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參數資料
型號: W921E840
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 4-Bit Microcontroller(4位的微控制器)
中文描述: 4-BIT, EEPROM, 4 MHz, MICROCONTROLLER, PDIP40
封裝: DIP-40
文件頁數: 34/64頁
文件大小: 603K
代理商: W921E840
W921E840
- 34 -
In the pulse/period width measurement mode the measuring-data is the 1'S complement of the exact
data and the TM2 interrupt flag is set every 255 timer clock past or the 2nd trigger condition occurs.
So the measured pulse/period width is (255(N 1) TM2)*T
TM2
is the 1'S complement of timer2 register,
T
is the period of timer 2 clock. The special function
input or output is from or to P5.1.
,
N
is the number of interrupt flag occurs,
6.11.4 TM3
TM3 can perform the following functions:
1. 2 to19 order divider
2. Auto-reload timer
System
Clock
11-bit Prescaler
TM3 Control
Register
TM0 Interrupt
Logic
TM3 Control
Logic
Interrupt Control
Register
TM3 Set Register
(8 bits)
8 Order Divider
f
TM3
f
SYS
MUX3
TM3CR register: (address = 02FH, default data = 0H)
b3
b2
b1
b0
b1 b0
0
0
0
1
1
0
1
1
fsys/2 Hz
fsys/4 Hz
fsys/8 Hz
fsys/16 Hz
b3 b2
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
1
0
0
0
0
1
1
0
1
1
1
1
0
0
0
0
0
1
1
0
fsys/32 Hz
fsys/64 Hz
fsys/128 Hz
fsys/256 Hz
fsys/512 Hz
fsys/1024 Hz
fsys/2048 Hz
Input frequency (f )
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