SA9122EPA Ver la hoja de datos (PDF) - South African Micro Electronic Systems
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SA9122EPA
South African Micro Electronic Systems
SA9122EPA Datasheet PDF : 12 Pages
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SA9122E
3. LCD Programming Protocol
Programming of the SA9122E's on-chip Liquid Crystal Display memory is performed
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
A2
A1
A0
D3
D2
D1
D0 Pin
0
0
0
0
S[0]
0
0
0
1
S[1]
0
0
1
0
S[2]
0
0
1
1
S[3]
0
1
0
0
S[4]
0
1
0
1
S[5]
0
1
1
0
S[6]
0
1
1
1
S[7]
1
0
0
0
S[8]
1
0
0
1
S[9]
1
0
1
0
S[10]
1
0
1
1
S[11]
1
1
0
0
S[12]
1
1
0
1
1
1
1
0
S[13]
S[14]
1
1
1
1
S[15]
R[3] R[2] R[1] R[0]
sames
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