Mode State Transition; Idle Mode Transition Flow; Figure 1.2 Mode State Transition - Toshiba TXZ+ Series Reference Manual

1.3.2. Mode State Transition

STOP1 Mode
(CPU stops except
some peripheral
functions)
Note1: Warm up is required at returning. A warm up time must be set in the previous mode (NORMAL mode)
before entering to STOP1 mode.
Note2: When the CPU returns from STOP2 mode, the CPU branches to the interrupt service routine triggered
by reset. When the CPU returns from STOP1 mode, the CPU branches to the interrupt service routine
triggered by interrupt events.

1.3.2.1. IDLE mode transition flow

Set up the following procedure at switching to IDLE mode.
Because IDLE mode is released by an interrupt, set the interrupt before switching to IDLE mode. For the
interrupts that can be used to release the IDLE mode, refer to "1.3.3.1. The release source of a Low Power
Consumption mode". Disables unused interrupts and unavailable interrupts for release IDLE mode.
1 [SIWDxEN]<WDTE> = 0
2 [SIWDxCR]<WDCR[7:0]>= 0xB1
3 [FCSR0]<RDYBSY> is read
4 [CGSTBYCR]<STBY[1:0]> = 00
5 [CGSTBYCR]<STBY[1:0]> is read
6 WFI command execution
Note2
( )
Interrupt
NORMAL Mode
Instruction
(Note1)
Instruction
(Operating peripheral
function can be selected)

Figure 1.2 Mode State Transition

Switching procedure (from NORMAL mode)
Clock Control and Operation Mode
Reset
After reset,
the high-speed
oscillator1(IHOSC1)
oscillates.
Instruction
Interrupt
IDLE Mode
(CPU stops)
Disable SIWDT
Disable SIWDT.
It waits until Flash will be in a Ready state (= 1).
Low Power Consumption mode selection is set to IDLE.
Confirm "00" to written to the register at the step 4.
Switch to IDLE.
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TXZ+ Family
TMPM3H Group(1)
Reset
(The backup domain)
Interrupt
(Note2)
STOP2 Mode
(CPU stops with shutdown
internal power supply
except some peripheral
functions
2022-05-10
Rev. 1.3