HD404816FS datasheet(34/100 Pages) RENESAS

34 / 100 page

HD404818 Series

MIS2

MIS1

MIS0

t RC selection

Refer to

table 20

MIS: $00C

MIS

1 Bit

0 Bit

0.24414 ms

15.625 ms

62.5 ms

Not used

—

0.12207 ms

0.24414 ms

7.8125 ms

31.25 ms

Oscillation circuit

condition

External clock input

Ceramic or crystal

oscillator

Notes:

t RC

1. The value of t

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 tRC < tD < T + tRC.

Subactive mode

Interrupt

strobe

Direct transfer

timing

Internal

execution

time (< T)

Oscillation

stabilization

time

Active mode

STOP/SBY

execution

(LSON = 0, DTON = 1)

Interrupt frame period

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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