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ST7LITE49M Datasheet(PDF) 51 Page - STMicroelectronics

Part # ST7LITE49M
Description  8-bit MCU with single voltage Flash memory data EEPROM, ADC, 8/12-bit timers, and I²C interface
PDF  188 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7LITE49M Datasheet(HTML) 51 Page - STMicroelectronics

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ST7LITE49M
Interrupts
51/188
Figure 20.
Interrupt processing flowchart
Table 13.
Interrupt software priority levels
Interrupt software priority
Level
I1
I0
Level 0 (main)
Low
High
10
Level 1
0
1
Level 2
0
Level 3 (= interrupt disable)
1
1
“IRET”
RESTORE PC, X, A, CC
STACK PC, X, A, CC
LOAD I1:0 FROM INTERRUPT SW REG.
FETCH NEXT
RESET
TLI
PENDING
INSTRUCTION
I1:0
FROM STACK
LOAD PC FROM INTERRUPT VECTOR
Y
N
Y
N
Y
N
Interrupt has the same or a
lower software priority
THE INTERRUPT
STAYS PENDING
than current one
EXECUTE
INSTRUCTION
INTERRUPT



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