IDT71215 Integrated Device Technology, IDT71215 Datasheet - Page 4

• Manufacturer Part Number: IDT71215
• Description: BiCMOS StaticRAM 240K (16K x 15-BIT) CACHE-TAG RAM For the PentiumO Processor
• Manufacturer: Integrated Device Technology

IDT71215
BiCMOS 16Kx15 CACHE-TAG RAM
TRUTH TABLES
RESET FUNCTION
READ AND WRITE FUNCTIONS
READ FUNCTION
WRITE FUNCTION
NOTES:
1. "H" = V
2. This table applies when
3. D
CS1
POWER-DOWN FUNCTION
CS1
CHIP SELECT FUNCTION
NOTES:
1. "H" = V
2.
3.
CHIP SELECT, RESET, AND POWER-DOWN FUNCTIONS
OET
OET
H
X
H
X
X
X
X
L
L
L
X
H
X
H
X
X
L
L
OET
OES
OUT
CS2
,
H
H
H
X
L
X
L
X
X
X
is LOW.
in this case is the same as D
OES
OES
OES
IH
H
H
X
L
X
X
X
L
IH
, "L" = V
, "L" = V
RESET
RESET PWRDN
, W/
X
X
X
X
L
L
L
L
L
L
WET
WET
R
H
X
X
X
X
X
L
L
, BRDYH,
IL
IL
, "X" = don't care, "–" = unrelated.
PWRDN
, "X" = don't care, "–" = unrelated.
WES
WES
H
H
H
H
H
H
H
H
H
L
X
X
X
X
X
X
L
L
CS1
BRDYIN
is LOW and CS2,
CLK
CLK
X
X
X
X
X
X
X
X
IN
and SFUNC are "X" for this table.
WET
; that is, the input data is written through to the outputs during the write operation.
WET WES
X
X
X
H
H
H
H
X
H
L
W/
X
X
X
X
X
X
X
X
R
R
WES BRDYOE
H
H
H
H
H
X
X
X
X
L
D
TAG VLD
RESET
Hi-Z
(1, 2)
D
OUT
–
–
–
–
–
BRDYOE
IN
X
X
X
H
X
X
X
X
X
L
, and
D
D
–
–
–
–
–
–
IN
IN
PWRDN
IN
TAG VLD
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
DTY
–
–
–
D
D
–
–
–
–
–
–
IN
IN
are HIGH.
IN
14.3
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
L
L
–
–
–
WT
(3)
(3)
OUT
D
D
–
–
–
–
–
–
IN
IN
IN
BRDYOE
DTY
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
VLD
L
L
D
–
–
–
D
D
(3)
(3)
Hi-Z
Hi-Z
OUT
OUT
OUT
OUT
–
–
–
OUT
(1, 2)
, BRDYH,
(3)
WT
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
DTY
L
L
D
–
–
–
D
D
(3)
(3)
OUT
Hi-Z
Hi-Z
OUT
OUT
OUT
–
–
–
OUT
(3)
BRDYIN
MATCH
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
L
L
WT
D
–
–
–
(3)
(3)
D
D
Hi-Z
Hi-Z
OUT
OUT
OUT
–
–
–
OUT
COMMERCIAL TEMPERATURE RANGE
and SFUNC are "X" for this table.
(3)
BRDY
BRDY
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
H
–
–
–
MATCH
D
D
D
D
OUT
OUT
OUT
OUT
L
–
L
L
OPERATION POWER
Reset Status
Reset Status
Reset Status
Reset Status
Power-down
Not Allowed
Not Allowed
Deselected
Deselected
Selected
Read Status Bits
Write Status Bits
Write Status Bits
TAG I/O Disable
Status Disabled
Read TAG I/O
Write TAG I/O
OPERATION
Not Allowed
Standby
Active
Active
Active
Active
Active
Active
Active
–
–
3075 tbl 02
3075 tbl 03
4