参数资料
| 型号： | AT80C51RD2-SLRUM |
| 厂商： | Atmel |
| 文件页数： | 55/81页 |
| 文件大小： | 0K |
| 描述： | IC MCU 80C51 HI PERFORM 44PLCC |
| 产品培训模块： | MCU Product Line Introduction |
| 标准包装： | 1 |
| 系列： | 80C |
| 核心处理器： | 8051 |
| 芯体尺寸： | 8-位 |
| 速度： | 40MHz |
| 连通性： | UART/USART |
| 外围设备： | POR，PWM，WDT |
| 输入/输出数： | 32 |
| 程序存储器类型： | ROMless |
| RAM 容量： | 1K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 44-LCC（J 形引线） |
| 包装： | 标准包装 |
| 其它名称： | AT80C51RD2-SLRUMDKR |
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59
4113D–8051–01/09
AT80C51RD2
Table 15-2.
WDTPRG Register
WDTPRG - Watchdog Timer Out Register (0A7h)
Reset Value = XXXX X000
15.2
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 interrupt which is enabled prior
to entering Power-down mode. When Power-down is exited with hardware reset, servicing the
WDT should occur as normal, whenever the AT80C51RD2 is reset. Exiting Power-down with an
interrupt is significantly different. The interrupt is held low long enough for the oscillator to stabi-
lize. 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 power-down, it is bet-
ter to reset the WDT just before entering power-down.
In the Idle mode, the oscillator continues to run. To prevent the WDT from resetting the
AT80C51RD2 while in Idle mode, the user should always set up a timer that will periodically 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 S0Selected Time-out
00
0
(214 - 1) machine cycles, 16. 3 ms @ F
osc =12 MHz
00
1
(2
15 - 1) machine cycles, 32.7 ms @ F
osc=12 MHz
01
0 (216 - 1) machine cycles, 65. 5 ms @ F
osc=12 MHz
01
1
(217 - 1) machine cycles, 131 ms @ F
osc=12 MHz
10
0
(2
18 - 1) machine cycles, 262 ms @ F
osc=12 MHz
10
1 (219 - 1) machine cycles, 542 ms @ F
osc=12 MHz
11
0
(220 - 1) machine cycles, 1.05 s @ F
osc=12 MHz
11
1
(2
21 - 1) machine cycles, 2.09 s @ F
osc=12 MHz
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT80C51RD2-SLSCM | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Microcontroller |
| AT80C51RD2-SLSIL | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2-SLSIM | 功能描述:IC MCU 8051 5V SPI 20MHZ 44-PLCC RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:80C 标准包装:9 系列:87C 核心处理器:8051 芯体尺寸:8-位 速度:40/20MHz 连通性:UART/USART 外围设备:POR，WDT 输入/输出数:32 程序存储器容量:32KB（32K x 8） 程序存储器类型:OTP EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:- 振荡器型:内部 工作温度:0°C ~ 70°C 封装/外壳:40-DIP（0.600"，15.24mm） 包装:管件 |
| AT80C51RD2-SLSUL | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2-SLSUM | 功能描述:8位微控制器 -MCU MCU 8-Bit HI Perform ROMless 3-5V RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
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