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ST72321BXXX-AUTO Datasheet(PDF) 61 Page - STMicroelectronics

Part # ST72321BXXX-AUTO
Description  8-bit MCU for automotive with 32 to 60 Kbyte Flash/ROM, ADC, 5 timers, SPI, SCI, I2C interface
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72321BXXX-AUTO Datasheet(HTML) 61 Page - STMicroelectronics

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ST72321Bxxx-Auto
Interrupts
61/247
Otherwise, the software priority stays unchanged up to the next interrupt request (after the
IRET of the interrupt x).
Note:
During the execution of an interrupt routine, the HALT, POPCC, RIM, SIM and WFI
instructions change the current software priority up to the next IRET instruction or one of the
previously mentioned instructions.
Table 18.
Interrupt dedicated instruction set
Instruction
New description
Function/Example
I1
H
I0
N
Z
C
HALT
Entering Halt mode
1
0
IRET
Interrupt routine return
Pop CC, A, X, PC
I1
H
I0
N
Z
C
JRM
Jump if I1:0 = 11 (level 3)
I1:0 = 11 ?
JRNM
Jump if I1:0 <> 11
I1:0 <> 11 ?
POP CC
Pop CC from the Stack
Mem => CC
I1
H
I0
N
Z
C
RIM
Enable interrupt (level 0 set)
Load 10 in I1:0 of CC
1
0
SIM
Disable interrupt (level 3 set) Load 11 in I1:0 of CC
1
1
TRAP
Software trap
Software NMI
1
1
WFI
Wait for interrupt
1
0


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