CY7C144AV-25AC Cypress Semiconductor Corp, CY7C144AV-25AC Datasheet - Page 16

• Manufacturer Part Number: CY7C144AV-25AC
• Description: IC SRAM 64KB DUAL 64-TQFP
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C144AV-25AC

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 64K (8K x 8)
• Speed: 25ns
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Table 1. Non-Contending Read/Write
Table 2. Interrupt Operation Example (assumes BUSY
Table 3. Semaphore Operation Example
Document #: 38-06051 Rev. *C
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
Note:
45. See Functional Description for specific addresses by device part number.
46. If BUSY
47. If BUSY
CE
H
H
H
X
L
L
L
Function
L
R
R/W
= L, then no change.
= L, then no change.
H
H
X
X
X
Function
L
L
R
Flag
Inputs
L
Flag
R
Flag
Flag
OE
X
H
X
X
X
L
L
R/W
X
X
X
L
SEM
H
X
H
H
L
L
L
L
CE
I/O
X
X
High Z
Data Out
High Z
Data In
Data Out
Data In
L
L
L
0
–I/O
I/O
Outputs
1
0
0
1
1
0
1
1
1
0
1
OE
8
0
X
X
X
L
–I/O
Left
Left Port
L
8
I/O
1FFE
A
FFF
0
Deselected: Power-Down
Read Data in Semaphore Flag
I/O Lines Disabled
Write into Semaphore Flag
Read
Write
Not Allowed
–I/O
0L–14L
L
X
X
1
1
1
0
0
1
1
0
1
1
1
= BUSY
[45]
8
[45]
Right
R
= 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
Semaphore free
Right port has semaphore token
Semaphore free
Left port has semaphore token
Semaphore free
INT
H
L
X
X
[47]
[46]
L
R/W
X
X
X
L
R
CY7C138AV/144AV/006AV
CY7C139AV/145AV/016AV
Operation
CE
X
X
L
L
R
Status
OE
CY7C007AV/017AV
X
X
X
L
Right Port
R
1FFE
A
FFF
0R–14R
X
X
[45]
[45]
Page 16 of 20
INT
H
L
[46]
X
X
[47]
R