IDT71216 View Datasheet(PDF) - Integrated Device Technology

Part Name

Description

Manufacturer

IDT71216

BiCMOS StaticRAM 240K (16K x 15-BIT) CACHE-TAG RAM For PowerPC and RISC Processors

Integrated Device Technology 

IDT71216

BiCMOS 16K x 15 CACHE-TAG RAM

TRUTH TABLES

COMMERCIAL TEMPERATURE RANGE

CHIP SELECT, RESET, AND POWER-DOWN FUNCTIONS(1, 2)

CS1 CS2 RESET PWRDN CLK WET WES TAOE TAG VLDOUT DTYOUT WTOUT MATCH

CHIP SELECT FUNCTION

HX X

H

XX X

X

Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z

XL X

H

XX X

X

Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z

LH X

H

XX X

X

RESET FUNCTION

–

–

–

–

–

LH L

H

↑HH

L

Hi-Z L(3)

L(3)

L(3)

L(3)

LH L

H

↑HH

H

Hi-Z L(3)

L(3)

L(3)

L(3)

HX L

H

↑HH

X

Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z

XL L

H

↑HH

X

Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z

XX L

H

↑L X

X

–

–

–

–

–

XX L

H

↑X L

X

POWER-DOWN FUNCTION

–

–

–

–

–

XX X

L

XH H

X

Hi-Z

NOTES:

1. "H" = VIH, "L" = VIL, "X" = don't care, "–" = unrelated.

2. OET, OES, TT1, TAH, TAIN and SFUNC are "X" for this table.

3. OES is LOW.

Hi-Z

Hi-Z

Hi-Z Hi-Z

TA OPERATION POWER

Hi-Z Deselected Active

Hi-Z Deselected Active

–

Selected Active

H Reset Status Active

Hi-Z Reset Status Active

Hi-Z Reset Status Active

Hi-Z Reset Status Active

– Not Allowed –

– Not Allowed –

Hi-Z Power-down Standby

3067 tbl 02

READ AND WRITE FUNCTIONS(1, 2)

OET OES WET WES CLK TT1 TAG VLDIN DTYIN WTIN VLDOUT DTYOUT WTOUT

READ FUNCTION

MATCH

OPERATION

L XHX

X

X

DOUT –

XLXX

XX

–

–

HXXX

XX

Hi-Z –

XHXX

XX

–

–

WRITE FUNCTION

–

–

–

–

–

DOUT Read TAG I/O

–

–

DOUT DOUT DOUT

DOUT Read Status Bits

–

–

–

–

–

DOUT TAG I/O Disable

–

–

Hi-Z Hi-Z Hi-Z

DOUT Status Disabled

HXL X

↑X

DIN

–

–

–

DOUT DOUT DOUT

L

Write TAG I/O

LXLX

↑X

–

–

–

–

–

–

–

–

Not Allowed

XLXL

↑X

–

DIN

DIN DIN DOUT(3) DOUT(3) DOUT(3)

L

Write Status Bits

XHX L

↑X

–

DIN

DIN DIN Hi-Z Hi-Z Hi-Z

L

Write Status Bits

NOTES:

1. "H" = VIH, "L" = VIL, "X" = don't care, "–" = unrelated.

2. This table applies when CS1 is LOW and CS2, RESET, and PWRDN are HIGH. TAOE, TAH, TAIN and SFUNC are "X" for this table.

3. DOUT in this case is the same as DIN; that is, the input data is written through to the outputs during the write operation.

3067 tbl 03

14.3

4

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