LC75879PT_13 Datasheet, PDF (31/35 Pages) ON Semiconductor – LCD Display Driver

Display Control and the _INH Pin
LC75879PT
Since the LSI internal data (1/4 duty : the display data D1 to D272 and the control data, 1/3 duty : the display data D1 to
D207 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 S8/P8, S9 to S66, COM1 to COM3, COM4/S67,
S68, and S69/OSCI 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 5, Figure 6, Figure 7 and Figure 8.)
(1)1/4 duty
t1
t2
VDD
INH
CE
Internal data
D1 to D68, PS10, PS11,
PS2 to PS4, EXF, DN, OC,
P0 to P3, DT, SC, BU
D69 to D136, PF0 to PF3,
Internal data _{FC0 to FC2, CT0 to CT2}
Internal data
D137 to D200, W10 to W15,
W20 to W25, W30 to W35
Internal data (D201 to D272)
(2) 1/3 duty
VDD
Undefined
Display data and control
data transferred
VIL1
tc
VIL1
Defined
Undefined
Undefined
Defined
Undefined
Undefined
Defined
Undefined
Undefined
[Figure 5]
t1
Defined
Undefined
Note: t1>1ms
t2>0
tc … 10μs min
t2
INH
CE
D1 to D69, PS10, PS11,
Internal data _{PS2 to PS4, EXF, DN, OC,}
P0 to P3, DT, SC, BU
Internal data ^{D70 to D141, PF0 to PF3,}
FC0 to FC2, CT0 to CT2
Undefined
Undefined
Internal data ^{D142 to D207, W10 to W15,} Undefined
W20 to W25, W30 to W35
Display data and control
data transferred
VIL1
tc
VIL1
Defined
Undefined
Defined
Undefined
[Figure 6]
Defined
Undefined
Note: t1>1ms
t2>0
tc … 10μs min
No.A1687-31/35