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ST72P63BE1M1 Datasheet(PDF) 28 Page - STMicroelectronics

Part No. ST72P63BE1M1
Description  Low speed USB 8-bit MCU family with up to 32K Flash/ROM, DFU capability, 8-bit ADC, WDG, timer, SCI & I²C
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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ST72P63BE1M1 Datasheet(HTML) 28 Page - STMicroelectronics

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ST7263BDx ST7263BHx ST7263BKx ST7263BE
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Interrupts (Cont’d)
Figure 19. Interrupt processing flowchart
Table 8. Interrupt mapping
BIT I 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
Source
block
Description
Register
label
Priority
order
Exit
from
Halt
Vector
address
RESET
Reset
N/A
Highest
Priority
Lowest
Priority
yes
FFFEh-FFFFh
TRAP
Software Interrupt
no
FFFCh-FFFDh
FLASH
Flash Start Programming Interrupt
yes
FFFAh-FFFBh
USB
End Suspend mode
ISTR
yes
FFF8h-FFF9h
1
ITi
External Interrupts
ITRFRE
FFF6h-FFF7h
2
TIMER
Timer Peripheral Interrupts
TIMSR
no
FFF4h-FFF5h
3
I²C
I²C Peripheral Interrupts
I²CSR1
FFF2h-FFF3h
I²CSR2
4
SCI
SCI Peripheral Interrupts
SCISR
FFF0h-FFF1h
5
USB
USB Peripheral Interrupts
ISTR
FFEEh-FFEFh


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