Renesas H8 Series Hardware Manual

Section 5 Power-Down Modes
Rev. 7.00 Mar 10, 2005 page 141 of 652
REJ09B0042-0700
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 Operation
CKSTPR1 TACKSTP 1 Timer A module standby mode is cleared
0 Timer A is set to module standby mode
TCCKSTP 1 Timer C module standby mode is cleared
0 Timer C is set to module standby mode
TFCKSTP 1 Timer F module standby mode is cleared
0 Timer F is set to module standby mode
TGCKSTP 1 Timer G module standby mode is cleared
0 Timer G is set to module standby mode
ADCKSTP 1 A/D converter module standby mode is cleared
0 A/D converter is set to module standby mode
S32CKSTP 1 SCI3 module standby mode is cleared
0 SCI3 is set to module standby mode

Renesas H8 Series Specifications

General

Brand	Renesas
Model	H8 Series
Category	Computer Hardware
Language	English