参数资料
| 型号： | DM300004-2 |
| 厂商： | Microchip Technology |
| 文件页数： | 92/114页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO DSPICDEM.NET 2 |
| 标准包装： | 1 |
| 系列： | dsPIC™ |
| 类型： | 微控制器 |
| 适用于相关产品： | CTR-21 PSTN，以太网 NIC |
| 所含物品： | 板，线缆，CD，电源 |
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PICDEM.net? 1 and dsPICDEM.net 2 Connectivity Dev Board User’s Guide
7.1.1
RS-232 Serial Port
A single RS-232 serial communication channel is provided on the dsPICDEM.net
Development Board. This serial communication channel, labeled J5, can be configured
as an RS-232 or RS-485/RS-422 communication channel via jumpers J17, J18 and
J19. The following jumper connections are required for RS-232 serial communications:
?
?
?
?
J19, shunt pins 1-2 for Tx channel support
J19, shunt pins 3-4 for Rx channel support
J17, shunt pins 1-2 for Request-to-Send (RTS) support
J17, shunt pins 3-4 for Clear-to-Send (CTS) support
Note:
The shunts for J17 and J19 must be connected vertically.
? J18, shunt pins 2-3 for Rx connection to the dsPIC device
Jumper 19 connects the dsPIC UART channel 1 U1RX and U1TX pins to an RS-232
level shifting IC, U7. The serial port is configured as DCE, and can be connected to a
PC using a straight-through cable. If hardware handshaking is required, inserting
shunts on jumper J17 will connect CTS and RTS to port pins RA9 and RA10 on the
dsPIC device. These pins can support CTS/RTS through a bit-bang control approach.
Both pins are connected to IC U7.
7.1.2
CAN Port
The CAN RXD and TXD lines of the MCP2551 are connected to the dsPIC CANRX and
CANTX pins. CAN bus signals, CANH and CANL, are available on the DB9 connector
J4. The CANH and CANL bus can be locally terminated with a 120 ohm by inserting
jumper, J3.
7.1.3
RS-485/RS-422 Port
Signals for the RS-485/RS-422 port are available on the 6-pin terminal block labeled
TB1. The terminal block is configurable from RS-485 to RS-422 by removing the
jumper on J2. Inserting jumper J1 will terminate the bus with a 120 ohm resistor.
The RX485 and TX485 lines of the MAX489E can be tied to the dsPIC UART channel 1
U1RX and U1TX pins by the following jumper settings:
? J19, shunt pins 1-2 for Tx channel support
? J19, shunt pins 3-4 for Rx channel support
Note:
The shunts for J19 must be connected vertically.
? J18, shunt pins 1-2 for Rx connection to the dsPIC device
MAX489E receiver and driver output enables are controlled by port pins RG0 and RG1,
respectively.
7.1.4
Temperature Sensor
This is a -40°C to +125°C linear output temperature sensor (TC1047A) connected to
analog channel AN3 of the dsPIC device. The output of the temperature sensor, U2, is
fed through a second order low-pass filter before connection to the dsPIC device. The
LP filter cutoff frequency is set at 10 Hz. The output voltage range for the TC1047A is
typically 750 mV at +25°C. The TC1047A exhibits a typical 10 mV/C voltage slope.
DS51471A-page 88
? 2004 Microchip Technology Inc.
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| DM300014 | 功能描述:开发板和工具包 - PIC / DSPIC dsPICDEM 1.1 GP RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
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