CY7C025-15AC Cypress Semiconductor Corp, CY7C025-15AC Datasheet - Page 16

• Manufacturer Part Number: CY7C025-15AC
• Description: IC SRAM 128KBIT 15NS 100LQFP
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C025-15AC

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 128K (8K x 16)
• Speed: 15ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1157

Table 1. Non-Contending Read/Write
Table 2. Interrupt Operation Example (assumes BUSY
Table 3. Semaphore Operation Example
Document #: 38-06035 Rev. **
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. A
41. If BUSY
42. If BUSY
CE
H
X
X
H
X
H
X
L
L
L
L
L
L
L
L
0L–12L
R/W
and A
R
L
=L, then no change.
X
X
H
H
H
X
H
H
X
X
=L, then no change.
L
L
L
L
Function
Flag
R
L
0R–12R
Function
Flag
R
Flag
Flag
OE
, 1FFF/1FFE for the CY7C025.
X
X
X
X
X
H
X
X
X
X
L
L
L
L
L
Inputs
UB
X
H
H
H
X
X
H
X
H
X
L
L
L
L
L
I/O
LB
H
H
H
H
H
X
X
X
X
X
L
L
L
L
L
0
–I/O
Left
1
0
0
1
1
0
1
1
1
0
1
R/W
X
X
X
L
15/17
SEM
L
H
H
H
H
H
H
H
H
X
L
L
L
L
L
L
CE
X
X
L
L
I/O
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
0
Right
–I/O
I/O
L
Left Port
=BUSY
OE
1
1
1
0
0
1
1
0
1
1
1
X
X
X
L
0
–I/O
15/17
L
7
R
A
(1)FFE
[2]
(1)FFF
=HIGH)
0L–11L
Outputs
X
X
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
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
[40]
I/O
INT
H
L
X
X
8
[41]
[42]
–I/O
L
15
R/W
[3]
X
X
L
X
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
CE
Status
X
X
L
L
R
Right Port
IN0
IN0
CY7C024/0241
CY7C025/0251
OE
X
X
X
L
into Semaphore Flag
into Semaphore Flag
Operation
R
A
(1)FFE
(1)FFF
0R–11R
X
X
Page 16 of 20
INT
H
L
[42]
X
X
[41]
R