DP83266 datasheet(132/152 Pages) NSC

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80 Signal Descriptions (Continued)

82 PHY INTERFACE

The PHY Interface signals transfer symbol pairs between the MACSI and PLAYERa devices Transfers are synchronous using

the 125 MHz Local Byte Clock signal (signal provided by the PLAYERa device)

A control bit is used to indicate if a Data symbol pair or Control symbol pair or a mixed ControlData symbol pair are being

transferred

Parity is generated on the PH

Indicate and MA

Indicate data Parity is checked on the PH

Request and MA

Request data

Symbol

Description

PRP

122

PHY Request Parity

Odd parity for PRC and PRD7 – 0

PRC

120

PHY Request Control

Indicates PRD7 – 0 contains a Data symbol pair

Indicates PRD7 – 0 contains a Control or mixed ControlData symbol pair

PRD7 – PRD0

118 116 114

PHY Request Data

Contains a Data or Control symbol pair

110 108 106

104 102

PIP

123

PHY Indicate Parity

Odd parity for PIC and PID7 – 0

PIC

121

PHY Indicate Control

Indicates PRD7 – PRD0 contains a Data symbol pair

Indicates PRD7 – PRD0 contains a Control or mixed ControlData symbol pair

PID7 – PID0

119 117 115

PHY Indicate Data

Contains a Data or a mixed ControlData symbol pair

111 109 107

105 103

132

DP83266 Datasheet(PDF) 132 Page - National Semiconductor (TI)

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