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參數資料
型號: MC68HC11A8BCFU2
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: HCMOS Single-Chip Microcontroller
中文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP64
封裝: QFP-64
文件頁數: 79/158頁
文件大?。?/td> 776K
代理商: MC68HC11A8BCFU2
MC68HC11A8
TECHNICAL DATA
PROGRAMMABLE TIMER, RTI, AND PULSE ACCUMULATOR
MOTOROLA
8-9
8
PAMOD — Pulse Accumulator Mode
0 = External event counting
1 = Gated time accumulation
PEDGE — Pulse Accumulator Edge Control
This bit has different meanings depending on the state of the PAMOD bit.
Bits 3-2 — Not Implemented
These bits always read zero.
RTR1 and RTR0 — RTI Interrupt Rate Selects
These two bits select one of four rates for the real time periodic interrupt circuit (see
Table 8-1
). Reset clears these two bits and after reset, a full RTI period elapses before
the first RTI interrupt.
PAMOD
0
0
1
1
PEDGE
0
1
0
1
Action on Clock
PAI Falling Edge Increments the Counter
PAI Rising Edge Increments the Counter
A zero on PAI Inhibits Counting
A one on PAI Inhibits Counting
Table 8-1 Real Time Interrupt Rate versus RTR1 and RTR0
XTAL =
12.0 MHz
8.192 ms
XTAL =
2
23
3.91 ms
XTAL =
8.0 MHz
4.10 ms
XTAL =
4.9152 MHz
6.67 ms
XTAL =
4.0 MHz
8.19 ms
XTAL =
3.6864 MHz
8.89 ms
RTR1
0
RTR0
0
Rate
2
13
÷
E
2
14
÷
E
2
15
÷
E
2
16
÷
E
E =
0
1
16.384 ms
7.81 ms
8.19 ms
13.33 ms
16.38 ms
17.78 ms
1
0
32.768 ms
15.62 ms
16.38 ms
26.67 ms
32.77 ms
35.56 ms
1
1
65.536 ms
31.25 ms
32.77 ms
53.33 ms
65.54 ms
71.11 ms
3.0 MHz
2.1 MHz
2.0 MHz
1.2288 MHz
1.0 MHz
921.6 kHz
相關PDF資料
PDF描述
MC68HC11A8BCP2 HCMOS Single-Chip Microcontroller
MC68HC11A8BMP2 HCMOS Single-Chip Microcontroller
MC68HC11A8BVP2 HCMOS Single-Chip Microcontroller
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相關代理商/技術參數
參數描述
MC68HC11A8BCP2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HCMOS Single-Chip Microcontroller
MC68HC11A8BMP2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HCMOS Single-Chip Microcontroller
MC68HC11A8BVP2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HCMOS Single-Chip Microcontroller
MC68HC11A8FN 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-Bit Microcontrollers
MC68HC11A8FN1 制造商:Motorola Inc 功能描述:
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