AM79C978VCSLASHW datasheet(183/261 Pages) AMD

183 / 261 page

Am79C978

183

HPR17: HomePNA Status Control (Register 17)

Table 51.

HPR17: HomePNA Status Control (Register 17)

HPR18 and HPR19: HomePNA PHY TxCOMM

(Registers 18 and 19)

Table 52.

HPR18 and HPR19: HomePNA PHY TxCOMM (Registers 18 and 19)

The 32-bit transmitted data field is to be used for out-

of-band communication between PHY management

entities. No protocol for out-of-band management has

been defined. Accessing the low word causes the PHY

to send all-0 PCOMs until the high word has been ac-

cessed. Once accessed, the next transmitted packet

will cause this register’s contents to be shifted out in

the PCOM field of the transmitted packet. Upon trans-

mission, this register will read back as all 0s. A non-null

transmitted PCOM will set the TxPCOM Ready bit in

the Event Status Register (Register HPR26). An ac-

cess to any of the two TxPCOM words will clear the Tx-

PCOM Ready bit in the ISTAT register.

Bits

Mnemonic

Description

Read/

Write

Default

Hex

Soft

Reset

15:13

Reserved

Reads will produce undefined results;

Writes = 0

R/W

Any1home

1 = Any1Home Link Packet Disable

0 = Any1Home Link Packet Enable

R/W

11:7

Reserved

Reads will produce undefined results;

Writes = 0

R/W

Received_Power

1 = Last packet received was sent at high power

0 = Last packet received was sent at low power

Received_Speed

1 = Last packet received was sent at high power

0 = Last packet received was sent at low power

Received_Ver

1 = Last packet received was sent at Version

3:0

Reserved

Reads will produce undefined results;

Writes = 0

R/W

Hex

Mnemonic

Description

Read/

Write

Default

Hex

Soft

Reset

12-13

PHY_TX_COMM (4)

The 32-bit preamble transmitted on the

HomePNA PHY. Register 12 contains the high

word and Register 13 the low word.

R/W

All 0s

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