DM9801A datasheet(19/60 Pages) DAVICOM

Part #	DM9801A

Description	1M Home Phoneline Network Physical Layer Single Chip Transceiver

PDF	60 Pages

Scroll/Zoom	100%

Manufacturer	DAVICOM [Davicom Semiconductor, Inc.]

Direct Link	http://www.davicom.com.tw

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19 / 60 page

DM9801A

1M Home Phoneline Network Physical Layer Single Chip Transceiver

Final

Version: DM9801A-DS-F01

May 30, 2001

General Purpose Serial Interface (continued)

STDCLK

SRDCLK

STXEN

STXDAT

CRS

SRXDAT

CLSN

Once STXEN is cleared, the last symbol gets encoded and transmitted. The looped-back data is presented back to the MAC

and sometime later CRS falls. Once CRS falls, STDCLK and SRDCLK toggle for 97 clocks after which the system returns to

the Idle state.

TXPKT - STXEN Cleared

Figure 16

STDCLK

SRDCLK

STXEN

STXDAT

CRS

SRXDAT

CLSN

CLSN will be asserted some time after the preamble and SFD have been clocked in. STDCLK and SRDCLK are then clocked

until CRS drops. STXEN drops sometime after CLSN was asserted. CRS and CLSN are dropped together after more than

500 clocks. STDCLK and SRDCLK keep toggling for approximately another 100 clock cycles, then the system returns to the

idle state.

TXPKT - CLSN Asserted

Figure 17

DM9801A Datasheet(PDF) 19 Page - Davicom Semiconductor, Inc.