BU9796AFS-E2 Datasheet, PDF (14/32 Pages) Rohm – Standard LCD Segment Driver

BU9796Axxx Series MAX 80 segments (SEG20×COM4)
Datasheet
○Mode Set (MODE SET)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C
1
0
*
P3 P2
*
*
( * : Don’t care)
Set display ON and OFF
Setting
P3
Display OFF
0
Display ON
1
Reset initialize condition
○
Display OFF : Regardless of DDRAM data, all SEGMENT and COMMON output will be stopped after 1frame off
data write. Display OFF mode will be disabled after Display ON command.
Display ON : SEGMENT and COMMON output will be active and start to read the display data from DDRAM.
Set bias level
setup
P2
1/3 Bias
0
1/2 Bias
1
Refer to LCD driving waveform
Reset initialize condition
○
○Address set (ADSET)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C
0
0 P4 P3 P2 P1 P0
The range of address can be set as 00000 to 10011(2).
Don’t set out of range address, otherwise address will be set 00000.
○Set IC Operation (ICSET)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C
1
1
0
1
*
P1 P0
( * : Don’t care)
Set software reset execution
Setup
P1
No operation
0
Software Reset execute
1
This command will be set initialize condition.
Set oscillator mode
setup
P0
Reset initialize condition
Internal oscillation
0
○
External clock input
1
Internal oscillation: Must be connected to VSS.
External clock input: Input external clock from OSCIN terminal
【Frame frequency Calculation at external clock mode】
DISCTL 80Hz setting: Frame frequency [Hz] = external clock [Hz] / 512
DISCTL 71Hz setting: Frame frequency [Hz] = external clock [Hz] / 576
DISCTL 64Hz setting: Frame frequency [Hz] = external clock [Hz] / 648
DISCTL 53Hz setting: Frame frequency [Hz] = external clock [Hz] / 768
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TSZ02201-0A2A0D300100-1-2
13.Jun.2014 Rev.003