BU91796MUF-M Datasheet, PDF (10/27 Pages) Rohm – Low Duty LCD Segment Driver for Automotive application

BU91796MUF-M MAX 80 segments (SEG20×COM4)
Detailed Command Description
D7 (MSB) is a command or data judgment bit.
Refer to Command and data transfer method.
C: 0: Next byte is RAM write data.
1: Next byte is command.
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
When “Software Reset” is executed, BU91796MUF-M is reset to initial condition.
(Refer to Reset initialize condition)
Don‟t set Software Reset (P1) with P0 at the same time.
Set oscillator mode
Setup
P0 Reset initialize condition
Internal clock
0
○
External clock
1
Internal clock mode: OSCIN must be connected to VSS level.
External clock mode: 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
Datasheet
Command
OSCIN_EN
(Internal _signal )
(
Internal oscillation
( Internal signal )
External clock
( OSCIN ₎
ICSET
Internal clock mode
External clock mode
Figure 13. OSC MODE Switch Timing
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8.Feb.2016 Rev.001