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ST7263BDx Datasheet(PDF) 42 Page - STMicroelectronics

No. de pieza ST7263BDx
Descripción Electrónicos  Low speed USB 8-bit MCU family with up to 32 KB Flash/ROM, DFU capability, 8-bit ADC, WDG, timer, SCI and I²C
PDF  186 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7263BDx Datasheet(HTML) 42 Page - STMicroelectronics

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Power saving modes
ST7263Bxx
42/186
Doc ID 7516 Rev 8
The MCU will remain in Wait mode until a Reset or an interrupt occurs, causing it to wake
up. Refer to Figure 21.
Related documentation
AN 980: ST7 Keypad Decoding Techniques, Implementing Wakeup on Keystroke
AN1014: How to Minimize the ST7 Power Consumption
AN1605: Using an active RC to wakeup the ST7LITE0 from power saving mode
Figure 21.
Wait mode flowchart
1.
Before servicing an interrupt, the CC register is pushed on the stack. The I-Bit is set during the interrupt
routine and cleared when the CC register is popped.
WFI INSTRUCTION
RESET
INTERRUPT
Y
N
N
Y
CPU CLOCK
OSCILLATOR
PERIPH. CLOCK
I-BIT
ON
ON
CLEARED
OFF
CPU CLOCK
OSCILLATOR
PERIPH. CLOCK
I-BIT
ON
ON
SET
ON
FETCH RESET VECTOR
OR SERVICE INTERRUPT
4096 CPU CLOCK
CYCLES DELAY
IF RESET



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