參數(shù)資料
型號： AT89C51ID2-SLRIM
廠商： Atmel
文件頁數(shù)： 11/157頁
文件大小： 0K
描述： IC MCU FLASH 8051 64K 5V 44-PLCC
標準包裝： 1
系列： 89C
核心處理器： 8051
芯體尺寸： 8-位
速度： 60MHz
連通性： I²C，SPI，UART/USART
外圍設(shè)備： POR，PWM，WDT
輸入/輸出數(shù)： 34
程序存儲器容量： 64KB（64K x 8）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量： 2K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 44-LCC（J 形引線）
包裝： 剪切帶 (CT)
其它名稱： AT89C51ID2SLRIMCT
108
AT89C51ID2
4289C–8051–11/05
Table 83. WDTPRG Register
WDTPRG - Watchdog Timer Out Register (0A7h)
Reset value = XXXX X000
WDT During Power Down
and Idle
In Power Down mode the oscillator stops, which means the WDT also stops. While in
Power Down mode the user does not need to service the WDT. There are 2 methods of
exiting Power Down mode: by a hardware reset or via a level activated external inter-
rupt which is enabled prior to entering Power Down mode. When Power Down is exited
with hardware reset, servicing the WDT should occur as it normally should whenever the
AT89C51ID2 is reset. Exiting Power Down with an interrupt is significantly different. The
interrupt is held low long enough for the oscillator to stabilize. When the interrupt is
brought high, the interrupt is serviced. To prevent the WDT from resetting the device
while the interrupt pin is held low, the WDT is not started until the interrupt is pulled high.
It is suggested that the WDT be reset during the interrupt service routine.
To ensure that the WDT does not overflow within a few states of exiting of powerdown, it
is better to reset the WDT just before entering powerdown.
In the Idle mode, the oscillator continues to run. To prevent the WDT from resetting the
AT89C51ID2 while in Idle mode, the user should always set up a timer that will periodi-
cally exit Idle, service the WDT, and re-enter Idle mode.
76
543
210
-
S2
S1
S0
Bit
Number
Bit
Mnemonic Description
7-
Reserved
The value read from this bit is undetermined. Do not try to set this bit.
6-
5-
4-
3-
2S2
WDT Time-out select bit 2
1S1
WDT Time-out select bit 1
0S0
WDT Time-out select bit 0
S2S1 S0
Selected Time-out
00
0 (214 - 1) machine cycles, 16. 3 ms @ F
OSCA =12 MHz
00
1 (215 - 1) machine cycles, 32.7 ms @ F
OSCA=12 MHz
01
0 (2
16 - 1) machine cycles, 65. 5 ms @ F
OSCA=12 MHz
01
1 (217 - 1) machine cycles, 131 ms @ F
OSCA=12 MHz
10
0 (218 - 1) machine cycles, 262 ms @ F
OSCA=12 MHz
10
1 (2
19 - 1) machine cycles, 542 ms @ F
OSCA=12 MHz
11
0 (220 - 1) machine cycles, 1.05 s @ F
OSCA=12 MHz
11
1 (221 - 1) machine cycles, 2.09 s @ F
OSCA=12 MHz
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AT89C51ID2-SLRUM 功能描述:8位微控制器 -MCU C51ID2 64K FLASH TWI 32KHz 5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT89C51ID2-SLSIM 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Flash Microcontroller
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