Matrix Orbital LCD/VFD Legacy - Manual (Page 4)

Configuring LCD2021
Default configuration is J1 and J2 installed. This configures the RS-232 to 19 200 baud and I²C to slave address 0x5C -
depending on which connector is used. Please refer to the Appendix of this manual for programming notes.
RS-232 port: J0, J1, J2 - control baud rate
RS-232 format is 8N1 (8 characters, no parity, one stop bit)
I²C port: J0, J1, J2, J3 - sets slave peripheral address
Baud Rate Slave Address J3 J2 J1 J0
50H Off Off Off Off 1200
52H Off Off Off On
54H Off Off On Off 2400
56H Off Off On On
58H Off On Off Off 9600
5AH Off On Off On
5CH Off On On Off 19200
5EH Off On On On
60H On Off Off Off 1200
62H On Off Off On
64H On Off On Off 2400
66H On Off On On
68H On On Off Off 9600
6AH On On Off On
6CH On On On Off 19200
6EH On On On On
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