参数资料
型号: AT89LP52-20PU
厂商: Atmel
文件页数: 36/117页
文件大小: 0K
描述: IC MCU 8051 8K FLASH SPI 40PDIP
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: 8KB(8K 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
25
3709D–MICRO–12/11
AT89LP51/52
5.
Enhanced CPU
The AT89LP51/52 uses an enhanced 8051 CPU that runs at 6 to 12 times the speed of standard
8051 devices (or 3 to 6 times the speed of X2 8051 devices). The increase in performance is
due to two factors. First, the CPU fetches one instruction byte from the code memory every clock
cycle. Second, the CPU uses a simple two-stage pipeline to fetch and execute instructions in
parallel. This basic pipelining concept allows the CPU to obtain up to 1 MIPS per MHz. The
AT89LP51/52 also has a Compatibility mode that preserves the 12-clock machine cycle of stan-
dard 8051s like the AT89S51/52.
5.1
Fast Mode
Fast (Single-Cycle) mode must be enabled by clearing the Compatibility User Fuse. (See “User
Configuration Fuses” on page 86.) In this mode one instruction byte is fetched every system
clock cycle. The 8051 instruction set allows for instructions of variable length from 1 to 3 bytes.
In a single-clock-per-byte-fetch system this means each instruction takes at least as many
clocks as it has bytes to execute. The majority of instructions in the AT89LP51/52 follow this
rule: the instruction execution time in system clock cycles equals the number of bytes per
instruction, with a few exceptions. Branches and Calls require an additional cycle to compute the
target address and some other complex instructions require multiple cycles. See “Instruction Set
Summary” on page 75. for more detailed information on individual instructions.
Example of Fast mode instructions are shown in Figure 5-1. Note that Fast mode instructions
take three times as long to execute if they are fetched from external program memory.
Figure 5-1.
Instruction Execution Sequences in Fast Mode
READ NEXT
OPCODE
(A) 1-byte, 1-cycle instruction, e.g. INC A
S1
(B) 2-byte, 2-cycle instruction, e.g. ADD A, #data
S1
S2
READ NEXT OPCODE
READ OPERAND
(C) 1-byte, 2-cycle instruction, e.g. INC DPTR
S1
S2
READ NEXT OPCODE
(D) MOVX (1-byte, 4-cycle)
S1
S2
S3
S4
ADDR
DATA
ACCESS EXTERNAL
MEMORY
CLK
READ NEXT
OPCODE
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AT89LP6440-20AU 功能描述:8位微控制器 -MCU Single-Cycle 8051 64K ISP Flash 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
AT89LP6440-20JU 功能描述:8位微控制器 -MCU Single-Cycle 8051 64K ISP Flash 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
AT89LP6440-20MU 功能描述:8位微控制器 -MCU Single-Cycle 8051 64K ISP Flash 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
AT89LP6440-20PU 功能描述:8位微控制器 -MCU Single-Cycle 8051 64K ISP Flash 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
AT89LP828-20AU 功能描述:8位微控制器 -MCU Single Cycle 8051 8K ISP Flash 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