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| 型号： | AT80C51RD2-3CSUM |
| 厂商： | Atmel |
| 文件页数： | 45/81页 |
| 文件大小： | 0K |
| 描述： | IC 8051 MCU 5V SPI 20MHZ 40-DIP |
| 标准包装： | 216 |
| 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： | 40-DIP（0.600"，15.24mm） |
| 包装： | 管件 |
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5
4113D–8051–01/09
AT80C51RD2
P2.0 - P2.7
21 - 28
24 - 31
18 - 25
I/O
Port 2: Port 2 is an 8-bit bi-directional I/O port with internal pull-ups. Port 2 pins
that have 1s written to them are pulled high by the internal pull-ups and can be
used as inputs. As inputs, Port 2 pins that are externally pulled low will source
current because of the internal pull-ups. Port 2 emits the high-order address byte
during fetches from external program memory and during accesses to external
data memory that use 16-bit addresses (MOVX @DPTR). In this application, it
uses strong internal pull-ups emitting 1s. During accesses to external data memory
that use 8-bit addresses (MOVX @Ri), Port 2 emits the contents of the P2 SFR.
Some Port 2 pins receive the high order address bits during ROM reading and
verification:
P2.0 to P2.5 for 16 KB devices
P2.0 to P2.6 for 32 KB devices
P3.0 - P3.7
10 - 17
11,
13 - 19
5,
7 - 13
I/O
Port 3: Port 3 is an 8-bit bi-directional I/O port with internal pull-ups. Port 3 pins
that have 1s written to them are pulled high by the internal pull-ups and can be
used as inputs. As inputs, Port 3 pins that are externally pulled low will source
current because of the internal pull-ups. Port 3 also serves the special features of
the 80C51 family, as listed below.
10
11
5
I
RXD (P3.0): Serial input port
11
13
7
O
TXD (P3.1): Serial output port
12
14
8
I
INT0 (P3.2): External interrupt 0
13
15
9
I
INT1 (P3.3): External interrupt 1
14
16
10
I
T0 (P3.4): Timer 0 external input
15
17
11
I
T1 (P3.5): Timer 1 external input
16
18
12
O
WR (P3.6): External data memory write strobe
17
19
13
O
RD (P3.7): External data memory read strobe
RST
9
10
4
I/O
Reset: A high on this pin for two machine cycles while the oscillator is running,
resets the device. An internal diffused resistor to V
SS permits a power-on reset
using only an external capacitor to V
CC. This pin is an output when the hardware
watchdog forces a system reset.
ALE/PROG
30
33
27
O (I)
Address Latch Enable/Program Pulse: Output pulse for latching the low byte of
the address during an access to external memory. In normal operation, ALE is
emitted at a constant rate of 1/6 (1/3 in X2 mode) the oscillator frequency, and can
be used for external timing or clocking. Note that one ALE pulse is skipped during
each access to external data memory. This pin is also the program pulse input
(PROG) during Flash programming. ALE can be disabled by setting SFR’s AUXR.0
bit. With this bit set, ALE will be inactive during internal fetches.
PSEN
29
32
26
O
Program Strobe Enable: The read strobe to external program memory. When
executing code from the external program memory, PSEN is activated twice each
machine cycle, except that two PSEN activations are skipped during each access
to external data memory. PSEN is not activated during fetches from internal
program memory.
EA
31
35
29
I
External Access Enable: EA must be externally held low to enable the device to
fetch code from external program memory locations. If security level 1 is
programmed, EA will be internally latched on Reset.
Table 3-1.
Pin Description (Continued)
Mnemonic
Pin Number
Type
Name and Function
DIL
PLCC44
VQFP44 1.4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT80C51RD2-RLRUM | 功能描述:8位微控制器 -MCU MCU 8-Bit HI Perform ROMless 3-5V 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 |
| AT80C51RD2-RLTIL | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2-RLTIM | 功能描述:IC MCU 8051 5V SPI 20MHZ 44-VQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:80C 标准包装:9 系列:87C 核心处理器:8051 芯体尺寸:8-位 速度:40/20MHz 连通性:UART/USART 外围设备:POR，WDT 输入/输出数:32 程序存储器容量:32KB（32K x 8） 程序存储器类型:OTP EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:- 振荡器型:内部 工作温度:0°C ~ 70°C 封装/外壳:40-DIP（0.600"，15.24mm） 包装:管件 |
| AT80C51RD2-RLTUL | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2-RLTUM | 功能描述:8位微控制器 -MCU MCU 8-Bit HI Perform ROMless 3-5V 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 |
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