IDT71215 데이터 시트보기 (PDF) - Integrated Device Technology

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IDT71215

BiCMOS StaticRAM 240K (16K x 15-BIT) CACHE-TAG RAM For the Pentium™ Processor

Integrated Device Technology 

IDT71215

BiCMOS 16Kx15 CACHE-TAG RAM

TRUTH TABLES

COMMERCIAL TEMPERATURE RANGE

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

CS2 CLK CS1

RESET PWRDN

WET WES BRDYOE

CHIP SELECT FUNCTION

TAG VLDOUT DTYOUT WTOUT MATCH

BRDY OPERATION POWER

HX X

H

XX X

X

Hi-Z Hi-Z

XL X

H

XX X

X

Hi-Z Hi-Z

LH X

H

XX X

X

–

–

RESET FUNCTION

LH L

H

↑HH

L

Hi-Z L(3)

LH L

H

↑HH

H

Hi-Z L(3)

HX L

H

↑HH

X

Hi-Z Hi-Z

XL L

H

↑HH

X

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, W/R, BRDYH, BRDYIN and SFUNC are "X" for this table.

3. OES is LOW.

Hi-Z

Hi-Z

Hi-Z

–

L(3)

L(3)

Hi-Z

Hi-Z

–

–

Hi-Z

Hi-Z Hi-Z

Hi-Z Hi-Z

–

–

L(3)

L(3)

Hi-Z

Hi-Z

–

–

L(3)

L(3)

Hi-Z

Hi-Z

–

–

Hi-Z Hi-Z

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

3075 tbl 02

READ AND WRITE FUNCTIONS(1, 2)

OET OES WET WES CLK W/R 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:

3075 tbl 03

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. , BRDYOE BRDYH, BRDYIN 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.

14.3

4

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