参数资料
型号: AT80C51RD2-SLSUM
厂商: Atmel
文件页数: 38/81页
文件大小: 0K
描述: IC 8051 MCU 5V SPI 20MHZ 44-PLCC
标准包装: 972
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): 4.5 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 44-PLCC
包装: 管件
43
4113D–8051–01/09
AT80C51RD2
Table 11-12. PCON Register
PCON - Power Control Register (87h)
Reset Value = 00X1 0000b
Not bit addressable
Power-off flag reset value will be 1 only after a power on (cold reset). A warm reset doesn’t affect
the value of this bit.
765
4321
0
SMOD1
SMOD0
-
POF
GF1
GF0
PD
IDL
Bit
Number
Bit
Mnemonic
Description
7SMOD1
Serial Port Mode bit 1 for UART
Set to select double baud rate in mode 1, 2 or 3.
6SMOD0
Serial Port Mode bit 0 for UART
Cleared to select SM0 bit in SCON register.
Set to select FE bit in SCON register.
5-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
4POF
Power-off Flag
Cleared to recognize next reset type.
Set by hardware when V
CC rises from 0 to its nominal voltage. Can also be set by
software.
3GF1
General purpose Flag
Cleared by user for general purpose usage.
Set by user for general purpose usage.
2GF0
General purpose Flag
Cleared by user for general purpose usage.
Set by user for general purpose usage.
1PD
Power-down mode bit
Cleared by hardware when reset occurs.
Set to enter power-down mode.
0IDL
Idle mode bit
Cleared by hardware when interrupt or reset occurs.
Set to enter idle mode.
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