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參數(shù)資料
| 型號： | MC68HC05C9ECP |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | PLASTIC, DIP-40 |
| 文件頁數(shù)： | 45/106頁 |
| 文件大?。?/td> | 659K |
| 代理商： | MC68HC05C9ECP |
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Timer I/O Registers
MC68HC05C9E Advance Information Data Sheet, Rev. 0.1
Freescale Semiconductor
43
8.3.1 Timer Control Register
The timer control register (TCR), shown in Figure 8-2, performs these functions:
Enables input capture interrupts
Enables output compare interrupts
Enables timer overflow interrupts
Controls the active edge polarity of the TCAP signal
Controls the active level of the TCMP output
ICIE — Input Capture Interrupt Enable Bit
This read/write bit enables interrupts caused by an active signal on the TCAP pin. Reset clears the
ICIE bit.
1 = Input capture interrupts enabled
0 = Input capture interrupts disabled
OCIE — Output Compare Interrupt Enable Bit
This read/write bit enables interrupts caused by an active signal on the TCMP pin. Reset clears the
OCIE bit.
1 = Output compare interrupts enabled
0 = Output compare interrupts disabled
TOIE — Timer Overflow Interrupt Enable Bit
This read/write bit enables interrupts caused by a timer overflow. Reset clears the TOIE bit.
1 = Timer overflow interrupts enabled
0 = Timer overflow interrupts disabled
IEDG — Input Edge Bit
The state of this read/write bit determines whether a positive or negative transition on the TCAP pin
triggers a transfer of the contents of the timer register to the input capture register. Resets have no
effect on the IEDG bit.
1 = Positive edge (low to high transition) triggers input capture.
0 = Negative edge (high to low transition) triggers input capture.
OLVL — Output Level Bit
The state of this read/write bit determines whether a logic 1 or logic 0 appears on the TCMP pin when
a successful output compare occurs. Reset clears the OLVL bit.
1 = TCMP goes high on output compare.
0 = TCMP goes low on output compare.
Address:
$0012
Bit 7
654321
Bit 0
Read:
ICIE
OCIE
TOIE
000
IEDG
OLVL
Write:
Reset:
000000
U
0
= Unimplemented
U = Undetermined
Figure 8-2. Timer Control Register (TCR)
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