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ST7LITE0X Datasheet(PDF) 31 Page - STMicroelectronics

Part # ST7LITE0X
Description  8-BIT MICROCONTROLLER WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7LITE0X Datasheet(HTML) 31 Page - STMicroelectronics

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INTERRUPTS (Cont’d)
Figure 17. Interrupt Processing Flowchart
Table 6. Interrupt Mapping
I BIT SET?
Y
N
IRET?
Y
N
FROM RESET
LOAD PC FROM INTERRUPT VECTOR
STACK PC, X, A, CC
SET I BIT
FETCH NEXT INSTRUCTION
EXECUTE INSTRUCTION
THIS CLEARS I BIT BY DEFAULT
RESTORE PC, X, A, CC FROM STACK
INTERRUPT
Y
N
PENDING?
N°
Source
Block
Description
Register
Label
Priority
Order
Exit
from
HALT
Address
Vector
RESET
Reset
N/A
Highest
Priority
Lowest
Priority
yes
FFFEh-FFFFh
TRAP
Software Interrupt
no
FFFCh-FFFDh
0
Not used
FFFAh-FFFBh
1
ei0
External Interrupt 0
yes
FFF8h-FFF9h
2
ei1
External Interrupt 1
FFF6h-FFF7h
3
ei2
External Interrupt 2
FFF4h-FFF5h
4
ei3
External Interrupt 3
FFF2h-FFF3h
5
Not used
FFF0h-FFF1h
6
Not used
FFEEh-FFEFh
7
SI
AVD interrupt
SICSR
no
FFECh-FFEDh
8
AT TIMER
AT TIMER Output Compare Interrupt
PWM0CSR
no
FFEAh-FFEBh
9
AT TIMER Overflow Interrupt
ATCSR
yes
FFE8h-FFE9h
10
LITE TIMER
LITE TIMER Input Capture Interrupt
LTCSR
no
FFE6h-FFE7h
11
LITE TIMER RTC Interrupt
LTCSR
yes
FFE4h-FFE5h
12
SPI
SPI Peripheral Interrupts
SPICSR
yes
FFE2h-FFE3h
13
Not used
FFE0h-FFE1h
1


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