參數(shù)資料
型號: W921E400A
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位微控制器)
中文描述: 4-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP28
封裝: DIP-28
文件頁數(shù): 28/53頁
文件大小: 394K
代理商: W921E400A
W921E400A/W921C400
- 28 -
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 measuerd pulse/peirod width is
(
(
)
255
1
N
+
TM
2
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.
6.10.3 TM3
TM3 can perform the following functions:
1. 2 to19 order divider
2. Auto-reload timer
)*
2
TM
T
,
N
is the number of interrupt flag occurs,
System
Clock
1/4
11-bit Prescaler
TM3 Control
Register
TM3 Interrupt
Logic
TM3 Control
Logic
Interrupt Control
Register
TM3 Set Register
(8 bits)
8 Order Divider
f
TM3
f
SYS
High Speed
Clock
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 )
The TM3 set register is divided into TM3 MSB data register (TM3MSB register, address = 030H,
default = 0FH) and TM3 LSB data register (TM3LSB register, address = 031H, default = 0FH).
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