BU9728AKV_08 Datasheet, PDF (3/24 Pages) Rohm – For 128-140 Segment type LCD LCD Segment Driver

CS
SCK
SD
C/D
tWL2
tSU2
tCYC
tWH1
tWL1
tSU1
tTLH
tH1
tTHL
tSCH
tSU3
tWH2
tTH2
tCYC
SCK
SD
D7
D6
tTH3
tCCH
tWAIT
D0
D7
Fig. BU9728AKV-1 Interface timing
Fig. BU9728AKV-2 Command cycle
● Reference data (BU9728AKV)
FRAME FREQ. － Rf
1k
700
500
400
300
200
VDD=5V
100
VDD=3V
70
50
40
30
20
10
100k
200k
300k 400k 500k 700k
1M
Oscillation Registance：Rf(Ω)
Fig. BU9728AKV-3 Frame frequency vs. Resister value
80
70
60
50
40
30
20
10
0
1.0
IDD－VDD
(VLCD=VC=VDD,Rf=470kΩ)
Accessing
Display
2.0
3.0
4.0
5.0
6.0
7.0
Supply Voltage：VDD(V)
Fig. BU9728AKV-4 Power consumption vs. Power supply
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