Peripheral Module Pin High Impedance Control - Hitachi SH7750 Programming Manual

Bit 1—Module Stop 1 (MSTP1): Specifies stopping of the clock supply to the realtime clock
(RTC) among the on-chip peripheral modules. The clock supply to the RTC is stopped when the
MSTP1 bit is set to 1. When the clock supply is stopped, RTC registers cannot be accessed but the
counters continue to operate.
Bit 1: MSTP1
0
1
Bit 0—Module Stop 0 (MSTP0): Specifies stopping of the clock supply to serial communication
interface channel 1 (SCI) among the on-chip peripheral modules. The clock supply to the SCI is
stopped when the MSTP0 bit is set to 1.
Bit 0: MSTP0
0
1
9.2.2

Peripheral Module Pin High Impedance Control

When bit 6 in the standby control register (STBCR) is set to 1, peripheral module related pins go
to the high-impedance state in standby mode.
• Relevant Pins
SCI related pins
DMA related pins
• Other Information
High impedance control is not performed when the above pins are used as port output pins.
Description
RTC operates
RTC clock supply is stopped
Description
SCI operates
SCI clock supply is stopped
MD0/SCK
MD7/TXD
CTS2
DACK0
DACK1
MD1/TXD2
MD8/RTS2
DRAK0
DRAK1
Rev. 2.0, 03/99, page 181 of 396
(Initial value)
(Initial value)