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ST52T301 Datasheet(PDF) 87 Page - STMicroelectronics

Part # ST52T301
Description  8-Bit OTP/EPROM DuaLogic] MCUs WITH ADC, UART, TIMER, TRIAC & PWM DRIVER
PDF  100 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST52T301 Datasheet(HTML) 87 Page - STMicroelectronics

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RETI
Return from Interrupt
Format:
RETI
Operation:
PC <- stack
Z <- stack
S <- stack
Description: This instruction resumes the program execution exactly at the point it was left when an in-
terrupt occurred. Z and S flag are set to the status they had when the interrupt service
routine was started.
Flags:
Z,S restored to the original setting before an interrupt occured.
Bytes:
1
Cycles:
5
Example:
If the PC stack contains the value 1123 and the program is processing an interrupt ser-
vice routine, then the instruction
RETI
10010101
causes the PC to be loaded with the value 1123 and the flags to be restored to the
status before the interrupt occurred.
87/99
ST52T301/E301



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