BU91510KV-M Datasheet, PDF (22/32 Pages) Rohm – Multi- function LCD Segment Drivers

BU91510KV-M
Datasheet
The INHb pin and Display Control
Since the IC internal data (1/4-Duty: the display data D1 to D216 and the control data, 1/3-Duty: the display data D1 to
D162 and the control data) is undefined when power is first applied, applications should set the INH pin low at the same
time as power is applied to turn off the display (This sets the S1/P1/G1 to S6/P6/G6, S7 to S54, COM1 to COM4 to the VSS
level.) and during this period send serial data from the controller. The controller should then set the INH pin high after the data
transfer has completed. This procedure prevents meaningless displays at power on.
1. 1/4-Duty
t1
V _DD
INHb
SCE
Internal data
D1 to D56 ,P0 to P2,DR,
DT,OC,FC0 to FC2,SC,BU
Internal data
D58 to D112,PG1 to PG6,
PF0 to PF3
Internal data
(D113 to D164,W10 to W35)
Internal data
(D165 to D216,W40 to W65)
Display data and control data transfer
VIL1
tc
VIL1
Undefined
Defined
Undefined
Defined
Undefined
Defined
Undefined
Defined
2. 1/3-Duty
Figure 15. Power ON/OFF and INHb Control Sequence (1/4-Duty)
t1
Undefined
Undefined
Undefined
Undefined
V _DD
INHb
SCE
Internal data
D1 to D56 ,P0 to P2,DR,
DT,OC,FC0 to FC2,SC,BU
Internal data
D58 to D112,PG1 to PG6,
PF0 to PF3
Internal data
(D113 to D162,W10 to W35)
Internal data
(W40 to W65)
Display data and control data transfer
VIL1
tc
VIL1
Undefined
Defined
Undefined
Defined
Undefined
Defined
Undefined
Defined
Undefined
Undefined
Undefined
Undefined
Figure 16. Power ON/OFF and INHb Control Sequence (1/3-Duty)
Note: t1≥0, tc: min 10us
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8.July.2015 Rev.001