LC75843UGA Datasheet, PDF (30/35 Pages) ON Semiconductor – Duty General-Purpose LCD Driver

LC75843UGA
Display Control and the INH Pin
Since the LSI internal data (1/4 duty : the display data D1 to D100 and the control data, 1/3 duty : the display data D1 to
D78 and the control data, 1/2 duty : the display data D1 to D54 and the control data, 1/1 duty : the display data D1 to
D28 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 to S4/P4, S5 to S24, COM4/S25,
COM3/S26,COM2/S27, COM1, and S28 pins 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 display at power on. (See Figure 4, Figure 5, Figure 6, Figure 7.)
(1)1/4 duty
t1
t2
VDD
INH
CE
Internal
data ^{(D1 to D100, DT0, DT1)}
Internal
data
W10 to W15, W20 to W25,
W30 to W35, PF0 to PF3,
PS10, PS11 to PS40, PS41,
P0 to P2, FC0 to FC3,
DN, EXF, OC, SC, BU
(2)1/3 duty
VDD
VIL1
tc
VIL1
Display data and
control data transferred
Undefined
Defined
Undefined
Undefined
Defined
[Figure 4]
Undefined
Note : t1>1ms
t2>0
tc … 10s min
t1
t2
INH
CE
Internal
data ^{(D1 to D78, DT0, DT1)}
Internal
data
W10 to W15, W20 to W25,
W30 to W35, PF0 to PF3,
PS10, PS11 to PS40, PS41,
P0 to P2, FC0 to FC3,
DN, EXF, OC, SC, BU
VIL1
tc
VIL1
Display data and
control data transferred
Undefined
Defined
Undefined
Undefined
Defined
[Figure 5]
Undefined
Note : t1>1ms
t2>0
tc … 10s min
No.A2226-30/35