AM79C973KCW Advanced Micro Devices, AM79C973KCW Datasheet - Page 194

• Manufacturer Part Number: AM79C973KCW
• Description: PCnet-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY
• Manufacturer: Advanced Micro Devices

Notes:
1. R/W = Read/Write, SC = Self Clearing, RO = Read only.
2. Soft Reset does not reset the PDX block. Refer to the Soft Reset Section for details.
3. Bits 8 and 13 have no effect if Auto-Negotiation is enabled (Bit 12 = 1).
194
Reg
0
0
0
0
0
0
0
0
0
0
Bits
6-0
15
14
13
12
11
10
9
8
7
Soft Reset (Note 2)
Auto-Negotiation
Speed Selection
Restart Auto-
Duplex Mode
Collision Test
Power Down
Negotiation
Loopback
Reserved
(Note 3)
(Note 3)
Enable
Isolate
Name
Table 40. ANR0: PHY Control Register (Register 0)
When write: 1 = PHY software reset,
0 = normal operation.
When read: 1 = reset in process,
0 = reset done.
1 =asserts the internal LPBCK,
0 = deasserts the internal LPBCK
1 = 100 Mbps,
0 = 10 Mbps
1 = enable Auto-Negotiation,
0 = disable Auto-Negotiation
1 = power down, 0 = normal operation
1 = electrically isolate PHY
0 = normal operation
1 = restart Auto-Negotiation,
0 = normal operation
1 = full duplex,
0 = half duplex
1 = enable COL signal test,
0 = disable COL signal test
Write as 0, ignore on read
P R E L I M I N A R Y
Am79C973/Am79C975
Description
Read/Write
(Note 1)
R/W, SC
R/W, SC
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
Default
Value
0
0
1
1
0
1
0
1
0
0
previous
Retains
Reset
value
Soft
0
0
1
1
0
1
0
0
0