Matrix Orbital PK162-12 - Manual (Page 19)

4.1.2 Serial Communication
In addition to being able to communicate via I 2 C the PK162-12 communicates natively through the RS-
232 protocol at a default baud rate of 19,200 bps and is capable of standard baud rates from 1200 to 57600
bps. Furthmore the PK162-12 is also capable of reproducing any non-standard baud rate in between using
values entered into our baud rate generation algorithm and set through command 164 (0xA4). The display
module communicates at standard voltage levels of ±12V to ±12V or at TTL levels of 0 to +5V by setting
the Protocol Select Jumpers to TTL.
4.2 Changing the I 2 C Slave Address
Syntax Hexadecimal 0xFE 0x33 [adr]
Decimal 254 51 [adr]
ASCII 254 “3” [adr]
Parameters Parameter Length Description
adr 1 The new I 2 C write address (0x00 -
0xFF).
Description This command sets the I 2 C write address of the module between 0x00
and 0xFF. The I 2 C write address must be an even number and the read
address is automatically set to one higher. For example if the I 2 C write
address is set to 0x50, then the read address is 0x51.
NOTE The change in address is immediate.
Remembered Always
Factory Default 0x50
4.3 Changing the Baud Rate
Syntax Hexadecimal 0xFE 0x39 [speed]
Decimal 254 57 [speed]
ASCII 254 “9” [speed]
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