參數(shù)資料
型號: MC68HC05C9AMP
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): 67/124頁
文件大?。?/td> 774K
代理商: MC68HC05C9AMP
Timer I/O Registers
MC68HC05C9A Advance Information Data Sheet, Rev. 5.1
Freescale Semiconductor
47
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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