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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)： | 8/128頁 |
| 文件大?。?/td> | 290K |
| 代理商： | MC68HC05G3 |
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Page 95
Section 8: TIMER SYSTEM
MOTOROLA
MC68HC05G3 (705G4) Specification Rev. 1.1
8.5.2
TIMER STATUS REGISTER 2 (TSR2)
READ:
anytime
(Bits 3-2 are write-only bits and always read as zero.)
WRITE:
anytime
(Bits 7-6 are read-only bits and write has no effect.)
TI2F
Timer Input 2 (EVI) Interrupt Flag
In event mode, the event edge sets TI2F and in gated time accumulation mode
the trailing edge of the gate signal at the EVI input pin sets TI2F. When TI2IE bit
and this bit are set, interrupt is generated. This bit is a read-only bit and writes
have no effect. The TI2F is cleared by writing a one to the RTI2F bit or by reset.
OC2F
Compare 2 Interrupt Flag
The OC2F bit is set when a compare match is detected between counter 2 and
OC2 register. If the OC2IE bit and this bit are set, interrupt is generated. This bit
is a read-only bit and writes have no effect. The OC2F is cleared by writing a one
to the ROC2F bit or by reset.
BITS 5-4
Reserved
These bits are not used and always read as zero.
RTI2F
Reset Timer Input 2 Flag
The RTI2F bit is a write-only bit and always read as zero. Writing one to this bit
clears TI2F bit and writing a zero to this bit has no effect.
ROC2F
Reset Output Compare 2 Flag
The ROC2F bit is a write-only bit and always read as zero. Writing one to this bit
clears the OC2F bit and writing a zero to this bit has no effect.
BITS 1-0
Reserved
These bits are not used and always read as zero.
TI2F
$001D
OC2F
0
RTI2F ROC2F
0
TSR2
B7
B6
B5
B4
B3
B2
B1
B0
00000000
RESET:
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