參數(shù)資料
型號: L80227
廠商: LSI CORP
元件分類: 網(wǎng)絡(luò)接口
英文描述: 10BASE-T/100BASE-TX Ethernet Physical Layer Device (PHY)(10BASE-T/100BASE-TX 以太網(wǎng)物理層處理器)
中文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封裝: LQFP-64
文件頁數(shù): 148/158頁
文件大小: 1084K
代理商: L80227
Draft 6/5/00
A-14
Application Information
Copyright 1999 by LSI Logic Corporation. All rights reserved.
Figure A.5
Serial Device Port Address Selection
A.9 Oscillator
The L80227 requires a 25 MHz reference frequency for internal signal
generation. This 25 MHz reference frequency can be generated from an
external 25 MHz crystal connected between OSCIN and GND or from
applying an external 25 MHz clock to OSCIN.
If the crystal oscillator is used, it needs only a crystal; no other external
capacitors or other components are required. The crystal must have the
characteristics shown in
Table A.3
. The crystal must be placed as close
as possible to the OSCIN and GND pins so that parasitics on OSCIN are
kept to a minimum.
LED
500
PLED0n
a. Output Driver/Input Address Correspondence
MDA3n
MDA2n
MDA1n
MDA0n
b. Setting Address with LEDs
High
PLED[3:0]
LED
500
Low
50K
c. Setting Address without LEDs
High
Low
50K
Float
PLED1n
PLED2n
PLED3n
PLED[3:0]
PLED[1:0]
PLED[3:2]
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