Intel IXF1104 manual Transmit Timing, Receive Timing

Intel® IXF1104 4-Port Gigabit Ethernet Media Access Controller

5.2.2.1Transmit Timing

In MPHY mode a packet transmission starts with the TSX signal indicating port address information is on the data bus. The next clock cycle TENB and TSOP indicate present data on the bus is the first word in the packet and all subsequent clocks will contain valid data as long as TENB is active or until TEOP is asserted. Data transmission can be temporally halted when TENB goes high then resumed when TENB is low. The valid bytes in the final word, during an active TEOP, are indicated by state of TMOD [1:0].

Figure 11. MPHY Transmit Logical Timing

TFCLK

TENB

TSOP

TEOP

TMOD [1:0]

TERR

TSX

TDAT [31:0]

TPRTY

0000 B0-B3 B4-B7B44-B47 B48-B51 B52-B55B56-B59 B60-B64 0001 B0-B3 B4-B7

B3216-02

1.Applies to all transmit packet available signals (STPA, PTPA, DTPA_0:3).

5.2.2.2Receive Timing

A packet is received when RSX indicates port address information on the data bus followed by RSOP to indicate the data bus contains the first word of a packet. All subsequent data is valid only while RVAL is High and until REOP is asserted. Receive data can be temporarily halted when RENB is de-asserted and starts again on the second rising edge of RFCLK following the assertion of RENB. RMOD indicates the number of valid bytes in the last transfer when REOP is asserted.

85 Datasheet

Document Number: 278757

Revision Number: 009

Revision Date: 27-Oct-2005