lc75878e Sanyo Semiconductor Corporation, lc75878e Datasheet - Page 25

• Manufacturer Part Number: lc75878e
• 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 S73,
S74/COM10, S75/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 (D481 to D600)
Internal data (PC1 to PC4, CT0 to
Internal data (D1 to D120)
Internal data (D121 to D240)
Internal data (D241 to D360)
Internal data (D361 to D480)
CT3, CTC, SC, BU,
DT1, DT2)
INH
CE
V
V
DD
LCD
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
DD
) on
LCD
LC75878E, 75878W
Display and control data transfer
) off
LCD driver block power supply(V
Figure 3
LCD
Logic block power supply(V
4 level and the P1 to P4 to the V
LCD
DD
Defined
Defined
Defined
Defined
Defined
Defined
) on
) off
SS
level.) and during this
• t1 ≥ 0
• t2 > 0
• t3 ≥ 0 (t2 > t3)
• tc • • • 10 µs min
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
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