lc75848t Sanyo Semiconductor Corporation, lc75848t Datasheet - Page 25

• Manufacturer Part Number: lc75848t
• Description: 1/8 To 1/10 Duty General-purpose Lcd Display Drivers
• Manufacturer: Sanyo Semiconductor Corporation

The INH Pin and Display Control
Since the IC internal data (the display data 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 to S93,
S94/COM10, S95/COM9, and COM1 to COM8 to the V
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. (See figures 3, 4, and 5.)
Power Supply Sequence
The following sequences must be observed when power is turned on and off. (See figures 3, 4, and 5.)
• Power on :Logic block power supply(V
• Power off:LCD driver block power supply(V
However, if the logic and LCD driver blocks use a shared power supply, then the power supplies can be turned on and off
at the same time.
• 1/8 duty
Internal data (D1 to D120)
Internal data (D121 to D240)
Internal data (D241 to D360)
Internal data (D361 to D480)
Internal data (D481 to D600)
Internal data (D601 to D720)
Internal data (D721 to D760)
Internal
data
PC1 to PC4
CT0 to CT3, CTC
SC, BU, FC
DT1, DT2
V
V
CE
INH
DD
LCD
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
t 1
DD
) on
LCD
) off
LCD driver block power supply(V
Display and control data transfer
LC75848T
Figure 3
LCD
Logic block power supply(V
4 level and the P1 to P4 to the V
LCD
DD
) on
) off
Defined
Defined
Defined
Defined
Defined
Defined
Defined
Defined
VIL
tc
SS
• t1
• t2 > 0
• t3
• tc • • • 10 s min
level.) and during this
VIL
0
0 (t2 > t3)
t2
No. 7160-25/33
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
t3