TNETX3270PGV datasheet(12/66 Pages) TI1

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TNETX3270

ThunderSWITCH

™ 24/3 ETHERNET™ SWITCH

WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS

SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

Terminal Functions (Continued)

miscellaneous

TERMINAL

I/O

INTERNAL

DESCRIPTION

NAME

NO.

I/O

RESISTOR

DESCRIPTION

OSCIN

112

None

Master system clock input (83.33-MHz input clock)

RESET

115

None

Reset. RESET is synchronous and, therefore, the system clock must be operational during reset.

power interface

TERMINAL

INTERNAL

DESCRIPTION

NAME

NO.

RESISTOR

DESCRIPTION

GND

8, 14, 34, 40, 55, 68, 74, 81, 88, 94, 100,

128, 134, 141, 148, 154, 160, 175, 188,

194, 201, 208, 214, 220, 235

None

Ground. GND is the 0-V reference for the device. All GND

terminals must be connected.

VDD(3.3V)

12, 72, 109, 122, 132, 163, 169, 192, 229

None

3.3-V supply voltage. Power for the input, output, and I/O

terminals.

VDD(2.5V)

4, 17, 31, 45, 58, 64, 77, 91,

105, 118, 124, 137, 151, 165, 178,

184, 197, 211, 225, 238

None

2.5-V supply voltage. Power for the core.

summary of signal terminals by signal group function

PORT DESCRIPTION

NUMBER OF

SIGNALS

MULTIPLIER

TOTAL

LED

10-Mbit/s port

10-/100-Mbit/s port

DIO

EEPROM interface

DRAM interface

Miscellaneous

JTAG

Serial MII management

Total signals

186

SUMMARY

Assigned terminals

186

VDD(3.3V)

VDD(2.5V)

GND

Total terminals

240

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