BU9728 데이터 시트보기 (PDF) - ROHM Semiconductor

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BU9728

For 128～ 140 Segment type LCD, LCD Segment Driver

ROHM Semiconductor 

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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