HD4043612F 查看數據表（PDF） - Hitachi -> Renesas Electronics

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HD4043612F

4-bit HMCS400-series microcomputer

Hitachi -> Renesas Electronics 

HD404369 Series

frame timing, but it is regarded as input synchronously with the second interrupt strobe clock after the

falling edge. An overflow and interrupt request in timer A is generated synchronously with the interrupt

strobe timing.

Active mode

Watch mode

Oscillation

stabilization period

Active mode

Interrupt strobe

INT0

Interrupt request

generation

(During the transition

T

from watch mode to

active mode only)

T: Interrupt frame length

tRC : Oscillation stabilization period

T

tRC

TX

T + tRC ≤ TX ≤ 2T + tRC

Figure 14 Interrupt Frame

Direct Transition from Subactive Mode to Active Mode: Available by controlling the direct transfer on

flag (DTON: $020, bit 3) and the low speed on flag (LSON: $020, bit 0). The procedures are described

below:

• Set LSON to 0 and DTON to 1 in subactive mode.

• Execute the STOP or SBY instruction.

• The MCU automatically enters active mode from subactive mode after waiting for the MCU internal

processing time and oscillation stabilization time (figure 16).

Notes: 1. The DTON flag ($020, bit 3) can be set only in subactive mode. It is always reset in active

mode.

2. The transition time (TD) from subactive mode to active mode:

tRC < TD < T + tRC

32

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