HD6473887 Datasheet, PDF (133/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

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
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
S1CKSTP 1 SCI1 module standby mode is cleared
0 SCI1 is set to module standby mode
S32CKSTP 1 SCI3-2 module standby mode is cleared
0 SCI3-2 is set to module standby mode
S31CKSTP 1 SCI3-1 module standby mode is cleared
0 SCI3-1 is set to module standby mode
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