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參數資料
型號: W921E880
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, PQFP80
封裝: QFP-80
文件頁數: 26/62頁
文件大小: 511K
代理商: W921E880
W921E880
- 26 -
The format of the Timer 0 Control Register is described as follows:
TM0CR REG: (ADDRESS = 020H)
(Default data = 0H)
b3
b2
b1
b0
b1
b0
Input frequency
0
0
0
1
1
0
1
1
fsys/2 Hz
fsys/256 Hz
fsys/1024 Hz
fsys/2048 Hz
Reserved
Reserved
(fsys0)
The format of the Timer 0 Low Speed Register is described as follows:
TM0LSR REG: (ADDRESS = 024H)
(Default data = 0H)
b3
b2
b1
b0
b1
b0
Input frequency (fsys1)
0
0
0
1
1
0
1
1
fsub/2 Hz
fsub/8 Hz
fsub/16 Hz
fsub/32 Hz
Reserved
Reserved
The Timer 0 Set REG. is divided into TIMER 0 MSB DATA REG.(TM0MSB REG, ADDRESS = 021H,
Default = 0FH) and TIMER 0 LSB DATA REG.(TM0LSB REG, ADDRESS = 022H, Default = 0FH).
Timer 0 will overflow when Timer 0 Set REG. goes from 00H to 0FFH. The value in the TM0MSB and
TM0LSB will be auto reloaded to the Timer 0 Set REG. when the STTM0 bit2 is set. Timer 0 will
decrease by 1 continuously during each clock transition after the timer has started.
At any time, if the STTM0 bit3 goes from 0 to 1 (disable to enable) in the timer mode, the TM0MSB
and TM0LSB will be auto reloaded to the Timer 0 Set Reg. again and the Timer 0 is restarted. Timer
0 will stop operating while the STTM0 bit3 is reset to 0.
The Timer 0 starts to count when the STTM0 REG. bit3 is set. When Timer 0 overflows, the STTM0
bit3 will be reset by hardware to stop Timer 0 if the auto-reload is disabled, but the STTM0 bit3 will
not be reset if the auto-reload is enabled.
When the Timer 0 function is performed, the watch-dog timer function will be disabled automatically.
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相關代理商/技術參數
參數描述
W921E880A 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W925C240 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Controller
W925C625 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-bit CID MICROCONTROLLER
W925E240 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Controller
W925E240FG 功能描述:IC MCU 8-BIT W/CID 100-PQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:W925 標準包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI,I²C,UART/USART 外圍設備:POR,PWM,WDT 輸入/輸出數:40 程序存儲器容量:- 程序存儲器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數據轉換器:A/D 8x10b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC(J 形引線) 包裝:帶卷 (TR)