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来源：百度知道 编辑：UC知道 时间：2024/06/05 23:05:27
The AT89C52 provides the following standard features: 8K
bytes of Flash, 256 bytes of RAM, 32 I/O lines, three 16-bit
timer/counters, a six-vector two-level interrupt architecture,
a full-duplex serial port, on-chip oscillator, and clock circuitry.
In addition, the AT89C52 is designed with static logic
for operation down to zero frequency and supports two
software selectable power saving modes. The Idle Mode
stops the CPU while allowing the RAM, timer/counters,
serial port, and interrupt system to continue functioning.
The Power-down mode saves the RAM contents but
freezes the oscillator, disabling all other chip functions untilthe next hardware reset.
Pin Description
VCC
Supply voltage.
GND
Ground.
Port 0
Port 0 is an 8-bit open drain bi-directional I/O port. As an
output port, each pin can sink eight TTL inputs. When 1s
are written to port 0 pins, the pins can be used as highimpedance
bytes of Flash, 256 bytes of RAM, 32 I/O lines, three 16-bit
timer/counters, a six-vector two-level interrupt architecture,
a full-duplex serial port, on-chip oscillator, and clock circuitry.
In addition, the AT89C52 is designed with static logic
for operation down to zero frequency and supports two
software selectable power saving modes. The Idle Mode
stops the CPU while allowing the RAM, timer/counters,
serial port, and interrupt system to continue functioning.
The Power-down mode saves the RAM contents but
freezes the oscillator, disabling all other chip functions untilthe next hardware reset.
Pin Description
VCC
Supply voltage.
GND
Ground.
Port 0
Port 0 is an 8-bit open drain bi-directional I/O port. As an
output port, each pin can sink eight TTL inputs. When 1s
are written to port 0 pins, the pins can be used as highimpedance
我用翻译工具翻的：
在AT89C52单片机提供以下标准功能： 8K型
字节的闪存， 256B的RAM ， 32 I / O线，三个16位
定时器/计数器， 6向量2级中断结构，
1全双工串行接口，片上振荡器和时钟电路。
此外， AT89C52单片机设计的静态逻辑
运行到零频率和支持两种
软件可选节电模式。闲置模式
停止的CPU ，同时允许的RAM ，定时器/计数器，
串行端口，并中断系统继续运作。
在掉电模式保存RAM的内容，但
冻结振荡器，停用所有其他片上功能untilthe未来硬件复位。
引脚描述
虚拟通道连接
电源电压。
接地
地面。
端口0
端口0是一个8位漏极开路双向I / O端口。作为一个
输出端口，每个引脚可以汇8的TTL投入。当1秒
写入端口0引脚，该引脚可作为highimpedance
投入。
端口0也可以配置为复loworder
地址/数据总线，在访问外部程序
和数据存储器。在这种模式下， P0已经内部
pullups 。
港口还收到0字节的代码在Flash编程
和产出的过程中程序代码字节
核查。外部pullups必须在计划
核查。