参数资料
型号: MC68HC11A1VFU2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP64
封装: QFP-64
文件页数: 152/158页
文件大小: 3803K
代理商: MC68HC11A1VFU2
RESETS, INTERRUPTS, AND LOW POWER MODES
MOTOROLA
TECHNICAL DATA
9-13
9
Figure 9-4 Processing Flow Out of Resets (Sheet 2 of 2)
BIT I IN
CCR = 1?
2A
Y
N
ANY I-BIT
INTERRUPT
Y
N
PENDING?
FETCH OPCODE
ILLEGAL
OPCODE?
Y
N
WAI
Y
N
INSTRUCTION?
SWI
INSTRUCTION?
Y
N
RTI
INSTRUCTION?
Y
N
EXECUTE THIS
INSTRUCTION
STACK CPU
REGISTERS
ANY
N
Y
INTERRUPT
PENDING?
SET BIT I IN CCR
RESOLVE INTERRUPT
PRIORITY AND FETCH
VECTOR FOR HIGHEST
PENDING SOURCE
STACK CPU
REGISTERS
SET BIT I IN CCR
FETCH VECTOR
$FFF8, $FFF9
STACK CPU
REGISTERS
SET BIT I IN CCR
FETCH VECTOR
$FFF6, $FFF7
RESTORE CPU
REGISTERS
FROM STACK
1A
STACK CPU
REGISTERS
SEE FIGURE 9–5
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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