参数资料
型号: MC68HC11FC0CFU5
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: Technical Summary 8-Bit Microcontroller
中文描述: 8-BIT, 6 MHz, MICROCONTROLLER, PQFP64
封装: QFP-64
文件页数: 63/74页
文件大小: 513K
代理商: MC68HC11FC0CFU5
MOTOROLA
MC68HC11F1/FC0
66
MC68HC11FTS/D
Bit 3 — Not implemented. Reads always return zero and writes have no effect.
U = Unaffected by reset
This eight-bit read/write register contains the count of external input events at the PAI input, or the ac-
cumulated count. The PACNT is readable even if PAI is not active in gated time accumulation mode.
The counter is not affected by reset and can be read or written at any time. Counting is synchronized
to the internal PH2 clock so that incrementing and reading occur during opposite half cycles.
Table 33 Pulse Accumulator Edge Control
PAMOD
PEDGE
Action on Clock
0
PAI falling edge increments the counter.
0
1
PAI rising edge increments the counter.
1
0
A zero on PAI inhibits counting.
1
A one on PAI inhibits counting.
PACNT — Pulse Accumulator Count
$x027
Bit 7
6
5
4
3
2
1
Bit 0
Bit 7
6
5
4
3
2
1
Bit 0
RESET:
U
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