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COM20020ILJP 데이터시트(PDF) 10 Page - Microchip Technology

부품명 COM20020ILJP
상세설명  5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
PDF  72 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

COM20020ILJP 데이터시트(HTML) 10 Page - Microchip Technology

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5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
Datasheet
Revision 12-05-06
Page 10
SMSC COM20020I Rev D
DATASHEET
PLCC PIN
NO.
NAME
SYMBOL
DESCRIPTION
21
nTransmit
nEnable
nTXEN
Output. This signal is used prior to the Power-up to enable
the line drivers for transmission. The polarity of the signal
is programmable through the nPULSE2 pin.
nPULSE2 floating before Power-up: nTXEN active low
(Default option)
nPULSE2 grounded before Power-up: nTXEN active high
(This option is only available in Backplane Mode)
16,17
Crystal
Oscillator
XTAL1,
XTAL2
An external crystal should be connected to these pins.
Oscillation frequency range is from 10 to 20 MHz. If an
external TTL clock is used instead, it must be connected to
XTAL1 with a 390
Ω pull-up resistor, and XTAL2 should be
left floating.
15,28
Power
Supply
VDD
+5 Volt Power Supply pin.
7,14,22
Ground
VSS
Ground pin.



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