logic level;
Wherein, when user's choice device is exported this first logic level, this second transmission path of this path selection unit conducting, so that send the handled input signal of this input unit controller to this handheld information processor, when user's choice device is exported this second logic level, this first transmission path of this path selection unit conducting then is so that transmit data between this handheld information processor and this computer.
2. input unit as claimed in claim 1, this input unit are a keyboard, and this input unit controller is a keyboard controller.
3. input unit as claimed in claim 1, this transmission Port system is according to a RS-232 connectivity port of RS-232 non-synchronous transmissions standard.
4. input unit as claimed in claim 1, this user's choice device comprises a lockage button, and this lockage button has one first output and one second output, so that this first logic level and this second logic level to be provided.
5. input unit as claimed in claim 1, this first transmission path comprises a control signal path, and this handheld information processor can utilize this control signal path, transmits a control signal to control the time that this second logic level continues.
6. a Portable keyboard is applicable to a handheld information processor, comprising:
A keyboard controller comprises that a keyboard data transmits holding wire and a Keyboard Control holding wire;
One sequence transmission connectivity port comprises that a sequence data transmits a holding wire and a data set ready line;
One main connectivity port, this Portable keyboard is connected to this handheld information processor accordingly via this main connectivity port, and this main connectivity port comprises a sequence data received signal line, a main control signal line and a data terminal ready holding wire;
One path selection unit, in order in response to selecting signal, when this selects signal in first logic level, this keyboard data transmits holding wire and is couple to this sequence data received signal line, this Keyboard Control holding wire is couple to this main control signal line, and make this data terminal ready line suspension joint, when this selects signal in second logic level, this sequence data transmits holding wire and is couple to this sequence data received signal line, this data set ready line is couple to this data terminal ready line, and makes this main control signal line suspension joint;
A lockage button has one first output and is couple to this main control signal line and one second output, so that this first logic level and this second logic level to be provided; And
A combinational logic circuit, in order to produce this logical signal, an input of this combinational logic circuit is couple to this data set ready line, and another input of this combinational logic circuit is couple to second output of this lockage button,
Wherein, when being first logic level except signal at the signal of second output of this lockage button and this data set ready line, this logical signal that this combinational logic circuit produces is second logic level.
7. Portable keyboard as claimed in claim 6, wherein above-mentioned lockage button has one the 3rd end to accept a logic high potential, when when depressing above-mentioned lockage button, first output of above-mentioned lockage button, second output and the 3rd terminal shortcircuit, make first output and second output of above-mentioned lockage button produce this logic high potential, when decontroling above-mentioned lockage button, first output of above-mentioned lockage button, second output and the 3rd end recover open-circuit condition, make first output of above-mentioned lockage button and second output produce a logic low potential.
8. Portable keyboard as claimed in claim 7, wherein above-mentioned second logic level is above-mentioned logic high potential, above-mentioned first logic level is above-mentioned logic low potential.
9. Portable keyboard as claimed in claim 8, after wherein above-mentioned lockage button is depressed and decontrols, the feasible above-mentioned main control signal line that couples first output of above-mentioned lockage button produces a logic high potential pulse, carries out the data sync transmission to trigger above-mentioned handheld information processor via above-mentioned main connectivity port and above-mentioned sequence transmission connectivity port.
10. Portable keyboard as claimed in claim 9, after wherein above-mentioned lockage button is pressed down and decontrols, make the combinations thereof logical circuit export above-mentioned logic high potential pulse and give above-mentioned selection signal, be couple to above-mentioned sequence data received signal line and above-mentioned sequence data is transmitted holding wire, above-mentioned data set ready line is couple to above-mentioned data terminal ready line.
11. Portable keyboard as claimed in claim 10, when wherein above-mentioned handheld information processor carries out the data sync transmission via above-mentioned main connectivity port and above-mentioned sequence transmission connectivity port, the signal transition of above-mentioned data terminal ready line is above-mentioned logic high potential, make the signal on the above-mentioned data set ready line that is couple to above-mentioned data terminal ready line remain on above-mentioned logic high potential, and cause the above-mentioned selection signal of combinations thereof logical circuit output also to maintain above-mentioned logic high potential.
12. Portable keyboard as claimed in claim 11, during wherein above-mentioned handheld information processor end data synchronous driving, the signal transition of above-mentioned data terminal ready line is above-mentioned logic low potential, make the signal on the above-mentioned data set ready line that is couple to above-mentioned data terminal ready line reply above-mentioned logic low potential, and cause the above-mentioned selection signal of combinations thereof logical circuit output also to change above-mentioned logic low potential into.
13. Portable keyboard as claimed in claim 12, during wherein above-mentioned handheld information processor end data synchronous driving, above-mentioned selection signal transition is above-mentioned logic low potential, make above-mentioned keyboard data transmit holding wire and be couple to above-mentioned sequence data received signal line, above-mentioned Keyboard Control holding wire is couple to above-mentioned main control signal line.
14. Portable keyboard as claimed in claim 6, wherein above-mentioned sequence transmission connectivity port are the RS-232 connectivity ports according to RS-232 non-synchronous transmissions standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011357150A CN1180540C (en) | 2001-10-15 | 2001-10-15 | Input device for handheld information processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011357150A CN1180540C (en) | 2001-10-15 | 2001-10-15 | Input device for handheld information processing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1412949A CN1412949A (en) | 2003-04-23 |
| CN1180540C true CN1180540C (en) | 2004-12-15 |
Family
ID=4673280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011357150A Expired - Fee Related CN1180540C (en) | 2001-10-15 | 2001-10-15 | Input device for handheld information processing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1180540C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335997C (en) * | 2004-01-14 | 2007-09-05 | 威达电股份有限公司 | Switching control system and method for multiple input/output devices |
-
2001
- 2001-10-15 CN CNB011357150A patent/CN1180540C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1412949A (en) | 2003-04-23 |
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Granted publication date: 20041215 Termination date: 20121015 |