DM9801 Datasheet, PDF (18/61 Pages) List of Unclassifed Manufacturers – 1M home Phonrline Network Physical Layer Single Chip Transceiver

DM9801
1M Home Phoneline Network Physical Layer Single Chip Transceiver
General Purpose Serial Interface (continued)
STDCLK
STXEN
STXDAT
SRDCLK
CRS
SRXDAT
CLSN
Once STXEN is asserted, the DM9801 stops SRDCLK, asserts CRS, and toggles STDCLK.
TXPKT - STXEN Asserted
Figure 14
STDCLK
STXEN
STXDAT
SRDCLK
CRS
SRXDAT
CLSN
STDCLK continues to toggle until SFD is observed, as shown in the first section on the above diagram. At this point, STDCLK
is disabled until the AID header has been transmitted on the wire or until CLS has been detected. At this time SRDCLK starts
toggling, thereby shifting 32 bits of preamble and SFD back to the MAC. Sometime later, the STDCLK restarts as symbols get
sent onto the wire in an analogous manner as SRDCLK during packet reception.
TXPKT - SRDCLK Active
Figure 15
18
Preliminary
Version: DM9801-DS-P02
March 20, 2000