Clearing Subsleep Mode; Subactive Mode; Transition To Subactive Mode; Clearing Subactive Mode - Renesas H8 Series Hardware Manual

Section 5 Power-Down Modes
5.5.2

Clearing Subsleep Mode

Subsleep mode is cleared by an interrupt (timer A, IRQ
RES pin.
• Clearing by interrupt
When an interrupt is requested, subsleep mode is cleared and interrupt exception handling
starts. Subsleep mode is not cleared if the I bit of CCR is set to 1 or the particular interrupt is
disabled in the interrupt enable register.
• Clearing by RES input
Clearing by RES pin is the same as for standby mode; see section 5.3.2, Clearing Standby
Mode.
5.6

Subactive Mode

5.6.1

Transition to Subactive Mode

Subactive mode is entered from watch mode if a timer A or IRQ
LSON bit in SYSCR1 is set to 1. From subsleep mode, subactive mode is entered if a timer A,
IRQ to IRQ , or INT
3 0
place if the I bit of CCR is set to 1 or the particular interrupt is disabled in the interrupt enable
register.
5.6.2

Clearing Subactive Mode

Subactive mode is cleared by a SLEEP instruction or by input at the RES pin.
• Clearing by SLEEP instruction
If a SLEEP instruction is executed while the SSBY bit in SYSCR1 is set to 1 and TMA3 bit in
TMA is set to 1, subactive mode is cleared and watch mode is entered. If a SLEEP instruction
is executed while SSBY = 0 and LSON = 1 in SYSCR1 and TMA3 = 1 in TMA, subsleep
mode is entered. Direct transfer to active mode is also possible; see section 5.8, Direct
Transfer, below.
• Clearing by RES pin
Clearing by RES pin is the same as for standby mode; see section 5.3.2, Clearing Standby
Mode.
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to INT interrupt is requested. A transition to subactive mode does not take
7 0
to IRQ , INT to INT
3 0 7
interrupt is requested while the
0
) or by input at the
0