参数资料
型号: ST7263BK1B/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32
封装: 0.400 INCH, LEAD FREE, SHRINK, PLASTIC, DIP-32
文件页数: 58/140页
文件大小: 1423K
代理商: ST7263BK1B/XXX
ST7263B
24/140
INTERRUPTS (Cont’d)
Figure 18. 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
IC
IC Peripheral Interrupts
ICSR1
FFF2h-FFF3h
ICSR2
4
SCI
SCI Peripheral Interrupts
SCISR
FFF0h-FFF1h
5
USB
USB Peripheral Interrupts
ISTR
FFEEh-FFEFh
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