IDT70V05 Integrated Device Technology, IDT70V05 Datasheet - Page 12

• Manufacturer Part Number: IDT70V05
• Description: High-speed 3.3v 8k X 8 Dual-port Static Ram
• Manufacturer: Integrated Device Technology

Timing Waveform of Semaphore Read after Write Timing, Either Side
NOTE:
1. CE = V
2. “DATA
Timing Waveform of Semaphore Write Contention
NOTES:
1. D
2. “A” may be either left or right port. “B” is the opposite port from “A”.
3.
4. If t
DATA
IDT70V05S/L
High-Speed 3.3V 8K x 8 Dual-Port Static RAM
A
This parameter is measured from R/W
SEM
OR
R/W
0
SPS
OE
-A
= D
2
0
is not satisfied, the semaphore will fall positively to one side or the other, but there is no guarantee which side will obtain the flag.
OUT
IH
OL
for the duration of the above timing (both write and read cycle).
VALID” represents all I/O's (I/O
= V
IL
, CE
R
= CE
SIDE
SIDE
L
= V
(2)
(2)
IH
t
AS
, Semaphore Flag is released from both sides (reads as ones from both sides) at cycle start.
"A"
"B"
VALID ADDRESS
“A”
t
AW
or SEM
0
-I/O
A
A
Write Cycle
0"A"
0"B"
7
) equal to the semaphore value.
SEM
SEM
t
t
R/W
R/W
EW
WP
“A”
-A
-A
going HIGH to R/W
DATA
2"A"
2"B"
"A"
"A"
"B"
"B"
t
DW
IN
t
WR
VALID
t
DH
“B”
MATCH
or SEM
6.42
t
SWRD
12
“B”
t
SOP
going HIGH.
MATCH
VALID ADDRESS
t
SOP
Read Cycle
t
t
SAA
SPS
Industrial and Commercial Temperature Ranges
(1,3,4)
t
t t
AOE
ACE
DATA
VALID
2941 drw 11
OUT
(2)
t
OH
2941 drw 10
(1)