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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: 28/57頁
文件大小: 372K
代理商: W921E880A
W921E880A/W921C880
- 28 -
The format of the Timer 1 Control Register is shown as follows:
TM1CR REG: (ADDRESS = 025H)
(Default data = 0H)
b3
b2
b1
b0
b1 b0
Input frequency (fsys0)
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
The Timer 1 Set REG. is divided into TIMER 1 MSB DATA REG.(TM1MSB REG, ADDRESS = 026H,
Default = 0FH) and TIMER 1 LSB DATA REG. (TM1LSB REG, ADDRESS = 027H, Default = 0FH).
The Timer 1 READ REG. is divided into TIMER 1 READ ONLY MSB DATA REG. (TM1RM REG,
ADDRESS = 01CH, Default = 0FH) and TIMER 1 READ ONLY LSB DATA REG. (TM1RL REG,
ADDRESS = 01DH, Default = 0FH).
The format of the Status of Timer 1 Register is shown as follows:
STTM1 REG: (ADDRESS = 028H)
(Default data = 0H)
b3
b2
b1
b0
0:Timer 1 stop
1:Timer 1 start
0:
1:
Timer 1 normal function select
Special function select
Reserved
0:Timer 1 auto-reload disable
1:Timer 1 auto-reload enable
If Timer 1 is in the timer mode, the Timer 1 will underflow when it goes from 00H to 0FFH. The value
in the TM1MSB and TM1LSB will be auto reloaded to the Timer 1 Set REG. when the STTM1 bit2 is
set. Timer 1 will decrease by 1 continuously at each clock transition after the timer has started.
At any time the STTM1 bit3 goes from 0 to 1 (disable to enable), the TM1MSB and TM1LSB will be
auto reloaded to the Timer 1 Set Reg. again and Timer 1 is restarted. Timer 1 will stop operating
while the STTM1 bit3 is reset to 0.
相關PDF資料
PDF描述
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W921F840 4-Bit Microcontroller(4位的微控制器)
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