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AM79C901AVCT датащи(PDF) 44 Page - Advanced Micro Devices

номер детали AM79C901AVCT
подробное описание детали  HomePHY Single-Chip 1/10 Mbps Home Networking PHY
PDF  90 Pages
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производитель  AMD [Advanced Micro Devices]
домашняя страница  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C901AVCT датащи(HTML) 44 Page - Advanced Micro Devices

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Am79C901A
PR ELI M IN AR Y
HPR0: HomePNA PHY Control Register (Register 0)
Table 17.
HPR0: HomePNA PHY Control Register (Register 0)
Notes:
1. For collision test, the “enable loopback mode” bit must also be set to ensure that collision traffic is not imposed
on the network.
2. R/W = Read/Write; R = Read only.
Bits
Name
Description
Read/
Write
Default
Value
(hex)
15
RESET
1 = RESET
When read, 1= reset in process
0 = Normal operation
** Self Clearing after ~70
µs
R/W
0
14
Enable Loopback Mode
1 = Loopback mode enable
0 = Loopback mode disable
R/W
0
13
Speed Selection
0 = 10 Mbps
R0
12
Auto-Negotiation Enabled
1 = Enabled
0 = Disabled
R0
11
Power Down
1 = Power down
0 = Normal operation
(This bit is mirrored in PHY Control bit 4)
R0
10
Isolate
1 = Electrically isolates PHY from the MII/GPSI
0 = Normal operation
R/W
1
9
Restart Auto-Negotiation
1 = Restart Auto-Negotiation
0 = Normal operation
** Self Clearing
R0
8
Duplex Mode
1 = Full-Duplex (for Loopback test only)
0 = Half-Duplex
R/W
0
7
Collision Test (Note 1)
1 = Enable COL test signal
0 = Disable COL test signal
R/W
0
6:0
Reserved
Write as 0, ignore on read
R0



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