Operation Mode; Details Of An Operation Mode; The Feature In Each Mode - Toshiba TXZ+ Series Reference Manual

1.3. Operation mode

There are NORMAL mode and a Low Power Consumption mode (IDLE, STOP1, STOP2) in this product as an
Operation mode, and it can reduce power consumption by performing mode changes according to directions for
use.

1.3.1. Details of an Operation mode

1.3.1.1. The feature in each mode

The feature in NORMAL, Low Power Consumption mode are follows.
●
NORMAL mode
It is a mode to operate a CPU core and peripheral circuits. After the reset release, operation mode is
NORMAL mode.
●
Low Power Consumption mode
Low Power Consumption mode is as following.
‒
IDLE mode
It is the mode which CPU stops.
The peripheral function should perform operation/stop by the register of each peripheral function, a clock
supply setting function, etc.
Note: CPU cannot clear the watchdog timer in IDLE mode.
‒
STOP1 mode
It is the mode which all the internal circuits also including an internal oscillator stop.
However, when an external low speed oscillator is oscillated and it shifts to the STOP1 mode, the RTC
operates.
If the STOP1 mode is released, an internal high speed oscillator1 (IHOSC1) will start, and operation mode
will return to NORMAL mode.
Please disable interrupt which is not used for STOP1 release before shifting to the STOP1 mode.
‒
STOP2 mode
It is the mode which holds a part of the function and cut off an internal electrical power source. STOP1
Consumption of electric power larger than the STOP2 mode can be held down. If the STOP2 mode is
released, the power supply will be switched on to the Main power domain, a reset sequence will be
performed, and it will return to NORMAL mode.
As for the Main power domain, it is a function which does not supply a power supply in STOP2 mode.
Before shifting to the STOP2 mode, disable an interrupt which is not made into a release STOP2, please be sure to
set up [RLMSHTDNOP]<PTKEEP> = 1 and to hold the state of each port.
An Output/Pull up holds, and input permission holds a state when it sets as a port keeping function. In addition,
external interrupt continues an input.
Clock Control and Operation Mode
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TXZ+ Family
TMPM3H Group(1)
2022-05-10
Rev. 1.3