参数资料
型号: P89LPC9251FDH
厂商: NXP SEMICONDUCTORS
元件分类: 微控制器/微处理器
英文描述: 8-bit microcontroller with accelerated two-clock 80C51 core 2 kB-4 kB-8 kB 3 V byte-erasable flash with 8-bit ADC
中文描述: MICROCONTROLLER, PDSO20
封装: 4.40 MM, PLASTIC, MO-153, SOT360-1, TSSOP-20
文件页数: 27/75页
文件大小: 1612K
代理商: P89LPC9251FDH
P89LPC92X1
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 2 — 1 December 2010
33 of 75
NXP Semiconductors
P89LPC9201/9211/922A1/9241/
8-bit microcontroller with 8-bit ADC
An open-drain port pin has a Schmitt trigger input that also has a glitch suppression
circuit.
7.16.1.3
Input-only configuration
The input-only port configuration has no output drivers. It is a Schmitt trigger input that
also has a glitch suppression circuit.
7.16.1.4
Push-pull output configuration
The push-pull output configuration has the same pull-down structure as both the
open-drain and the quasi-bidirectional output modes, but provides a continuous strong
pull-up when the port latch contains a logic 1. The push-pull mode may be used when
more source current is needed from a port output. A push-pull port pin has a
Schmitt triggered input that also has a glitch suppression circuit. The
P89LPC9201/9211/922A1/9241/9251 device has high current source on eight pins in
7.16.2 Port 0 analog functions
The P89LPC9201/9211/922A1/9241/9251 incorporates two Analog Comparators. In order
to give the best analog function performance and to minimize power consumption, pins
that are being used for analog functions must have the digital outputs and digital inputs
disabled.
Digital outputs are disabled by putting the port output into the Input-Only
(high-impedance) mode.
Digital inputs on Port 0 may be disabled through the use of the PT0AD register, bits 1:5.
On any reset, PT0AD[1:5] defaults to logic 0s to enable digital functions.
7.16.3 Additional port features
After power-up, all pins are in Input-Only mode. Please note that this is different from
the LPC76x series of devices.
After power-up, all I/O pins except P1.5, may be configured by software.
Pin P1.5 is input only. Pins P1.2 and P1.3 are configurable for either input-only or
open-drain.
Every output on the P89LPC9201/9211/922A1/9241/9251 has been designed to sink
typical LED drive current. However, there is a maximum total output current for all ports
which must not be exceeded. Please refer to Table 12 “Static characteristics” for detailed
specifications.
All ports pins that can function as an output have slew rate controlled outputs to limit noise
generated by quickly switching output signals. The slew rate is factory-set to
approximately 10 ns rise and fall times.
7.17 Power monitoring functions
The P89LPC9201/9211/922A1/9241/9251 incorporates power monitoring functions
designed to prevent incorrect operation during initial power-up and power loss or
reduction during operation. This is accomplished with two hardware functions: Power-on
detect and brownout detect.
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P89LPC925FDH-S 制造商:NXP Semiconductors 功能描述:MCU 8-bit P89 80C51 CISC 8KB Flash 2.5V/3.3V 20-Pin TSSOP
P89LPC925FN,129 功能描述:8位微控制器 -MCU 8K FL/256B RAM/I2C/UART/ADC 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