HD64F38024HV Datasheet, PDF (165/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 5 Power-Down Modes
5.9 Module Standby Mode
5.9.1 Setting Module Standby Mode
Module standby mode is set for individual peripheral functions. All the on-chip peripheral
modules can be placed in module standby mode. When a module enters module standby mode,
the system clock supply to the module is stopped and operation of the module halts. This state is
identical to standby mode.
Module standby mode is set for a particular module by setting the corresponding bit to 0 in clock
stop register 1 (CKSTPR1) or clock stop register 2 (CKSTPR2). (See table 5.5.)
5.9.2 Clearing Module Standby Mode
Module standby mode is cleared for a particular module by setting the corresponding bit to 1 in
clock stop register 1 (CKSTPR1) or clock stop register 2 (CKSTPR2). (See table 5.5.)
Following a reset, clock stop register 1 (CKSTPR1) and clock stop register 2 (CKSTPR2) are both
initialized to H'FF.
Table 5.5 Setting and Clearing Module Standby Mode by Clock Stop Register
Register Name Bit Name
CKSTPR1
TACKSTP
1
0
TCCKSTP
1
0
TFCKSTP
1
0
TGCKSTP
1
0
ADCKSTP
1
0
S32CKSTP
1
0
Operation
Timer A module standby mode is cleared
Timer A is set to module standby mode
Timer C module standby mode is cleared
Timer C is set to module standby mode
Timer F module standby mode is cleared
Timer F is set to module standby mode
Timer G module standby mode is cleared
Timer G is set to module standby mode
A/D converter module standby mode is cleared
A/D converter is set to module standby mode
SCI3 module standby mode is cleared
SCI3 is set to module standby mode
Rev. 8.00 Mar. 09, 2010 Page 143 of 658
REJ09B0042-0800