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| 型号： | AT89C4051-24SU |
| 厂商： | Atmel |
| 文件页数： | 13/19页 |
| 文件大小： | 0K |
| 描述： | IC MCU 4K FLASH 24MHZ 20-SOIC |
| 产品培训模块： | MCU Product Line Introduction |
| 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： | 欠压检测/复位，LED，POR |
| 输入/输出数： | 15 |
| 程序存储器容量： | 4KB（4K 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 |
| 产品目录页面： | 616 (CN2011-ZH PDF) |
3
1001F–MICRO–6/08
AT89C4051
4.
Pin Description
4.1
VCC
Supply voltage.
4.2
GND
Ground.
4.3
Port 1
Port 1 is an 8-bit bi-directional I/O port. Port pins P1.2 to P1.7 provide internal pullups. P1.0 and
P1.1 require external pullups. P1.0 and P1.1 also serve as the positive input (AIN0) and the neg-
ative input (AIN1), respectively, of the on-chip precision analog comparator. The Port 1 output
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 pullups.
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 pullups. 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 pullups 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 pullups.
Port 3 also serves the functions of various special features of the AT89C4051 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 |
|---|---|
| AT89C4051-24SU SL383 | 制造商:Atmel Corporation 功能描述:8051 4K FLASH 2.7 TO 5.5V, PDI |
| AT89C51 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Microcontroller with 4K Bytes Flash |
| AT89C51_00 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Microcontroller with 4K Bytes Flash |
| AT89C51-12 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-Bit Microcontroller with 4K Bytes Flash |
| AT89C51-12AA | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-Bit Microcontroller with 4K Bytes Flash |
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