參數(shù)資料
型號: AT89LP2052-20PU
廠商: Atmel
文件頁數(shù): 14/94頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 2K 20DIP
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標準包裝: 18
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): 15
程序存儲器容量: 2KB(2K x 8)
程序存儲器類型: 閃存
RAM 容量: 256 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: 20-DIP(0.300",7.62mm)
包裝: 管件
產(chǎn)品目錄頁面: 616 (CN2011-ZH PDF)
21
3547J–MICRO–10/09
AT89LP2052/LP4052
A second pull-up, called the “weak” pull-up, is turned on when the port register for the pin con-
tains a logic “1” and the pin itself is also at a logic “1” level. This pull-up provides the primary
source current for a quasi-bidirectional pin that is outputting a 1. If this pin is pulled low by an
external device, this weak pull-up turns off, and only the very weak pull-up remains on. In order
to pull the pin low under these conditions, the external device has to sink enough current to over-
power the weak pull-up and pull the port pin below its input threshold voltage.
The third pull-up is referred to as the “strong” pull-up. This pull-up is used to speed up low-to-
high transitions on a quasi-bidirectional port pin when the port register changes from a logic “0”
to a logic “1”. When this occurs, the strong pull-up turns on for one CPU clock, quickly pulling the
port pin high.
When in quasi-bidirectional mode the port pin will always output a “0” when corresponding bit in
the port register is also “0”. When the port register is “1” the pin may be used either as an input
or an output of “1”. The quasi-bidirectional port configuration is shown in Figure 15-1. The input
circuitry of P3.2 and P3.3 is not disabled during Power-down (see Figure 15-3).
Figure 15-1. Quasi-bidirectional Output
15.2
Input-only Mode
The input port configuration is shown in Figure 15-2. It is a Schmitt-triggered input for improved
input noise rejection.
Figure 15-2. Input Only
Figure 15-3. Input Only for P3.2 and P3.3
1 Clock Delay
(D Flip-Flop)
Strong
Very
Weak
Port
Pin
VCC
From Port
Register
Input
Data
PWD
Port
Pin
Input
Data
PWD
Port
Pin
Input
Data
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參數(shù)描述
AT89LP2052-20SU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K FLASH 20MHZ 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
AT89LP2052-20XU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K FLASH-20MHZ 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
AT89LP2052W-10PU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.0-3.6V 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
AT89LP2052W-10SU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.0-3.6V 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
AT89LP2052W-10XU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.0-3.6V 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