TNETE2008

OctalPHY

EIGHT 10BASE-T PHYSICAL-LAYER INTERFACES

SPWS042B – DECEMBER 1997 – REVISED JUNE 1998

26

POST OFFICE BOX 655303

receive-data timing

The TNETE2008 buffers receive data in an elastic first-in, first-out (FIFO) buffer so that receive data can be

synchronous to the TNETE2008 20-MHz clock.

receive data (see Figure 15)

NO.

PARAMETER

MIN

TYP

MAX

UNIT

1

td(RDLAT)

Receive-data latency time

1350

1950

2550

ns

2

td(CRS)

Carrier sense assertion delay

125

850

1300

ns

3

td(RDV)

Delay time, from RCVP/RCVN valid to IFRXD valid

1800

2850

3800

ns

4

td(CRSHO)

Delay time, from RCVP/RCVN idle to IFCRS

↓

0

0

450

ns

RCVP/

RCVN

(input)

IFCLK

(output)

IFSYNC

(output)

IFCRS

(output)

IFRXDV

(output)

2

4

3

1

Figure 15. Receive Data