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LAN9500AI データシート(PDF) 134 Page - Microchip Technology

部品番号 LAN9500AI
部品情報  LAN950x USB 2.0 to 10/100 Ethernet Controller
PDF  213 Pages
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN9500AI データシート(HTML) 134 Page - Microchip Technology

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LAN950x
DS00001875A-page 134
 2010 - 2015 Microchip Technology Inc.
7:4
Back pressure Duration (BACK_DUR)
This field is used to select the time period for the Back pressure Duration
Timer. This field has no function in full-duplex mode.
Note:
Back pressure Duration is slightly greater in 10Mbs mode.
Back pressure Duration
100 Mbps Mode:
0h = 5 us
1h = 10 us
2h = 15 us
3h = 25 us
4h = 50 us
5h = 100 us
6h = 150 us
7h = 200 us
8h = 250 us
9h = 300 us
Ah = 350 us
Bh = 400 us
Ch = 450 us
Dh = 500 us
Eh = 550 us
Fh = 600 us
10 Mbps Mode:
0h = 7.2 us
1h = 12.2 us
2h = 17.2 us
3h = 27.2 us
4h = 52.2 us
5h = 102.2 us
6h = 152.2 us
7h = 202.2 us
8h = 252.2 us
9h = 302.2 us
Ah = 352.2 us
Bh = 402.2 us
Ch = 452.2 us
Dh = 502.2 us
Eh = 552.2 us
Fh = 602.2 us
R/W
0h
3
Flow Control on Multicast Frame (FCMULT)
When this bit is set, the device will assert back pressure when the AFC level
is reached and a multicast frame is received. This field has no function in full-
duplex mode.
R/W
0b
2
Flow Control on Broadcast Frame (FCBRD)
When this bit is set, the device will assert back pressure when the AFC level
is reached and a broadcast frame is received. This field has no function in
full-duplex mode.
R/W
0b
1
Flow Control on Address Decode (FCADD)
When this bit is set, the device will assert back pressure when the AFC level
is reached and a frame addressed to the device is received. This field has
no function in full-duplex mode.
R/W
0b
Bits
Description
Type
Default



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