TNETX3100 datasheet(10/80 Pages) TI1

10 / 80 page

TNETX3100

ThunderSWITCH™ 10-PORT 10-/100-MBIT/S ETHERNET™ SWITCH

SPWS031D – JUNE 1997 – REVISED OCTOBER 1997

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

Terminal Functions (Continued)

EAM interface

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

EAM15

(mode select)

External address match. When EAM15 is high and EAM04 is low, it indicates that the least-significant

nibble EAM03–EAM00 contains a routing code for the single-selected port.

EAM00

EAM01

EAM02

EAM03

External address match When EAM15 is low a high on EAM00 EAM09 indicates the data frame

EAM04

External address match. When EAM15 is low, a high on EAM00–EAM09 indicates the data frame

is transmitted from that single-selected port.

EAM05

is transmitted from that single selected ort.

EAM00 is the least-significant bit and is associated with port 00.

EAM06

EAM00 is the least significant bit and is associated with ort 00.

EAM07

EAM08

EAM09

DIO and statistics interface

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

SAD0

143

DIO address SAD0 SAD1 selects the TNETX3100 host registers

SAD1

145

DIO address. SAD0–SAD1 selects the TNETX3100 host registers.

SCS

132

DIO chip select. When low, SCS indicates a port access is valid.

SDATA0

134

SDATA1

136

SDATA2

137

SDATA3

138

I/O

DIO data SDATA0 SDATA7 is bidirectional byte wide data

SDATA4

139

I/O

DIO data. SDATA0–SDATA7 is bidirectional byte-wide data.

SDATA5

140

SDATA6

141

SDATA7

142

SRDY

130

DIO ready. When low, SRDY indicates to the host that data is ready to be read. SRDY also indicates

when data has been received for the write cycle. TNETX3100 drives SRDY high for one clock cycle

before placing the output in the high-impedance (Z) state after SCS is taken high. SRDY should be

pulled high with an external pullup resistor.

SRNW

131

DIO read not write. When low, SRNW indicates a write cycle on the DIO port.

TNETX3100 Datasheet(PDF) 10 Page - Texas Instruments

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