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ST7FLITE25F2M6 bảng dữ liệu(PDF) 32 Page - STMicroelectronics

tên linh kiện ST7FLITE25F2M6
Giải thích chi tiết về linh kiện  8-bit microcontroller with single voltage Flash memory, data EEPROM, ADC, Timers, SPI
PDF  166 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7FLITE25F2M6 bảng dữ liệu(HTML) 32 Page - STMicroelectronics

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Central processing unit
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Doc ID 8349 Rev 5
The stack is used to save the return address during a subroutine call and the CPU context
during an interrupt. The user may also directly manipulate the stack by means of the PUSH
and POP instructions. In the case of an interrupt, the PCL is stored at the first location
pointed to by the SP. Then the other registers are stored in the next locations as shown in
Figure 11:
●
When an interrupt is received, the SP is decremented and the context is pushed on the
stack.
●
On return from interrupt, the SP is incremented and the context is popped from the
stack.
A subroutine call occupies two locations and an interrupt five locations in the stack area.
Figure 11. Stack manipulation example
PCH
PCL
SP
PCH
PCL
SP
PCL
PCH
X
A
CC
PCH
PCL
SP
PCL
PCH
X
A
CC
PCH
PCL
SP
PCL
PCH
X
A
CC
PCH
PCL
SP
SP
Y
CALL
Subroutine
Interrupt
Event
PUSH Y
POP Y
IRET
RET
or RSP
@ 01FFh
@ 0180h
Stack higher address = 01FFh
Stack lower address =
0180h



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