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參數(shù)資料
| 型號： | P89LPC931 |
| 英文描述： | 8-bit microcontrollers with two-clock 80C51 core 4 kB/8 kB 3 V Flash with 256-byte data RAM |
| 中文描述： | 8位微控制器兩個小時80C51的核心4 KB的/ 8 KB的256 3伏閃存內(nèi)存字節(jié)的數(shù)據(jù) |
| 文件頁數(shù)： | 17/54頁 |
| 文件大?。?/td> | 1015K |
| 代理商： | P89LPC931 |
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Philips Semiconductors
P89LPC930/931
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 03 — 06 October 2003
17 of 54
9397 750 12122
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
8.2.6
Clock output
The P89LPC930/931 supports a user-selectable clock output function on the
XTAL2/CLKOUT pin when crystal oscillator is not being used. This condition occurs if
another clock source has been selected (on-chip RC oscillator, Watchdog oscillator,
external clock input on X1) and if the Real-Time clock is not using the crystal
oscillator as its clock source. This allows external devices to synchronize to the
P89LPC930/931. This output is enabled by the ENCLK bit in the TRIM register. The
frequency of this clock output is
1
2
that of the CCLK. If the clock output is not needed
in Idle mode, it may be turned off prior to entering Idle, saving additional power.
8.3 On-chip RC oscillator option
The P89LPC930/931 has a 6-bit TRIM register that can be used to tune the
frequency of the RC oscillator. During reset, the TRIM value is initialized to a factory
pre-programmed value to adjust the oscillator frequency to 7.373 MHz,
±
2.5%.
End-user applications can write to the Trim register to adjust the on-chip RC oscillator
to other frequencies.
8.4 Watchdog oscillator option
The watchdog has a separate oscillator which has a frequency of 400 kHz. This
oscillator can be used to save power when a high clock frequency is not needed.
8.5 External clock input option
In this configuration, the processor clock is derived from an external source driving
the XTAL1/P3.1 pin. The rate may be from 0 Hz up to 12 MHz. The XTAL2/P3.0 pin
may be used as a standard port pin or a clock output.
Fig 4.
Block diagram of oscillator control.
2
002aaa431
RTC
CPU
WDT
BAUD RATE
GENERATOR
DIVM
CCLK
UART
OSCCLK
I
2
C
SPI
PCLK
TIMER 0 and
TIMER 1
High freq.
Med. freq.
Low freq.
XTAL1
XTAL2
RC
OSCILLATOR
WATCHDOG
OSCILLATOR
(7.3728 MHz)
(400 kHz)
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| P89LPC9311FDH,129 | 功能描述:8位微控制器 -MCU PREF PART P89LPC931FDH 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 |
| P89LPC9311FDH-S | 功能描述:8位微控制器 -MCU PRF PRT P89LPC931FDH 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 |
| P89LPC931A1 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontroller with accelerated two-clock 80C51 core 4 kB/8 kB 3 V byte-erasable flash |
| P89LPC931A1FDH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontroller with accelerated two-clock 80C51 core 4 kB/8 kB 3 V byte-erasable flash |
| P89LPC931A1FDH,512 | 功能描述:8位微控制器 -MCU IC 80C51 MCU FLASH 8K 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 |
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