IDT70T633 Integrated Device Technology, IDT70T633 Datasheet - Page 16

• Manufacturer Part Number: IDT70T633
• Description: 512k X 18, 3.3v/2.5v Dual-port Ram, Interleaved I/o
• Manufacturer: Integrated Device Technology

Timing Waveform of Semaphore Read after Write Timing, Either Side
NOTES:
1. CE
2. "DATA
Timing Waveform of Semaphore Write Contention
NOTES:
1. D
2. All timing is the same for left and right ports. Port "A" may be either left or right port. "B" is the opposite from port "A".
3. This parameter is measured from R/W
4. If t
IDT70T633/1S
High-Speed 2.5V 512/256K x 18 Asynchronous Dual-Port Static RAM
appropriate UB/LB controls.
SEM
OR
A
SPS
0
= V
R/W
= D
0
-A
I/O
OE
OUT
is not satisfied,the semaphore will fall positively to one side or the other, but there is no guarantee which side will be granted the semaphore flag.
IH
OL
(1)
2
and CE
VALID" represents all I/O's (I/O
= V
IL
, CE
1
SIDE
SIDE
= V
0L
IL
= CE
are required for the duration of both the write cycle and the read cycle waveforms shown above. Refer to Truth Table II for details and for
(2)
(2)
0R
"A"
"B"
= V
t
IH
VALID ADDRESS
AS
; CE
"A"
A
A
t
AW
or SEM
1L
0"A"
0"B"
0
Write Cycle
= CE
- I/O
SEM
SEM
R/W
R/W
-A
-A
t
17
"A"
t
1R
2"A"
2"B"
WP
EW
) equal to the semaphore value.
DATA
"A"
"A"
"B"
"B"
= V
going HIGH to R/W
IL
. Refer also to Truth Table II for appropriate UB/LB controls.
t
DW
t
IN
WR
VALID
t
DH
MATCH
"B"
or SEM
t
16
SWRD
MATCH
"B"
going HIGH.
t
VALID ADDRESS
SPS
t
t
SOP
Read Cycle
SOP
t
SAA
Industrial and Commercial Temperature Ranges
(1,3,4)
t
t
SOE
ACE
DATA
VALID
5670 drw 13
OUT
t
OH
(2)
.
5670 drw 12
(1)
.