5. Power-Down Modes
Rev.3.00 Jul. 19, 2007 page 113 of 532
REJ09B0397-0300
5.5.2 Clearing
Subsleep Mode
Subsleep mode is cleared by an interrupt (timer A, timer C*, IRQ
0
, IRQ
1
, IRQ
2
*, IRQ
3
, IRQ
4
,
WKP
0
to WKP
7
) or by a low input at the
RES
pin.
Note: * The timer C and IRQ
2
interrupts are functions of the H8/3857 Group only, and are not
provided in the H8/3854 Group.
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, IRQ
0
, or WKP
0
to WKP
7
interrupt is
requested while the LSON bit in SYSCR1 is set to 1. From subsleep mode, subactive mode is
entered if a timer A, timer C*, IRQ
0
, IRQ
1
, IRQ
2
*, IRQ
3
, IRQ
4
, or WKP
0
to WKP
7
interrupt is
requested. A transition to subactive mode does not take place if the I bit of CCR is set to 1 or the
particular interrupt is disabled in the interrupt enable register.
Note: * The timer C and IRQ
2
interrupts are functions of the H8/3857 Group only, and are not
provided in the H8/3854 Group.
5.6.2 Clearing
Subactive
Mode
Subactive mode is cleared by a SLEEP instruction or by a 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 Clearing by
RES
pin in section 5.3.2, Clearing Standby Mode.
Summary of Contents for F-ZTAT H8 Series
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