參數(shù)資料
型號: AT89LP828-20JU
廠商: Atmel
文件頁數(shù): 58/149頁
文件大小: 0K
描述: MCU 8051 8K FLASH SPI 32PLCC
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 32
系列: 89LP
核心處理器: 8051
芯體尺寸: 8-位
速度: 20MHz
連通性: SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 30
程序存儲器容量: 8KB(8K x 8)
程序存儲器類型: 閃存
EEPROM 大小: 1K x 8
RAM 容量: 768 x 8
電壓 - 電源 (Vcc/Vdd): 2.4 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 32-LCC(J 形引線)
包裝: 管件
16
3654A–MICRO–8/09
AT89LP428/828
5.
Enhanced CPU
The AT89LP428/828 uses an enhanced 8051 CPU that runs at 6 to 12 times the speed of stan-
dard 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. A sim-
ple example is shown in Figure 5-1.
Figure 5-1.
Parallel Instruction Fetches and Executions
The MCS-51 instruction set allows for instructions of variable length from 1 to 3 bytes. In a sin-
gle-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 AT89LP428/828 follow this rule: the
instruction execution time in 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 107 for more detailed information on individual instructions. Figures 5-2 and 5-3 show
examples of 1- and 2-byte instructions.
Figure 5-2.
Single-cycle ALU Operation (Example: INC R0)
System Clock
nth Instruction
(n+1)th Instruction
Fetch
Execute
Fetch
Execute
Fetch
Tn
Tn+1
Tn+2
(n+2)th Instruction
System Clock
Total Execution Time
Register Operand Fetch
T1
T2
T3
ALU Operation Execute
Result Write Back
Fetch Next Instruction
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT89LP828-20MH 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 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT89LP828-20PU 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 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT89LP828-AU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K ISP Flash, 2.4-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT89LP828-JU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K ISP Flash, 2.4-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT89LP828-PU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K ISP Flash, 2.4-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT