PM9904BPD 查看數據表（PDF） - South African Micro Electronic Systems
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PM9904BPD Datasheet PDF : 22 Pages
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PM9904BPD
Commands
The demonstration software uses a buffer in memory on the
PC to generate the complete display. The buffer is dumped to
the LCD driver device in one go. The data passed to the driver
IC is formatted with a starting address followed by the data for
all segments. The first 8 bits is interpreted as address byte and
the rest of the data is sequentially passed as data bytes. The
address counter on the driver IC is incremented every 8
clocks. The procedure is repeated until all of the LCD memory
is filled up.
Address
The address of the data is set up in the following manner
Pin36
Pin35
sames
To write to the device the following address is passed:
1 0 A5 A4 A3 A2 A1 A0
Data
Data to the device is passed with MSB first
D7 D6 D5 D4 D3 D2 D1 D0
Were D7 and D3 map to pin VR[3] of driver and COM4 of LCD
Were D6 and D2 map to pin VR[2] of driver and COM3 of LCD
Were D5 and D1 map to pin VR[1] of driver and COM2 of LCD
Were D4 and D0 map to pin VR[0] of driver and COM1 of LCD
See SA8807A datasheet for more information.
Pin32
T1
T2
T3
T4
DR-01255
Cosf
Total
Com
Cost
a
f
b
1
g
e
c
d
h
a
f
b
4
g
e
c
d
h
COM1
COM2
COM3
COM4
Pin1
Pin2
Pin5
COLUMNS
Figure 12: Mapping of a single character
Address
LCD Pin
COM1, 17
COM2, 18
COM3, 19
COM4, 20
5
4
3
30 7
32 5
33 4
5f
5a 4f
4a 3f
3a
5g 5b 4g 4b 3g 3b
5e 5c 4e 4c 3e 3c
5d 5h 4d 4h 3d 3h
Table 1: LCD display memory map
2
34 3
2f
2a
2g 2b
2e 2c
2d 2h
Address
LCD Pin
COM1, 17
COM2, 18
COM3, 19
COM4, 20
11
10
9
8
23
21 16
22
15 24 13
Blank
Blank
k1
k2 % Error V
8f 8a
Blank
Blank
Hz W imp/KWh A
8g 8b
Blank
Blank
~ 1 s Wh/imp r
8e 8c
T1, T2, T3, T4 Total
~2 h ~3
h
8d 8h
Table 2: LCD display memory map (continued)
1
35 2
1f
1a
1g 1b
1e 1c
1d 1h
0
36 1
Cosi T1
Total T2
Com T3
Cost T4
7
26 11
7f 7a
7g 7b
7e 7c
7d 7h
6
28 9
6f
6a
6g 6b
6e 6c
6d 6h
http://www.sames.co.za
10/22
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