参数资料
型号: MC68HC705C9ACFB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封装: QFP-44
文件页数: 68/118页
文件大小: 750K
代理商: MC68HC705C9ACFB
Timer I/O Registers
MC68HC05C9A Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
53
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
Figure 8-2. Timer Control Register (TCR)
ICIE — Input Capture Interrupt Enable Bit
This read/write bit enables interrupts caused by an active signal on the TCAP pin. Resets clear 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. Resets clear 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 clear 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. Resets clear the OLVL bit.
1 = TCMP goes high on output compare
0 = TCMP goes low on output compare
$0012
Bit 7
654321
Bit 0
Read:
ICIE
OCIE
TOIE
000
IEDG
OLVL
Write:
Reset:
000000
U
0
= Unimplemented
U = Undetermined
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MC68HC705C9ACPE 制造商:Freescale Semiconductor 功能描述: