參數(shù)資料
型號: AT89LP2052-20SU
廠商: Atmel
文件頁數(shù): 13/94頁
文件大小: 0K
描述: IC 8051 MCU FLASH 2K 20SOIC
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 38
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-SOIC(0.295",7.50mm 寬)
包裝: 管件
產(chǎn)品目錄頁面: 616 (CN2011-ZH PDF)
20
3547J–MICRO–10/09
AT89LP2052/LP4052
15. I/O Ports
All 15 port pins on the AT89LP2052/LP4052 may be configured to one of four modes: quasi-bidi-
rectional (standard 8051 port outputs), push-pull output, open-drain output, or input-only. Port
modes may be assigned in software on a pin-by-pin basis as shown in Table 15-1. All port pins
default to input-only mode after reset. Each port pin also has a Schmitt-triggered input for
improved input noise rejection. During Power-down all the Schmitt-triggered inputs are disabled
with the exception of P3.2 and P3.3, which may be used to wake-up the device. Therefore P3.2
and P3.3 should not be left floating during Power-down.
15.1
Quasi-bidirectional Output
Port pins in quasi-bidirectional output mode function similar to standard 8051 port pins. A Quasi-
bidirectional port can be used both as an input and output without the need to reconfigure the
port. This is possible because when the port outputs a logic high, it is weakly driven, allowing an
external device to pull the pin low. When the pin is driven low, it is driven strongly and able to
sink a large current. There are three pull-up transistors in the quasi-bidirectional output that
serve different purposes.
One of these pull-ups, called the “very weak” pull-up, is turned on whenever the port register for
the pin contains a logic “1”. This very weak pull-up sources a very small current that will pull the
pin high if it is left floating.
Table 14-4.
IPH
– Interrupt Priority High Register
IPH = B7H
Reset Value = X0X0 0000B
Not Bit Addressable
PCH
PSH
PT1H
PX1H
PT0H
PX0H
Bit
7
6
543
21
0
Symbol
Function
PCH
Comparator Interrupt Priority High
PSH
Serial Port Interrupt Priority High
PT1H
Timer 1 Interrupt Priority High
PX1H
External Interrupt 1 Priority High
PT0H
Timer 0 Interrupt Priority High
PX0H
External Interrupt 0 Priority High
Table 15-1.
Configuration Modes for Port x, Bit y
PxM0.y
PxM1.y
Port Mode
0
Quasi-bidirectional
0
1
Push-pull Output
1
0
Input Only (High Impedance)
1
Open-Drain Output
相關(guān)PDF資料
PDF描述
AT89LP52-20AU IC MCU 8051 8K FLASH SPI 44TQFP
AT89LP52-20PU IC MCU 8051 8K FLASH SPI 40PDIP
ATMEGA48PA-MMN MCU AVR 4KB FLASH 20MHZ 28QFN
ATMEGA48PA-PN MCU AVR 4KB FLASH 20MHZ 28PDIP
AT89LS51-16PU IC MCU 4K FLASH 16MHZ 40-DIP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
AT89LP213-16XI 功能描述:8位微控制器 -MCU Microcontroller 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