IDT70V07 Integrated Device Technology, IDT70V07 Datasheet - Page 14

• Manufacturer Part Number: IDT70V07
• Description: 32k X 8 3.3v Dual-port
• Manufacturer: Integrated Device Technology

NOTES:
1. Assumes BUSY
2. If BUSY
3. If BUSY
Truth Table IV — Address BUSY
Arbitration
NOTES:
1. Pins BUSY
2. "L" if the inputs to the opposite port were stable prior to the address and enable inputs of this port. "H" if the inputs to the opposite port became stable after the address and
3. Writes to the left port are internally ignored when BUSY
NOTES:
1. This table denotes a sequence of events for only one of the eight semaphores on the IDT70V07.
2. There are eight semaphore flags written to via I/O
3. CE = V
Truth Table III — Interrupt Flag
Truth Table V — Example of Semaphore Procurement Sequence
No Action
Left Port Writes "0" to Semaphore
Right Port Writes "0" to Semaphore
Left Port Writes "1" to Semaphore
Left Port Writes "0" to Semaphore
Right Port Writes "1" to Semaphore
Left Port Writes "1" to Semaphore
Right Port Writes "0" to Semaphore
Right Port Writes "1" to Semaphore
Left Port Writes "0" to Semaphore
Left Port Writes "1" to Semaphore
CE
IDT70V07S/L
High-Speed 32K x 8 Dual-Port Static RAM
X
X
H
L
R/W
pull, not open drain outputs. On slaves the BUSY input internally inhibits writes.
enable inputs of this port. If t
BUSY
L
X
X
X
L
L
R
CE
IH
X
X
H
outputs are driving LOW regardless of actual logic level on the pin.
L
R
L
, SEM = V
R
= V
= V
Inputs
L
and BUSY
IL
IL
CE
, then no change.
Functions
, then no change.
L
X
X
L
L
NO MATCH
L
= BUSY
A
A
MATCH
MATCH
MATCH
0R
IL
0L
-A
-A
to access the semaphores. Refer to the Semaphore Read/Write Control Truth Table.
R
14L
14R
are both outputs when the part is configured as a master. Both are inputs when configured as a slave. BUSY outputs on the IDT70V07 are push-
Left Port
R
OE
=V
X
X
X
L
APS
L
IH
.
is not met, either BUSY
BUSY
(2)
H
H
H
A
L
14L
7FFF
7FFE
Outputs
(1)
X
X
-A
0L
BUSY
0
D
and read from all I/O's (I/O
0
(2)
H
H
H
- D
L
R
outputs are driving LOW regardless of actual logic level on the pin. Writes to the right port are internally ignored when
(1)
INT
1
1
1
1
1
1
1
L
0
0
0
0
7
X
X
H
or BUSY
L
Left
(3)
(2)
L
Write Inhibit
Function
Normal
Normal
Normal
R
= LOW will result. BUSY
R/W
X
X
X
L
2943 tbl 16
(1)
D
R
0
(3)
- D
0
7
1
1
1
1
1
1
1
1
0
0
0
- I/O
14
Right
CE
7
X
L
L
X
). These eight semaphores are addressed by A
R
Semaphore free
Left port has semaphore token
No change. Right side has no write access to semaphore
Right port obtains semaphore token
No change. Left port has no write access to semaphore
Left port obtains semaphore token
Semaphore free
Right port has semaphore token
Semaphore free
Left port has semaphore token
Semaphore free
L
and BUSY
Right Port
OE
X
L
X
X
R
Industrial and Commercial Temperature Ranges
R
outputs can not be LOW simultaneously.
A
14R
7FFF
7FFE
X
X
-A
0R
INT
Status
H
X
X
L
(2)
(3)
R
0
-A
2
Set Right INT
Reset Right INT
Set Left INT
Reset Left INT
.
Function
L
R
Flag
L
(1,2,3)
Flag
R
Flag
Flag
2943 tbl 17
2943 tbl 15