参数资料
| 型号： | AT89C2051-24SJ |
| 厂商： | Atmel |
| 文件页数： | 13/19页 |
| 文件大小： | 0K |
| 描述： | IC MCU 8BIT 2K FLASH 2.7V 20-PIN |
| 标准包装： | 37 |
| 系列： | 89C |
| 核心处理器： | 8051 |
| 芯体尺寸： | 8-位 |
| 速度： | 24MHz |
| 连通性： | UART/USART |
| 外围设备： | LED |
| 输入/输出数： | 15 |
| 程序存储器容量： | 2KB（2K x 8） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 128 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 4 V ~ 6 V |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 包装： | 管件 |
3
0368H–MICRO–6/08
AT89C2051
4.
Pin Description
4.1
VCC
Supply voltage.
4.2
GND
Ground.
4.3
Port 1
The Port 1 is an 8-bit bi-directional I/O port. Port pins P1.2 to P1.7 provide internal pull-ups. P1.0
and P1.1 require external pull-ups. P1.0 and P1.1 also serve as the positive input (AIN0) and the
negative input (AIN1), respectively, of the on-chip precision analog comparator. The Port 1 out-
put buffers can sink 20 mA and can drive LED displays directly. When 1s are written to Port 1
pins, they can be used as inputs. When pins P1.2 to P1.7 are used as inputs and are externally
pulled low, they will source current (I
IL) because of the internal pull-ups.
Port 1 also receives code data during Flash programming and verification.
4.4
Port 3
Port 3 pins P3.0 to P3.5, P3.7 are seven bi-directional I/O pins with internal pull-ups. P3.6 is
hard-wired as an input to the output of the on-chip comparator and is not accessible as a gen-
eral-purpose I/O pin. The Port 3 output buffers can sink 20 mA. When 1s are written to Port 3
pins they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 3
pins that are externally being pulled low will source current (I
IL) because of the pull-ups.
Port 3 also serves the functions of various special features of the AT89C2051 as listed below:
Port 3 also receives some control signals for Flash programming and verification.
4.5
RST
Reset input. All I/O pins are reset to 1s as soon as RST goes high. Holding the RST pin high for
two machine cycles while the oscillator is running resets the device.
Each machine cycle takes 12 oscillator or clock cycles.
4.6
XTAL1
Input to the inverting oscillator amplifier and input to the internal clock operating circuit.
Port Pin
Alternate Functions
P3.0
RXD (serial input port)
P3.1
TXD (serial output port)
P3.2
INT0 (external interrupt 0)
P3.3
INT1 (external interrupt 1)
P3.4
T0 (timer 0 external input)
P3.5
T1 (timer 1 external input)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT89C2051-24SU | 功能描述:8位微控制器 -MCU 20 PINS UART 2K FLASH-24MHZ 4-5.5V 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 |
| AT89C2051-24SU SL383 | 制造商:Atmel Corporation 功能描述:MCU 8-bit AT89 80C51 CISC 2KB Flash 5V 20-Pin SOIC T/R |
| AT89C2051-W-7 | 功能描述:8位微控制器 -MCU Microcontroller 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 |
| AT89C2051X2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:AT89C2051x2 Preliminary [Updated 12/02. 21 Pages] |
| AT89C2051X2-16PC | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Microcontroller with 2K Bytes Flash |
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