CN203659002U - Device for communication of single-chip microcomputer and PC (personal computer) - Google Patents
Device for communication of single-chip microcomputer and PC (personal computer) Download PDFInfo
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- CN203659002U CN203659002U CN201420005847.4U CN201420005847U CN203659002U CN 203659002 U CN203659002 U CN 203659002U CN 201420005847 U CN201420005847 U CN 201420005847U CN 203659002 U CN203659002 U CN 203659002U
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Abstract
The utility model relates to a device for communication of a single-chip microcomputer and a PC (personal computer). The device comprises a single-power conversion chip connected between the single-chip microcomputer and the PC, a first diode, a second diode, first capacitors and second capacitors are parallelly connected at two ends of the single-power conversion chip, an anode of the first diode is connected at a data transmitting end of an RS-232 standard serial port of the PC, a cathode of the first diode is connected at a data receiving end of the single-chip microcomputer, the first capacitors are parallelly connected at two ends of the first diode, an anode of the second diode is connected at a data transmitting end of the single-chip microcomputer, a cathode of the second diode is connected at a data receiving end of the RS-232 standard serial port of the PC, and the second capacitors are parallelly connected at two ends of the second diode. The device is low in cost and has higher electromagnetic interference resistance.
Description
Technical field
The utility model belongs to single-chip microcomputer and PC communication technical field, is specifically related to a kind of device of communicating by letter with PC for single-chip microcomputer.
Background technology
At present, the communication mode of single-chip microcomputer and PC is all mainly using PC (personal computer) as host computer, single-chip microcomputer is as slave computer, the two receives or sends data by RS-232 serial ports, the level conversion of RS-232 signal and microcontroller serial port signal adopts MAX232 chip, its inside has the communicator interface circuit of dual drive and dual receiver, carries out multiplication of voltage and polarity of voltage conversion by external capacitor.
MAX232 chip, is the single supply level transferring chip that letter (MAXIM) company of U.S. aims at the design of rs-232 standard serial ports, use+5v single power supply.Existing employing MAX232 chip may cause data transmission to go wrong in the relatively strong region of some electromagnetic interference (EMI), and such as high-tension electricity room etc., if peripheral shielding or other devices are set, manufacturing cost can rise again much.
Utility model content
In order to address the above problem, the purpose of this utility model is to provide a kind of device of communicating by letter with PC for single-chip microcomputer, not only cheap but also have a stronger anti-electromagnetic interference capability.
For achieving the above object, technical scheme that the utility model adopts is as follows:
A kind of device of communicating by letter with PC for single-chip microcomputer, comprise the single supply conversion chip being connected between single-chip microcomputer and PC, also be parallel with the first diode at described single supply conversion chip two ends, the second diode, the first electric capacity and the second electric capacity, the anodic bonding of described the first diode is at the data sending terminal of the rs-232 standard serial ports of PC, the negative electrode of described the first diode is connected to the data receiver of single-chip microcomputer, described the first Capacitance parallel connection is at described the first diode two ends, the anodic bonding of described the second diode is at the data sending terminal of described single-chip microcomputer, the negative electrode of described the second diode is connected to the data receiver of the rs-232 standard serial ports of described PC, described the second Capacitance parallel connection is at described the second diode two ends.
Further, described single supply conversion chip is MAX232 chip.
Further, described single-chip microcomputer is AT89S52 single-chip microcomputer.
The utility model is connecting after single-chip microcomputer and PC; the diode consistent with data transfer direction and electric capacity can shield most of electromagnetic fields and change the surging causing; and arranging of electric capacity can effectively protect the situation of the breakdown inefficacy of diode to occur, and improves unfailing performance of the present utility model.Meanwhile, the utility model only adopts simple separation original paper combination to improve the anti-electromagnetic interference capability of single-chip microcomputer and PC data transmission procedure, thereby makes the utlity model has higher cost advantage.
Brief description of the drawings
The picture that this brief description of the drawings provides is used for auxiliary to further understanding of the present utility model, forms the application's a part, does not form to improper restriction of the present utility model, in the accompanying drawings:
Fig. 1 is electrical block diagram of the present utility model.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific implementation method, be used for explaining the utility model in exemplary embodiment and description of the present utility model, but not as to restriction of the present utility model.
Embodiment 1:
As shown in Figure 1, the utility model discloses a kind of device of communicating by letter with PC for single-chip microcomputer, comprise the single supply conversion chip being connected between single-chip microcomputer and PC, realize the signal transmission between the two by this single supply conversion chip.The utility model is also parallel with the first diode D1 at described single supply conversion chip two ends, the second diode D2, the first capacitor C 1 and the second capacitor C 2, the anodic bonding of described the first diode D1 is at the data sending terminal of the rs-232 standard serial ports of PC, the negative electrode of described the first diode D1 is connected to the data receiver of single-chip microcomputer, described the first capacitor C 1 is connected in parallel on described the first diode D1 two ends, the anodic bonding of described the second diode D2 is at the data sending terminal of described single-chip microcomputer, the negative electrode of described the second diode D2 is connected to the data receiver of the rs-232 standard serial ports of described PC, described the second capacitor C 2 is connected in parallel on described the second diode two ends.
Wherein, described single supply conversion chip is MAX232 chip, is the single supply level transferring chip that letter (MAXIM) company of U.S. aims at the design of rs-232 standard serial ports, use+5v single power supply.
Wherein, described single-chip microcomputer is AT89S52 single-chip microcomputer.AT89S52 is a kind of low-power consumption, high-performance CMOS 8 8-digit microcontrollers, has 8K at system programmable Flash storer.Use the manufacture of Atmel company high-density nonvolatile memory technology, completely compatible with the instruction of industrial 80C51 product and pin.
Wherein, PC PC (personal computer), personal computer, comprises desktop computer, notebook and panel computer.
When the utility model uses, connect according to accompanying drawing mode, other peripheral circuits and prior art are always, no longer in figure, signal is stated with tired, key is by the first diode D1, the second diode D2, the first capacitor C 1 and the second capacitor C 2 are curing together according to accompanying drawing mode with existing MAX232 chip, thereby make it consistent with existing MAX232 chip line in use, and then make the novel the utility model that not only reached of this use improve anti-electromagnetic interference capability under low cost prerequisite, and use identical with the line of existing MAX232 chip, its compatibility and ease of use are improved.
The technical scheme above the utility model embodiment being provided is described in detail; for one of ordinary skill in the art; according to the utility model embodiment, the change part in embodiment and range of application, is all protection domain of the present utility model.
Claims (3)
1. a device of communicating by letter with PC for single-chip microcomputer, comprise the single supply conversion chip being connected between single-chip microcomputer and PC, it is characterized in that: be also parallel with the first diode at described single supply conversion chip two ends, the second diode, the first electric capacity and the second electric capacity, the anodic bonding of described the first diode is at the data sending terminal of the rs-232 standard serial ports of PC, the negative electrode of described the first diode is connected to the data receiver of single-chip microcomputer, described the first Capacitance parallel connection is at described the first diode two ends, the anodic bonding of described the second diode is at the data sending terminal of described single-chip microcomputer, the negative electrode of described the second diode is connected to the data receiver of the rs-232 standard serial ports of described PC, described the second Capacitance parallel connection is at described the second diode two ends.
2. device of communicating by letter with PC for single-chip microcomputer according to claim 1, is characterized in that:
Described single supply conversion chip is MAX232 chip.
3. device of communicating by letter with PC for single-chip microcomputer according to claim 1, is characterized in that:
Described single-chip microcomputer is AT89S52 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420005847.4U CN203659002U (en) | 2014-01-06 | 2014-01-06 | Device for communication of single-chip microcomputer and PC (personal computer) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420005847.4U CN203659002U (en) | 2014-01-06 | 2014-01-06 | Device for communication of single-chip microcomputer and PC (personal computer) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203659002U true CN203659002U (en) | 2014-06-18 |
Family
ID=50925370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420005847.4U Expired - Fee Related CN203659002U (en) | 2014-01-06 | 2014-01-06 | Device for communication of single-chip microcomputer and PC (personal computer) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203659002U (en) |
-
2014
- 2014-01-06 CN CN201420005847.4U patent/CN203659002U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20150106 |
|
| EXPY | Termination of patent right or utility model |