LCD2041-GW Matrix Orbital, LCD2041-GW Datasheet - Page 17

• Manufacturer Part Number: LCD2041-GW
• Description: LCD Character Display Modules White Background Blue Text
• Manufacturer: Matrix Orbital

4.1.3 Serial Communication
RS-232 protocol at at a default baud rate of 19,200 bps and is capable of standard baud rates from 9600
to 115,200 bps. Furthermore the LCD0821 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 -30V to +30V or at TTL levels of 0 to +5V
by setting the Protocol Select Jumpers to TTL.
4.2 Changing the I
4.3 Changing the Baud Rate
Matrix Orbital
In addition to being able to communicate via I
Syntax
Parameters
Description
Remembered
Default
Syntax
Parameters
This command sets the I
and 0xFF. The I
address is automatically set to one higher. For example if the I
address is set to 0x50, then the read address is 0x51.
NOTE The change in address is immediate.
Always
0x50
Hexadecimal
Decimal
ASCII
Parameter
adr
Hexadecimal
Decimal
ASCII
Parameter
speed
2
C Slave Address
2
C write address must be an even number and the read
0xFE 0x33 [adr]
254 51 [adr]
254 “3” [adr]
0xFE 0x39 [speed]
254 57 [speed]
254 “9” [speed]
LCD0821
Length
Length
1
1
2
2
C write address of the module between 0x00
C the LCD0821 communicates natively through the
Description
The new I
0xFF).
Description
Hex value corresponding to a baud
rate.
2
C write address (0x00 -
2
C write
13