SH7137 Datasheet, PDF (1030/1160 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 24 Power-Down Modes
24.7 Module Standby Mode
24.7.1 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 25.3, Register States in Each Operating Mode.
24.7.2 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. 2.00 Sep. 10, 2008 Page 1004 of 1130
REJ09B0402-0200