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| HD66712 Datasheet, PDF (88/88 Pages) Hitachi Semiconductor – Dot-Matrix Liquid Crystal Display Controller/Driver | |||
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HD66712U
tRES
RESET*
VIL1
VIL1
Note: When power is supplied, initializing by the internal reset circuit has priority. Accordingly,
the above RESET* input is ignored during internal reset period.
Figure 38 Reset Timing
VCC
2.7V/4.5V *2
0.2V
0.2V
0.2V
t rcc
0.1 ms ⤠t rcc ⤠10 ms
t OFF *1
t OFF â¥1 ms
Notes: 1. tOFF compensates for the power oscillation period caused by momentary power
supply oscillations.
2. Specified at 4.5V for 5-volt operation, and at 2.7V for 3-volt operation.
3. If the above electrical conditions are not satisfied, the internal reset circuit will not
operate normally. In this case, initialized by instruction. (Refer to the Initializing by
Instruction section.)
Figure 39 Power Supply Sequence
451
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