参数资料
型号: DM300014
厂商: Microchip Technology
文件页数: 46/72页
文件大小: 0K
描述: BOARD DEMO DSPICDEM 1.1 GEN PURP
标准包装: 1
dsPICDEM? 1.1 Development Board User’s Guide
FIGURE 4-2:
DSPIC30F DEVICE PLUG-IN MODULE
Match Pin 1 index marker of
dsPIC30F device to lower left 45°
corner of the 80-pin QFP footprint
(pin 1 of Emulation Header).
4.1.1
RS-232 Serial Ports
Two RS-232 serial communication channels are provided on the dsPICDEM 1.1
Development Board. One serial communication channel (DB9 connector J5/PORT B)
can be configured as an RS-232 or RS-485/RS-422 communication channel by setting
jumper J4 to the RX232/TX232 position. This jumper position connects the dsPIC
UART channel 1 U1RX and U1TX pins to an RS-232 level-shifting IC (U3).
The serial port is configured as Data Communication Equipment (DCE), and can be
connected to a PC using a straight-through cable. If hardware handshaking is required,
inserting jumper J3 will connect CTS and RTS to port pins RD4 and RD5 on the dsPIC
device. These pins can support CTS/RTS through a bit-bang control approach. Both
pins are connected to IC U3.
Setting jumper J4 to the TX485/RX485 position configures the dsPIC UART channel 1
U1RX and U1TX pins for a RS-485/RS-422 communication channel.
The second serial communication channel (DB9 connector J2/PORT A) is connected
to the dsPIC UART channel 2 U2RX and U2TX pins via RS-232 level-shifting IC (U1).
This channel is a dedicated RS-232 serial communication channel. Hardware flow
control is not provided.
The schematic of these ports is shown in Figure A-4: “dsPICDEM 1.1 Development
4.1.2
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 DB9 connector J20.
The CANH and CANL bus can be locally terminated with a 120-ohm resistor by
inserting jumper, J18.
The schematic of the CAN port is shown in Figure A-4: “dsPICDEM 1.1 Development
DS70099B-page 42
Advance Information
? 2003 Microchip Technology Inc.
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