ST7MDT2-EPB2/US STMicroelectronics, ST7MDT2-EPB2/US Datasheet - Page 36
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ST7MDT2-EPB2/US
Manufacturer Part Number
ST7MDT2-EPB2/US
Description
BOARD PROGRAMMING SGL POS ST7
Manufacturer
STMicroelectronics
Type
MCUr
Specifications of ST7MDT2-EPB2/US
Contents
Programmer Board
For Use With/related Products
ST72311, ST72124, ST72314, ST72334
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 36 of 153
- Download datasheet (3Mb)
ST72334J/N, ST72314J/N, ST72124J
POWER SAVING MODES (Cont’d)
11.3 WAIT MODE
WAIT mode places the MCU in a low power con-
sumption mode by stopping the CPU.
This power saving mode is selected by calling the
‘WFI’ instruction.
All peripherals remain active. During WAIT mode,
the I bit of the CC register is cleared, to enable all
interrupts. All other registers and memory remain
unchanged. The MCU remains in WAIT mode until
an interrupt or RESET occurs, whereupon the Pro-
gram Counter branches to the starting address of
the interrupt or Reset service routine.
The MCU will remain in WAIT mode until a Reset
or an Interrupt occurs, causing it to wake up.
Refer to
36/153
Figure
21.
Figure 21. WAIT Mode Flow-chart
Note:
1. Before servicing an interrupt, the CC register is
pushed on the stack. The I bit of the CC register is
set during the interrupt routine and cleared when
the CC register is popped.
WFI INSTRUCTION
N
INTERRUPT
Y
OR SERVICE INTERRUPT
FETCH RESET VECTOR
4096 CPU CLOCK CYCLE
OSCILLATOR
PERIPHERALS
CPU
OSCILLATOR
PERIPHERALS
CPU
OSCILLATOR
PERIPHERALS
CPU
I BIT
I BIT
I BIT
N
DELAY
RESET
Y
OFF
OFF
X
ON
ON
ON
ON
ON
ON
ON
0
0
1)
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