SH7146 Datasheet, PDF (902/1022 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 22 Power-Down Modes
22.7 Module Standby Mode
22.7.1 Transition to Module Standby Mode
Setting the MSTP bits in the standby control registers (STBCR2 to STBCR5) to 1 halts the supply
of clocks to the corresponding on-chip peripheral modules. This function can be used to reduce the
power consumption in normal mode.
Do not access registers of an on-chip peripheral module which has been set to enter module
standby mode. For details on the states of on-chip peripheral module registers in module standby
mode, refer to section 23.3, Register States in Each Operating Mode.
22.7.2 Canceling Module Standby Function
The module standby function can be canceled by clearing the MSTP bits in STBCR2 to STBCR5
to 0. The module standby function can be canceled by a power-on reset for modules whose MSTP
bit has an initial value of 0.
Rev. 3.00 May 17, 2007 Page 858 of 974
REJ09B0229-0300