CY7C024-25JXCT Cypress Semiconductor Corp, CY7C024-25JXCT Datasheet - Page 6

• Manufacturer Part Number: CY7C024-25JXCT
• Description: IC SRAM 64KBIT 25NS 84PLCC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C024-25JXCT

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 64K (4K x 16)
• Speed: 25ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 84-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Document #: 38-06035 Rev. *C
Table 2. Interrupt Operation Example (Assumes BUSY
Table 3. Semaphore Operation Example
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:
6. A
7. If BUSY
8. If BUSY
0L–12L
and A
R
L
=L, then no change.
=L, then no change.
L
Function
R
Flag
0R–12R
L
Flag
Function
R
Flag
Flag
, 1FFF/1FFE for the CY7C025.
I/O
0
–I/O
Left
1
0
0
1
1
0
1
1
1
0
1
R/W
X
X
X
L
15/17
L
CE
X
X
L
L
I/O
L
0
Right
–I/O
L
Left Port
=BUSY
OE
1
1
1
0
0
1
1
0
1
1
1
X
X
X
L
15/17
L
R
A
(1)FFE
(1)FFF
=HIGH)
0L–11L
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
X
X
[6]
INT
H
L
X
X
[7]
[8]
L
R/W
X
X
L
X
R
CE
Status
X
L
L
X
R
Right Port
OE
CY7C024/0241
CY7C025/0251
X
L
X
X
R
A
(1)FFF
(1)FFE
0R–11R
X
X
Page 6 of 21
INT
H
L
X
X
[8]
[7]
R
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