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IRMCS2033
RS232C connector
IRMCS2033 has one serial RS232C connector (J6) on the board. The connector is a D-sub 9 pin standard PC
female connector and directly connectable to a PC serial port. As shown in Figure 6, pin 2 is the send signal and
pin 3 is the receive signal; both are 10V signal level. The baud rate is fixed at 57.6kbps. The signal format is 8 bits,
no parity, 1 stop bit configuration.
J6
1
2
3
4
5
6
7
8
9
TX1
RX1
No connection
DB9RF
Figure 6. RS232C Connector
RS-232 Register Access
The IRMCK203 includes an RS-232 interface channel that provides a direct connection to the host PC. The software
interface combines a basic "register map" control interface with a simple communication protocol to accommodate
potential communication errors. For more detailed information, please refer to the IRMCK203 Application
Developer’s Guide.
RS-232 Register Write Access
A Register write operation consists of a command/address byte, byte count, register data and checksum. When the
IRMCK203 receives the register data, it validates the checksum, writes the register data, and transmits and
acknowledgement to the host.
Command / Address Byte
Byte Count
1-6 bytes of register data
Checksum
Register Write Operation
Command Acknowledgement Byte
Register Write Acknowledgement
Checksum
This document is the property of International Rectifier and may not be copied or distributed without expressed consent.
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