HD404818 Datasheet, PDF (34/100 Pages) Hitachi Semiconductor – 16-digit LCD driver

HD404818 Series
MIS: $00C
MIS2 MIS1 MIS0
t _RC selection
Refer to
table 20
MIS
1 Bit 0 Bit
0
0
0
1
1
0
1
1
T ^*1
t
*1
RC
0.12207 ms
0.24414 ms _{0.24414 ms *2}
15.625 ms 7.8125 ms
62.5 ms
31.25 ms
Not used
Oscillation circuit
condition
External clock input
Ceramic or crystal
oscillator
—
Notes: 1. The value of t RC applies only when using
a 32.768-kHz oscillator.
2. Only direct transfer.
Figure 13 Miscellaneous Register
Direct Transfer: By controlling the DTON, the MCU can be placed directly from subactive to active
mode. The detailed procedure is as follows:
• Set the DTON flag in subactive mode while LSON = 0.
• Execute the STOP or SBY instruction.
• After the oscillation stabilization time (a fixed value), the MCU will move automatically from subactive
to active mode.
Note that DTON ($020, bit 3) is valid only in subactive mode. When the MCU is in active mode, this flag
is always at reset.
The transition time (t_D) from subactive to active mode is t_RC < t_D < T + t_RC.
Interrupt
strobe
STOP/SBY
execution Internal
execution
Subactive mode
time (< T)
(LSON = 0, DTON = 1)
Direct transfer
timing
Oscillation
stabilization
time
Active mode
T
t _RC
T: Interrupt frame period
t _RC : Oscillation stabilization period
Figure 14 Direct Transfer Timing
MCU Operating Sequence: The MCU operates in the sequence shown in figures 15 to 17. It is reset by an
asynchronous RESET input, regardless of its state.
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