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6 Commands

6.1 Communication

1.1 Change

Baud Rate

Dec

Hex

ASCII

254 57

FE 39

■ 9

Speed

v5.0

Immediately changes the baud rate. Not available in I2C. Baud rate can be temporarily forced to 19200 by a

manual override.

Speed

Byte

Valid settings shown below.

Table 8: Accepted Baud Rate Values

Rate

1200

2400

4800

9600

19200

28800

38400

57600

76800

115200

Speed

207

103

1.2 Change I

Slave Address

Dec

Hex

ASCII

254 51

FE 33

■ 3

Address

v5.0

Immediately changes the I

C write address. Only even values are permitted as the next odd address will become

the read address. Default is 80.

Address

Byte

Even value.

1.3 Transmission

Protocol Select

Dec

Hex

ASCII

254 160

FE A0

■ á

Protocol

v5.0

Selects the protocol used for data transmission from the display. Data transmission to the display is not affected.

Must be set to the protocol in use to receive data correctly.

Protocol

Byte

1 for Serial (RS232/TTL) or 0 for I

1.4 Set a Non-Standard

Baud Rate

Dec

Hex

ASCII

254 164

FE A4

■ ñ

Speed

v5.0

Immediately changes the baud rate to a non-standard value. Speed must be a whole number between 977 and

153800. Due to rounding, error increases with baud rate, actual baud must be within 3% of desired baud to ensure

accurate communication. Not available in I2C. Can be temporarily forced to 19200 by a manual override.

Speed

Word

Calculations shown below, standard crystal speed is 16MHz.

 





  



 

Equation 1: Speed Byte Calculation

  



 



  





Equation 2: Actual Baud Rate Calculation



  





 

Equation 3: Baud Rate Error Calculation

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 30 31

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