AM79C978A AMD [Advanced Micro Devices], AM79C978A Datasheet - Page 192

• Manufacturer Part Number: AM79C978A
• Description: Single-Chip 1/10 Mbps PCI Home Networking Controller
• Manufacturer: AMD [Advanced Micro Devices]

HPR22: HomePNA PHY AID (Register 22)
The PHY’s AID address is used for collision detection.
Unless bit 7 of the CONTROL register is set, the PHY
is assured to select a unique AID address. Addresses
HPR23: HomePNA PHY Noise Control (Register 23)
HPR24: HomePNA PHY Noise Control 2 (Register 24)
192
Hex
Hex
Hex
16
17
18
Address
Address
Address
Bits
15:8
Bits
15:8
Bits
15:8
7:0
7:0
7:0
PHY_AID
PHY_AID
Noise Events
PHY_NOISE_CTRL1
Noise Ceiling
PHY_NOISE_CTRL2
Noise Attack
Reserved
Noise Floor
Table 70. HPR24: HomePNA PHY Noise Control 2 (Register 24)
Table 69. HPR23: HomePNA PHY Noise Control (Register 23)
Mnemonic
Mnemonic
Mnemonic
Table 68. HPR22: HomePNA PHY AID (Register 22)
The Address ID of this PHY
If PHY_Control Disable AID Negotiation is
not set then writes to this bit will have no
effect.
An 8-bit counter that records the number of
noise events detected. Overflows are held
as FFh. Can be cleared by setting bit 6 of
the control register.
The minimum value of the NOISE
measurement.
The maximum value if the NOISE
measurement. If it is exceeded, NOISE is
reset to the FLOOR.
Sets the attack characteristics of the
NOISE algorithm. High nibble sets number
of noise events needed to raise the NOISE
level immediately, while the low nibble is the
number of noise events needed to raise the
level at the end of an 870 ms period.
Reads will produce undefined results
Am79C978A
Description
Description
Description
above EFh are reserved. Address FFh is defined to in-
dicate a remote command.
Read/
Read/
Read/
Write
Write
Write
R/W
R/W
R/W
R/W
R/W
R/W
Default
Default
Default
Hex
Hex
Hex
00
00
03
FF
F4
Reset
Reset
Reset
Soft
Soft
Soft
FF
00
00
03
F4