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LAN9250 датащи(PDF) 108 Page - Microchip Technology

номер детали LAN9250
подробное описание детали  Integrated Ethernet PHY with HP Auto-MDIX
PDF  421 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN9250 датащи(HTML) 108 Page - Microchip Technology

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LAN9250
DS00001913A-page 108
 2015 Microchip Technology Inc.
8-BIT READ
One of the Index Registers is set as described above. The address is then set to access the lower BYTE of the corre-
sponding Data Register and FIFOSEL is held low. Read data is driven on D[7:0] during RD active. D[15:8] pins are not
used or driven. The cycle repeats for the remaining BYTEs of the Data Register.
FIGURE 9-32:
INDEXED ADDRESSING INTERNAL REGISTER DATA ACCESS - 8-BIT READ
CS
RD
WR
INDEX,2'b00
D[15:8]
A[4:0]
INDEX,2'b01
Index 7:0
D[7:0]
Index 15:8
FIFOSEL
DATA,2'b00
DATA,2'b01
INDEX,2'b10
INDEX,2'b11
8'hXX
8'hXX
Hi-Z
Data 7:0
Data 15:8
Data 23:16
Data 31:24
DATA,2'b10
DATA,2'b11



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