參數資料
型號: MC68HC05E16CFU
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 16256 bytes of user ROM, 320bytes of EPROM and 352 bytes of RAM
中文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP64
封裝: QFP-64
文件頁數: 33/96頁
文件大小: 3045K
代理商: MC68HC05E16CFU
MC68HC05SR3
Freescale
5-3
RESETS AND INTERRUPTS
5
5.2.1
Non-maskable Software Interrupt (SWI)
The software interrupt (SWI) is an executable instruction and a non-maskable interrupt: it is
execute regardless of the state of the I-bit in the CCR. If the I-bit is zero (interrupt enabled), SWI
is executed after interrupts that were pending when the SWI was fetched, but before interrupts
generated after the SWI was fetched. The SWI interrupt service routine address is specified by
the contents of memory locations $1FFC and $1FFD.
Figure 5-1 Interrupt Stacking Order
Table 5-1 Reset/Interrupt Vector Addresses
Register
Flag Name
Interrupt
CPU Interrupt
Vector Address
Priority
Reset
RESET
$1FFE-$1FFF
Software
SWI
$1FFC-$1FFD
External Interrupt
IRQ
$1FFA-$1FFB
External Interrupt 2
IRQ2
$1FF8-$1FF9
TCR
TIF
Timer Overflow
TIF
$1FF6-$1FF7
Keyboard
KBI
$1FF4-$1FF5
CONDITION CODE REGISTER
ACCUMULATOR
INDEX REGISTER
PROGRAM COUNTER (HIGH BYTE)
PROGRAM COUNTER (LOW BYTE)
$00C0 (BOTTOM OF STACK)
$00C1
$00C2
$00FD
$00FE
$00FF (TOP OF STACK)
UNSTACKING
1
2
3
4
5
4
3
2
1
STACKING
ORDER
highest
lowest
TPG
37
05SR3.Book Page 3 Thursday, August 4, 2005 1:08 PM
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