参数资料
型号: AT89LP51-20PU
厂商: Atmel
文件页数: 97/117页
文件大小: 0K
描述: MCU 8051 4K FLASH 20MHZ
标准包装: 10
系列: 89LP
核心处理器: 8051
芯体尺寸: 8-位
速度: 20MHz
连通性: EBI/EMI,I²C,SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 36
程序存储器容量: 4KB(4K x 8)
程序存储器类型: 闪存
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 2.4 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
80
3709D–MICRO–12/11
AT89LP51/52
The Parallel interface is a special mode of the serial interface, i.e. the serial interface is used to
enable the parallel interface. After enabling the interface serially over P1.7/SCK and P1.5/MOSI,
P1.5 is reconfigured as an active-low output enable (OE) for data on Port 0. When OE =1, com-
mand, address and write data bytes are input on Port 0 and sampled at the rising edge of SCK.
When OE =0, read data bytes are output on Port 0 and should be sampled on the falling edge of
SCK. The P1.7/SCK and RST pins continue to function in the same manner. With the addition of
VDD and GND, the parallel interface requires a minimum of fourteen connections as shown in
Figure 17-2. Note that a connection to P1.6/MISO is not required for using the parallel interface.
Figure 17-2. Parallel Programming Device Connections
The Programming Interface is the only means of externally programming the AT89LP51/52
microcontroller. The Interface can be used to program the device both in-system and in a stand-
alone serial programmer. The Interface does not require any clock other than SCK and is not
limited by the system clock frequency. During Programming the system clock source of the tar-
get device can operate normally.
When designing a system where In-System Programming will be used, the following observa-
tions must be considered for correct operation:
The ISP interface uses the SPI clock mode 0 (CPOL = 0, CPHA = 0) exclusively with a
maximum frequency of 5 MHz.
The AT89LP51/52 will enter programming mode only when its reset line (RST) is active. To
simplify this operation, it is recommended that the target reset can be controlled by the In-
System programmer. To avoid problems, the In-System programmer should be able to keep
the entire target system reset for the duration of the programming cycle. The target system
should never attempt to drive the three SPI lines while reset is active.
The ISP Enable Fuse must be set to allow programming during any reset period. If the ISP
Fuse is disabled, ISP may only be entered at POR. To enter programming the RST pin must
be driven active prior to the end of Power-On Reset (POR). After POR has completed the
device will remain in ISP mode until RST is brought inactive. Once the initial ISP session has
ended, the power to the target device must be cycled OFF and ON to enter another session.
Note that if this method is required, an active-low reset polarity is recommended.
For standalone programmers, an active-low reset polarity is recommended (POL = 0). RST
may then be tied directly to GND to ensure correct entry into Programming mode regardless
of the device settings.
AT89LP51/52
VDD
RST
P1.7/SCK
P1.5/MOSI
GND
Clock
OE
RST
POL
GND or VDD
P0.7-0
Data In/Out
8
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AT89LP51ED2-20AAU 功能描述:8位微控制器 -MCU 64KB 20MHz 2.4V-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
AT89LP51ED2-20AU 功能描述:8位微控制器 -MCU 64KB 20MHz 2.4V-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
AT89LP51ED2-20JU 功能描述:8位微控制器 -MCU 64KB 20MHz 2.4V-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
AT89LP51ED2-20MU 功能描述:8位微控制器 -MCU 64KB 20MHz 2.4V-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
AT89LP51ED2-20PU 功能描述:8位微控制器 -MCU 64KB 20MHz 2.4V-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