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4.5
Module Stop Mode
4.5.1
Module Stop Mode
Module stop mode can be set for individual on-chip supporting modules.
When the corresponding MSTP bit in MSTPCR is set to 1, module operation stops at the end of
the bus cycle and a transition is made to module stop mode. The CPU continues operating
independently.
Table 4.4 shows MSTP bits and the on-chip supporting modules.
When the corresponding MSTP bit is cleared to 0, module stop mode is cleared and the module
starts operating again at the end of the bus cycle. In module stop mode, the internal states of
modules other than the SCI1, A/D converter, Timer X1, and Servo circuit, are retained.
After reset release, all modules are in module stop mode.
When an on-chip supporting module is in module stop mode, read/write access to its registers is
disabled.
Table 4.4
MSTP Bits and Corresponding On-Chip Supporting Modules
Register
Bit
Module
MSTP15
Timer A
MSTP14
Timer B
MSTP13
Timer J
MSTP12
Timer L
MSTP11
Timer R
MSTP10
Timer X1
MSTP9
MSTPCRH
MSTP8
Serial communication interface 1 (SCI1)
MSTP7
Serial communication interface 2 (SCI2)
MSTP6
I
2
C bus interface (IIC)
MSTP5
14-bit PWM
MSTP4
8-bit PWM
MSTP3
MSTP2
A/D converter
MSTP1
Servo circuit, 12-bit PWM
MSTPCRL
MSTP0
Содержание Hitachi H8S/2191
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