TNETX4090 datasheet(68/78 Pages) TI1

Part #	TNETX4090

Description	ThunderSWITCH IIE 9-PORT 100-/1000-MBIT/S ETHERNETE SWITCH

PDF	78 Pages

Scroll/Zoom	100%

Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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68 / 78 page

TNETX4090

ThunderSWITCH II™ 9-PORT 100-/1000-MBIT/S ETHERNET™ SWITCH

SPWS044E – DECEMBER 1997 – REVISED AUGUST 1999

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

RDRAM interface

RDRAM (see Figure 24)

NO.

MIN

MAX

UNIT

tc(DX_CLK)

Cycle time DTX_CLK, DRX_CLK

3.33

2, 3

tw(DX_CLK)

Pulse duration, DTX_CLK, DRX_CLK low or high

45%

55%

tc(DX_CLK)

4, 5

tw(TICK)

Pulse duration, tick time

0.5

tcycle

6, 8

tsu(DBUS_DATA) Setup time, DBUS_DATA before tick

0.35

7, 9

th(DBUS_DATA)

Hold time, DBUS_DATA after tick

0.35

10, 11

td(DBUS_OUT)

Delay time, DBUS_DATA, DBUS_CTRL, DBUS_EN from tick

0.635

1.438

tc(DX_CLK)

tcycle†

Cycle time, internal clock

tc(DX_CLK)

† Not shown in Figure 24 due to scale

DBUS_DATA (in)

DTX_CLK

DRX_CLK

DBUS_CTRL

DBUS_EN

DBUS_DATA (out)

Figure 24. RDRAM

TNETX4090 Datasheet(PDF) 68 Page - Texas Instruments

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