HD404848FS datasheet(36/127 Pages) RENESAS

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HD404849 Series

Active mode

Watch mode

Active mode

Oscillation

stabilization period

Interrupt strobe

INT

Interrupt request

generation

(During the transition

from watch mode to

active mode only)

t RC

Interrupt frame length

Oscillation stabilization period

Figure 17 Interrupt Frame

Bit

Initial value

Read/Write

Bit name

MIS3

MIS2

MIS0

MIS1

Miscellaneous register (MIS: $00C)

MIS1

MIS0

T *

0.24414 ms

tRC

0.12207 ms

0.24414 ms

7.8125 ms

31.25 ms

Oscillation circuit conditions

External clock input

Ceramic oscillator

Crystal oscillator

15.625 ms

62.5 ms

Not used

—

Notes: 1.

The values of T and tRC are applied when a 32.768-kHz crystal oscillator is used.

The value is applied only when direct transfer operation is used.

Buffer control.

Refer to figure 38.

MIS3

MIS2

* 1

* 2

Figure 18 Miscellaneous Register (MIS)

Subactive Mode: The OSC

1 and OSC2 oscillator stops and the MCU operates with a clock generated by

the X1 and X2 oscillator. In this mode, functions except the A/D conversion operate. However, because

the operating clock slows down, power dissipation is reduced, next least to watch mode.

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