cx82100 Conexant Systems, Inc., cx82100 Datasheet - Page 125

• Manufacturer Part Number: cx82100
• Description: Home Network Processor Hnp
• Manufacturer: Conexant Systems, Inc.

7.9
Table 7-9. 7-WS Interface Signals
101306C
RXD
RCLK
RENA
TXD
TCLK
TENA
CLSN
7-WS Signal
EMx_RXD0
EMx_RX_CLK
EMx_RXCRS
EMx_TXD0
EMx_TX_CLK
EMx_TXEN
EMx_COL
7-Wire Serial Interface (7-WS)
MII Signal
Conexant Proprietary and Confidential Information
This mode is enabled by setting bit 7 of the EMAC x Network Access register
(E_NA_{x}). In this mode the MII interface works in serial mode and is designed to
interface to Conexant’s CX24611 HomePNA 2.0 PHY/AFE or to any other GPSI
interface (AMD's "General Purpose Serial Interface," a de facto standard for MAC-to-
10Base-T device interface). All MII signals function the same way as in Ethernet mode
except that the 4-bit data is serialized on pins EMx_TXD0 and EMx_RXD0, and
EMx_TXD0 and EMx_TXEN are driven from the negative edge of EMx_TX_CLK.
Table 7-9 describes the signals for the 7-WS interface.
CX82100 Home Network Processor Data Sheet
Input
Input
Input
Output
Input
Output
Input
Direction
Receive Data.
Receive input bit stream.
Receive Clock.
A 10 MHz square wave synchronized to the Receive Data and only active
while receiving an input bit stream.
Receive Enable.
A logical input that indicates the presence of carrier on the channel.
Transmit Data.
Transmit output bit stream.
Transmit Clock.
10 MHz clock.
Transmit Enable.
Transmit output bit stream enable. While asserted, it enables valid
transmit output (TXD).
Collision.
A logical input that indicates that a collision is occurring on the channel.
Description
7-27