CY7C026A-15AXI Cypress Semiconductor Corp, CY7C026A-15AXI Datasheet - Page 16

• Manufacturer Part Number: CY7C026A-15AXI
• Description: CY7C026A-15AXI
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C026A-15AXI

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 256K (16K x 16)
• Speed: 15ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 1. Non-Contending Read/Write
Table 2. Interrupt Operation Example (assumes BUSY
Table 3. Semaphore Operation Example
Document #: 38-06046 Rev. *F
Set right INT
Reset right INT
Set left INT
Reset left INT
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
Notes
40. If BUSY
41. If BUSY
CE
H
H
H
X
L
L
L
L
L
L
X
X
X
L
L
Function
L
R
=L, then no change.
R/W
=L, then no change.
L
X
X
H
H
H
X
H
H
X
X
L
L
L
Function
R
flag
L
flag
R
flag
flag
OE
X
X
X
X
X
H
X
X
X
X
L
L
L
L
L
Inputs
R/W
X
X
X
L
UB
H
H
H
H
H
X
L
L
L
L
X
X
X
L
X
L
CE
I/O
X
X
L
L
L
LB
0
H
H
H
H
H
X
L
L
L
L
X
X
X
X
L
–I/O
1
0
0
1
1
0
1
1
1
0
1
OE
15
X
X
X
L
Left
L
Left Port
SEM
H
H
H
H
H
H
H
H
X
L
L
L
L
L
L
I/O
0
High Z
High Z
Data in
High Z
Data in
Data out
High Z
Data out
High Z
Data out
Data out
Data in
Data in
A
–I/O
3FFF
3FFE
L
0L–13L
= BUSY
X
X
1
1
1
0
0
1
1
0
1
1
1
I/O
15
Right
8
–I/O
R
15
= HIGH)
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
Right port has semaphore token
Semaphore free
Left port has semaphore token
Semaphore free
Semaphore free
Outputs
INT
H
L
[40]
X
X
[41]
L
High Z
High Z
High Z
Data in
Data in
High Z
Data out
Data out
High Z
Data out
Data out
Data in
Data in
R/W
I/O
X
X
X
L
0
R
–I/O
7
CE
X
X
L
L
R
Deselected: Power-down
Deselected: Power-down
Write to upper byte only
Write to lower byte only
Write to both bytes
Read upper byte only
Read lower byte only
Read both bytes
Outputs disabled
Read data in semaphore flag
Read data in semaphore flag
Write D
Write D
Not allowed
Not allowed
OE
Status
X
X
X
L
Right Port
R
IN0
IN0
into semaphore flag
into semaphore flag
Operation
A
3FFF
3FFE
0R–13R
X
X
CY7C026A
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INT
H
L
[41]
[40]
X
X
R
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