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P89LPC904FD датащи(PDF) 14 Page - NXP Semiconductors

номер детали P89LPC904FD
подробное описание детали  8-bit microcontrollers with two-clock accelerated 80C51 core 1 kB 3 V byte-erasable Flash with 8-bit A/D converter
PDF  41 Pages
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производитель  PHILIPS [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

P89LPC904FD датащи(HTML) 14 Page - NXP Semiconductors

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Philips Semiconductors
P89LPC904
8-bit microcontrollers with two-clock accelerated 80C51 core
Preliminary data
Rev. 02 — 25 June 2004
14 of 41
9397 750 13521
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
8.5 External clock input option
In this configuration, the processor clock is derived from an external source driving
the P0.5/CMPREF/CLKIN pin. The rate may be from 0 Hz up to 12 MHz. The
P0.5/CMPREF/CLKIN pin may also be used as a standard port pin.
Fig 4.
Block diagram of oscillator control.
÷2
002aaa782
RTC
CPU
WDT
DIVM
CCLK
OSCCLK
PCLK
TIMERS 0 & 1
WATCHDOG
OSCILLATOR
RC
OSCILLATOR
(7.3728 MHz)
(400 kHz)
BAUD RATE
GENERATOR
UART
clkin
ADC1/
DAC1



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