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| 型號： | P89LPC9107FN,112 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 26/39頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC 80C51 MCU FLASH 1K 14-DIP |
| 標準包裝： | 28 |
| 系列： | LPC900 |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 18MHz |
| 連通性： | UART/USART |
| 外圍設備： | 欠壓檢測/復位，LED，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 12 |
| 程序存儲器容量： | 1KB（1K x 8） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 128 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.4 V ~ 3.6 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 4x10b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 14-DIP（0.300"，7.62mm） |
| 包裝： | 管件 |
| 配用： | DB-TSSOP-LPC9107-ND - BOARD FOR LPC9107 TSSOP 622-1006-ND - SOCKET ADAPTER BOARD 622-1003-ND - KIT FOR LCD DEMO 568-1759-ND - EMULATOR DEBUGGER/PROGRMMR LPC9X |
| 其它名稱： | 935282288112 P89LPC9107FN P89LPC9107FN-ND |
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P89LPC9102_9103_9107_3
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 03 — 10 July 2007
32 of 61
NXP Semiconductors
P89LPC9102/9103/9107
8-bit microcontrollers with two-clock accelerated 80C51 core
8.12.2 Quasi-bidirectional output conguration
Quasi-bidirectional output type can be used as both an input and output without the need
to recongure 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 fairly large current. These features are
somewhat similar to an open-drain output except that there are three pull-up transistors in
the quasi-bidirectional output that serve different purposes.
The P89LPC9102/9103/9107 is a 3 V device, however, the pins are 5 V-tolerant. In
quasi-bidirectional mode, if a user applies 5 V on the pin, there will be a current owing
from the pin to VDD, causing extra power consumption. Therefore, applying 5 V in
quasi-bidirectional mode is discouraged.
A quasi-bidirectional port pin has a Schmitt triggered input that also has a glitch
suppression circuit.
8.12.3 Open-drain output conguration
The open-drain output conguration turns off all pull-ups and only drives the pull-down
transistor of the port driver when the port latch contains a logic 0. To be used as a logic
output, a port congured in this manner must have an external pull-up, typically a resistor
tied to VDD.
An open-drain port pin has a Schmitt triggered input that also has a glitch suppression
circuit.
8.12.4 Input-only conguration
The input-only port conguration has no output drivers. It is a Schmitt triggered input that
also has a glitch suppression circuit.
8.12.5 Push-pull output conguration
The push-pull output conguration 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.
8.12.6 Port 0 analog functions
The P89LPC9102/9103/9107 incorporates an Analog Comparator. 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 as described in Section 8.12.4 “Input-only conguration”.
Digital inputs on Port 0 may be disabled through the use of the PT0AD register. On any
reset, the PT0AD bits default to logic 0s to enable digital functions.
8.12.7 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.
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| P89LPC912 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM |
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