參數(shù)資料
型號: MC68HC11D0CFNE3R
廠商: Freescale Semiconductor
文件頁數(shù): 5/124頁
文件大?。?/td> 0K
描述: MCU 8-BIT 192 RAM 3MHZ 44-PLCC
標準包裝: 450
系列: HC11
核心處理器: HC11
芯體尺寸: 8-位
速度: 3MHz
連通性: SCI,SPI
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 26
程序存儲器類型: ROMless
RAM 容量: 192 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 帶卷 (TR)
TIMING SYSTEM
9-16
TECHNICAL DATA
Figure 9-3 Pulse Accumulator
Pulse accumulator control bits are also located within two timer registers, TMSK2 and
TFLG2, as described in the following paragraphs.
Table 9-3 Pulse Accumulator Timing
Common XTAL Frequencies
Selected Crystal
4.0 MHz
8.0 MHz
12.0 MHz
CPU Clock
(E)
1.0 MHz
2.0 MHz
3.0 MHz
Cycle Time
(1/E)
1000 ns
500 ns
333 ns
Pulse Accumulator (in Gated Mode)
(E/26)
(E/214)
1 count -
overflow -
64.0 s
16.384 ms
32.0 s
8.192 ms
21.33 s
5.461 ms
PACNT
8-BIT COUNTER
2:1
MUX
PA7/
ENABLE
OVERFLOW
1
2
INTERRUPT
REQUESTS
INTERNAL
DATA BUS
INPUT BUFFER
&
EDGE DETECTION
PACTL
TFLG2
TMSK2
PA
O
VI
PA
II
DDRA7
PAEN
PAM
O
D
PEDG
E
PA
O
VF
PA
IF
11 PULSE ACC BLOCK
OUTPUT
BUFFER
PAI EDGE
PAEN
E ÷ 64 CLOCK
(FROM MAIN TIMER)
PAI/OC1
FROM
MAIN TIMER
OC1
DISABLE
FLAG SETTING
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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