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參數(shù)資料
| 型號： | MC68HC05G3 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | QFP-80 |
| 文件頁數(shù)： | 88/128頁 |
| 文件大?。?/td> | 290K |
| 代理商： | MC68HC05G3 |
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Page 52
MOTOROLA
Section 5: RESET/ INTERRUPT STRUCTURE
MC68HC05G3 (705G4) Specification Rev. 1.1
5.2.9
INTERRUPT STATUS REGISTER (INTSR)
READ:
anytime
(Bits 3-0 are write-only bits and always read as zero.)
WRITE:
anytime
(Bits 7-4 are read-only bits and write has no effect.)
IRQ1F
IRQ1 Interrupt Flag
When IRQ1S = 0, the falling edge or low level at IRQ1 pin sets IRQ1F. When
IRQ1S = 1, only the falling edge at the pin sets IRQ1F bit. If IRQ1E bit and this
bit are set, interrupt is generated. This bit is a read-only bit and cleared by writing
a one to the RIRQ1 bit. Reset clears this bit.
IRQ2F
IRQ2 Interrupt Flag
When IRQ2S = 0, the falling edge or low level at IRQ2 pin sets IRQ1F. When
IRQ2S = 1, only the falling edge at the pin sets IRQ2F bit. If IRQ1E bit and this
bit are set, interrupt is generated. This bit is a read-only bit and is cleared by
writing a one to the RIRQ2 bit. Reset clears this bit.
BIT 5
Reserved
This bit is not used and always read as zero.
KWIF
Key Wakeup Interrupt Flag
When KWIE
x bit in the KWIEN register is set, the falling edge at KWIx pin sets
KWIF bit. If KWIE bit and this bit are set, interrupt is generated. This bit is a read-
only bit and clearing KWIF is accomplished by writing a one to the RKWIF bit.
Reset clears this bit.
RIRQ1
Reset IRQ1 Flag
The RIRQ1 bit is a write-only bit and always read as zero. Writing a one to this
bit clears IRQ1F bit and writing zero to this bit has no effect.
RIRQ2
Reset IRQ2 Flag
The RIRQ2 bit is a write-only bit and always read as zero. Writing a one to this
bit clears the IRQ2F bit and writing zero to this bit has no effect.
BIT 1
Reserved
This bit is not used and always read as zero.
RKWIF
Reset KWI Flag
The RKWIF bit is a write-only bit and always read as zero. Writing a one to this
bit clears KWIF bit and writing zero to this bit has no effect.
IRQ1F
$0009
IRQ2F
0
KWIF RIRQ1 RIRQ2
0
RKWIF
INTSR
B7
B6
B5
B4
B3
B2
B1
B0
00000000
RESET:
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