h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 798

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 24 Power-Down State
24.12
24.12.1 On-Chip Peripheral Module Interrupt
24.12.2 Entering Subactive/Watch Mode and DTC Module Stop
To enter subactive or watch mode, set DTC to module stop (write 1 to the MSTP14 bit) and
reading the MSTP14 bit as 1 before transiting mode. After transiting from subactive mode to
active mode, clear module stop.
When DTC activation factor occurs in subactive mode, DTC is activated when module stop is
cleared after active mode is entered.
Rev. 3.00 Jan 18, 2006 page 770 of 1044
REJ09B0280-0300
Subactive Mode/Watch Mode
On-chip peripheral modules (DTC, FRT, TMRX, TMRY, Timer Connection, IIC) that stop
operation in subactive mode cannot clear interrupts in subactive mode. Therefore, if subactive
mode is entered when an interrupt is requested, CPU interrupt factors cannot be cleared.
Interrupts should therefore before executing the SLEEP instruction and entering subactive or
watch mode.
Usage Notes