参数资料
型号: AT89C51ED2-SMSUM
厂商: Atmel
文件页数: 120/137页
文件大小: 0K
描述: IC 8051 MCU FLASH 64K 68PLCC
产品培训模块: MCU Product Line Introduction
标准包装: 304
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 60MHz
连通性: SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 50
程序存储器容量: 64KB(64K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 2K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 68-PLCC
包装: 管件
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
83
4235K–8051–05/08
AT89C51RD2/ED2
18.4
Registers
Table 18-2.
PCON Register
PCON (S87:h) Power configuration Register
Reset Value= XXXX 0000b
7
6
5
4
3
2
1
0
-
GF1
GF0
PD
IDL
Bit Number
Bit
Mnemonic
Description
7-4
-
Reserved
The value read from these bits is indeterminate. Do not set these bits.
3
GF1
General Purpose flag 1
One use is to indicate whether an interrupt occurred during normal operation or during
Idle mode.
2
GF0
General Purpose flag 0
One use is to indicate whether an interrupt occurred during normal operation or during
Idle mode.
1
PD
Power-Down Mode bit
Cleared by hardware when an interrupt or reset occurs.
Set to activate the Power-Down mode.
If IDL and PD are both set, PD takes precedence.
0
IDL
Idle Mode bit
Cleared by hardware when an interrupt or reset occurs.
Set to activate the Idle mode.
If IDL and PD are both set, PD takes precedence.
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