SA9122E
3. LCD Programming Protocol
ProgrammingoftheSA9122E'son-chipLiquidCrystalDisplaymemoryisperformed
via a serial interface having a RS232 data format. The data for display is transferred
on RX at 19 200 baud.
The format of the data as well as the data memory map, is given below:
Data format on RX
START
A0
A1
A2
A3
D0
D1
D2
D3
STOP
DR-00937
LCD memory map
Inserting a '1' into a memory location turns the segment on and a '0' turns the
segment off.
A3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
A2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
A1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
D3
D2
D1
D0
Pin
S[0]
S[1]
S[2]
S[3]
S[4]
S[5]
S[6]
S[7]
S[8]
S[9]
S[10]
S[11]
S[12]
S[13]
S[14]
S[15]
R[3]
R[2]
R[1]
R[0]
7/12
sames
SAMES [ SAMES ]
