GSM7980 Syntec Semiconductor, GSM7980 Datasheet - Page 25

• Manufacturer Part Number: GSM7980
• Description: Dot Matrix LCD Controller/Driver
• Manufacturer: Syntec Semiconductor

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Assume the oscillation frequency is 270KHZ, 1 clock cycle time = 3.7us
LCD Controller / Driver
0
1. 1/8 Duty
2. 1/11 Duty
3. 1/16 Duty
COM1
COM1
COM1
1 frame = 3.7(us) x 400 x 8 = 11850(us)
= 11.9(ms)
1 frame = 3.7(us) x 200 x 16 = 11850(us)
= 11.9(ms)
V2(V3)
1 frame = 3.7(us) x 400 x 11 = 16300(us)
= 16.3(ms)
V2(V3)
Syntek Semiconductor Co., Ltd.
Vcc
Vcc
V1
V4
V5
V1
V2
V3
V4
V5
Vcc
V1
V4
V5
400 clocks
200 clocks
400 clocks
1
1
1
2
2
2
3
3
1 frame
1 frame
3
1 frame
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4
4
4
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16
8
11
1
1
1
ISSUE DATE :
2
2
GSM7980
2