lc75810e Sanyo Semiconductor Corporation, lc75810e Datasheet - Page 31

• Manufacturer Part Number: lc75810e
• Description: 1/8 To 1/10 Duty Dot-matrix Lcd Display Controller Driver
• Manufacturer: Sanyo Semiconductor Corporation

Notes on the Power On and Power Off Sequences
The following sequences must be observed when power is turned on and off. (See Figure 3.)
However, if the logic and LCD driver block use a shared power supply, then the power supplies can be turned on and off at
the same time.
At power on: Logic block power supply (V
At power off: LCD driver block power supply (V
Instruction execution
Display state
RES
V
V
LCD
DD
t1
t2
t3
tWRES
0
0
0 (t2
t3)
t1
tWRES
1 s min
V
IL
V
IH
Initial state settings
DD
Display off
) on
LCD
LC75810E/T
) off
LCD driver block power supply (V
Figure 3
Initial state setting
Set display technique
DCRAM data write
ALATCH data write (If ALATCH is used)
CGRAM data write (If CGRAM is used)
Set AC and SC addresses
Set display contrast (If the display contrast adjustment circuit is used)
(Turning the display on)
“Display on/off control”
instruction execution
Logic block power supply (V
Display on
(Turning the display off)
“Display on/off control”
instruction execution
LCD
DD
) on.
) off.
Display off
t2
t3
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