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參數(shù)資料
| 型號： | MC68HC11EA9VFN3 |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PQCC52 |
| 封裝： | PLASTIC, LCC-52 |
| 文件頁數(shù)： | 40/58頁 |
| 文件大?。?/td> | 583K |
| 代理商： | MC68HC11EA9VFN3 |
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MC68HC11EA9
MOTOROLA
MC68HC11EA9TS/D
45
PEDGE — Pulse Accumulator Input Edge Select
0 = Interrupts from edges on PAI pin are disabled
1 = Edges detected on PAI pin generate interrupts (rising or falling, depending on configuration)
Bit 3 — Not Implemented
Always reads zero
I4/O5 — Input Capture 4/Output Compare 5 Select
Refer to 7.2 Main Timer.
RTR[1:0] — Timer Prescaler Select
Refer to 7.3 Real-Time Interrupt.
Bits [7:4] can be written at any time. PR[1:0] can only be written once in the first 64 cycles after reset in
normal modes (SMOD = 0). In special modes (SMOD = 1) PR[1:0] can be written any time.
TOI — Timer Overflow Interrupt Enable
Refer to 7.2 Main Timer.
RTII — Real-Time Interrupt Enable
Refer to 7.3 Real-Time Interrupt.
PAOVI — Pulse Accumulator Overflow Interrupt Enable
If the PAOVI enable bit is set when the pulse accumulator counter register (PACNT) changes from
$FFFF to $0000 an interrupt is generated.
0 = PCNT overflow interrupts are disabled
1 = Interrupts are generated each time PCNT rolls over to $0000
PAII — Pulse Accumulator Input Edge Interrupt Enable
If the PAII enable bit is set when an edge (rising or falling, depending on configuration) is detected on
the pulse accumulator input pin (PA7/PAI), an interrupt is generated.
0 = Interrupts from edges on PAI pin are disabled
1 = Edges detected on PAI pin generate interrupts (rising or falling, depending on configuration)
Bits [3:2] — Not Implemented
Always read zero
PR[1:0] — Timer Prescaler Select
Refer to 7.2 Main Timer.
PACNT — Pulse Accumulator Counter
$1027
BIT 7
654321
BIT 0
BIT 7
654321
BIT 0
Can be read and written, unaffected by reset.
TMSK2 — Timer Interrupt Mask 2
$1024
BIT 7
654321
BIT 0
TOI
RTII
PAOVI
PAII
—
PR1
PR0
RESET:
00000000
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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