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參數資料
型號: W921E880A
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, PQFP80
封裝: QFP-80
文件頁數: 29/57頁
文件大小: 372K
代理商: W921E880A
W921E880A/W921C880
Publication Release Date: September 1998
- 29 -
Revision A2
The Timer 1 starts to count when the STTM1 REG. bit3 is set. When Timer 1 underflows, the STTM0
bit3 will be reset by hardware to stop Timer 1 if the auto-reload is disabled, but the STTM1 bit3 will
not be reset if the auto-reload is enabled.
When the Timer 1 function is performed, the special function will be disabled automatically. The
special function input or output is from or to P5.0.
The format of the Timer 1 event counter condition is shown as follows
TGTM1 REG: (ADDRESS = 029H)
(Default data = 0H)
b3
b2
b1
b0
0: Event counter is falling edge trigger
1: Event counter is rising edge trigger
0: Special function work as event counter
1: Special function work as arbitrary
waveform generator
0: Arbitrary waveform type 0
1: Arbitrary waveform type 1
Reserved
TM2
can perform the following functions:
1. 2
19 order divider
2. Auto-reload timer.
3. Arbitrary waveform generator.
4. Pulse/Period width measurement function
Period/Pulse Width
Measurement
TM2 Interrupt
Logic
Interrupt Control
Register
TM2 Set Register
(8 bits)
8 Order Divider
System
Clock
1/4
11-bit Prescaler
TM2 Read
Register
Arbitrary
Waveform
Generator
TM2 Control
Register
f
TM2
f
SYS
Port 5.1
TM2 Control Logic
High Speed
Clock
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