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參數(shù)資料
| 型號： | P89LPC914 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM |
| 中文描述： | 8位微控制器兩個小時80C51的核心具有1KB 3伏閃光的128字節(jié)RAM |
| 文件頁數(shù)： | 32/63頁 |
| 文件大?。?/td> | 314K |
| 代理商： | P89LPC914 |
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Philips Semiconductors
P89LPC912/913/914
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 03 — 17 December 2004
32 of 63
9397 750 14468
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
[1]
Required for operation above 12 MHz.
The P89LPC914 has 3 I/O ports: Port 0, Port 1, and Port 2. The exact number of I/O
pins available depends on the reset option chosen, as shown in
Table 11
.
[1]
Required for external clock frequency above 12 MHz.
9.11.1
Port configurations
Except as listed below, every I/O pin on the P89LPC912/913/914 may be configured
by software to one of four types on a bit-by-bit basis. These are: quasi-bidirectional
(standard 80C51 port outputs), push-pull, open drain, and input-only. Two
configuration registers for each port select the output type for each port pin.
P1.5/RST can only be an input and cannot be configured.
P1.2/T0 may only be configured to be either input-only or open drain (P89LPC912,
P89LPC914).
9.11.2
Quasi-bidirectional output configuration
Quasi-bidirectional output type can be used as both 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 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 P89LPC912/913/914 is a 3 V device, but the pins are 5 V-tolerant. In
quasi-bidirectional mode, if a user applies 5 V on the pin, there will be a current
flowing from the pin to V
DD
, causing extra power consumption. Therefore, applying
5 V in quasi-bidirectional mode is discouraged.
Table 10:
Clock source
Number of I/O pins available (P89LPC912, P89LPC913)
Reset option
Number of
I/O pins
(14-pin
package)
12
On-chip oscillator or watchdog
oscillator
No external reset (except during
power-up)
External RST pin supported
No external reset (except during
power-up)
External RST pin supported
No external reset (except during
power-up)
External RST pin supported
[1]
11
11
External clock input
10
10
Low/medium/high speed oscillator
(external crystal or resonator)
9
Table 11:
Reset option
Number of I/O pins available (P89LPC914)
Number of I/O pins
(14-pin package)
12
11
No external reset (except during power-up)
External RST pin supported
[1]
相關(guān)PDF資料 |
PDF描述 |
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| P89LPC914FDH | 8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P89LPC914FDH | 制造商:NXP Semiconductors 功能描述:MCU 8BIT 80C51 1K FLASH TSSOP14 |
| P89LPC914FDH,129 | 功能描述:8位微控制器 -MCU PREF PART P89LPC913FDH-S 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 |
| P89LPC914FDH-S | 功能描述:8位微控制器 -MCU PREF PART P89LPC913FDH-S 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 |
| P89LPC915 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontrollers with accelerated two-clock 80C51 core 2 kB 3 V Flash with 8-bit A/D converter |
| P89LPC9151 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontroller with accelerated two-clock 80C51 core, 2 kB 3 V byte-erasable flash with 8-bit ADC |
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