ST7263 STMICROELECTRONICS [STMicroelectronics], ST7263 Datasheet - Page 21

• Manufacturer Part Number: ST7263
• Description: LOW SPEED USB 8-BIT MCU FAMILY with up to 16K MEMORY, up to 512 BYTES RAM, 8-BIT ADC, WDG, TIMER, SCI & I2C
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

INTERRUPTS (Cont’d)
Figure 15. Interrupt Processing Flowchart
Table 7. Interrupt Mapping
N°
1
2
3
4
5
FROM RESET
Source
RESET
TIMER
Block
TRAP
USB
USB
SCI
I
ITi
2
C
Reset
Software Interrupt
End Suspend Mode
External Interrupts
Timer Peripheral Interrupts
I
SCI Peripheral Interrupts
USB Peripheral Interrupts
2
EXECUTE INSTRUCTION
C Peripheral Interrupts
Description
RESTORE PC, X, A, CC FROM STACK
THIS CLEARS I BIT BY DEFAULT
FETCH NEXT INSTRUCTION
N
BIT I SET
IRET
Y
Y
Register
ITRFRE
I2CSR1
I2CSR2
TIMSR
SCISR
Label
ISTR
ISTR
N/A
N
LOAD PC FROM INTERRUPT VECTOR
Priority
Highest
Lowest
Priority
Priority
Order
N
STACK PC, X, A, CC
INTERRUPT
SET I BIT
HALT
from
Exit
yes
yes
no
no
Y
FFFCh-FFFDh
FFFAh-FFFBh
FFFEh-FFFFh
FFF8h-FFF9h
FFF6h-FFF7h
FFF4h-FFF5h
FFF2h-FFF3h
FFF0h-FFF1h
Address
Vector
ST7263
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