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| 型号： | P89LPC924FDH |
| 厂商： | NXP Semiconductors N.V. |
| 元件分类： | 8位微控制器 |
| 英文描述： | 8-bit microcontrollers with accelerated two-clock 80C51 core 4 kB-8 kB 3 V low-power Flash with 8-bit A-D converter |
| 封装： | P89LPC924FDH<SOT360-1 (TSSOP20)|<<http://www.nxp.com/packages/SOT360-1.html<1<Always Pb-free,;P89LPC925FDH<SOT360-1 (TSSOP20)|<<http://www.nxp.com/packages/SOT360-1.html& |
| 文件页数： | 6/49页 |
| 文件大小： | 233K |
| 代理商： | P89LPC924FDH |
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Philips Semiconductors
P89LPC924/925
8-bit microcontrollers with accelerated two-clock 80C51 core
Product data
Rev. 03 — 15 December 2004
14 of 49
9397 750 14471
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
8.
Functional description
Remark: Please refer to the
P89LPC924/925 User’s Manual for a more detailed
functional description.
8.1 Enhanced CPU
The P89LPC924/925 uses an enhanced 80C51 CPU which runs at 6 times the speed
of standard 80C51 devices. A machine cycle consists of two CPU clock cycles, and
most instructions execute in one or two machine cycles.
8.2 Clocks
8.2.1
Clock denitions
The P89LPC924/925 device has several internal clocks as dened below:
OSCCLK — Input to the DIVM clock divider. OSCCLK is selected from one of four
clock sources (see Figure 4) and can also be optionally divided to a slower frequency
Note: fosc is dened as the OSCCLK frequency.
CCLK — CPU clock; output of the clock divider. There are two CCLK cycles per
machine cycle, and most instructions are executed in one to two machine cycles (two
or four CCLK cycles).
RCCLK — The internal 7.373 MHz RC oscillator output.
PCLK — Clock for the various peripheral devices and is CCLK/2
8.2.2
CPU clock (OSCCLK)
The P89LPC924/925 provides several user-selectable oscillator options in generating
the CPU clock. This allows optimization for a range of needs from high precision to
lowest possible cost. These options are congured when the FLASH is programmed
and include an on-chip watchdog oscillator, an on-chip RC oscillator, an oscillator
using an external crystal, or an external clock source. The crystal oscillator can be
optimized for low, medium, or high frequency crystals covering a range from 20 kHz
to 12 MHz.
8.2.3
Low speed oscillator option
This option supports an external crystal in the range of 20 kHz to 100 kHz. Ceramic
resonators are also supported in this conguration.
8.2.4
Medium speed oscillator option
This option supports an external crystal in the range of 100 kHz to 4 MHz. Ceramic
resonators are also supported in this conguration.
8.2.5
High speed oscillator option
This option supports an external crystal in the range of 4 MHz to 18 MHz. Ceramic
resonators are also supported in this conguration. When using an oscillator
frequency above 12 MHz, the reset input function of P1.5 must be enabled. An
external circuit is required to hold the device in reset at power-up until VDD has
reached its specied level. When system power is removed VDD will fall below
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相关代理商/技术参数 |
参数描述 |
|---|---|
| P89LPC924FDH,518 | 功能描述:8位微控制器 -MCU 4K FL/256B 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 |
| P89LPC924FDH,529 | 功能描述:8位微控制器 -MCU ORDER P89LPC924FDH-T T/R 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 |
| P89LPC924FDH518 | 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU 80C51 18MHZ TSSOP-20 |
| P89LPC924FDH-S | 功能描述:8位微控制器 -MCU 80C51 4K FL 256B RAM 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 |
| P89LPC924FDH-T | 功能描述:8位微控制器 -MCU 4K 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 |
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