CY7C008-20AC Cypress Semiconductor Corp, CY7C008-20AC Datasheet - Page 16

• Manufacturer Part Number: CY7C008-20AC
• Description: IC SRAM 512KBIT 20NS 100LQFP
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C008-20AC

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 512K (64K x 8)
• Speed: 20ns
• 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: 428-1146

Table 1. Non-Contending Read/Write
Table 2. Interrupt Operation Example (assumes BUSY
Table 3. Semaphore Operation Example
Notes:
Document #: 38-06041 Rev. *A
42. A
43. If BUSY
44. If BUSY
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
CE
H
H
X
H
L
L
L
0L–16L
Function
and A
R
L
R/W
=L, then no change.
=L, then no change.
X
H
X
H
X
Function
L
L
Flag
R
0R–16R
Inputs
L
Flag
R
Flag
Flag
, 1FFFF/1FFFE for the CY7C009/019.
OE
X
H
X
X
X
L
L
R/W
X
X
X
L
SEM
L
H
X
H
H
L
L
L
CE
X
X
L
L
I/O
High Z
Data Out
High Z
Data In
Data Out
Data In
L
0
–I/O
Outputs
I/O
1
0
0
1
1
0
1
1
1
0
1
OE
X
X
X
L
8
0
–I/O
Left
Left Port
L
8
FFFF (or 1FFFF)
FFFE (or 1FFFE)
I/O
A
0
0L–16L
Deselected: Power-Down
Read Data in Semaphore Flag
I/O Lines Disabled
Write into Semaphore Flag
Read
Write
Not Allowed
–I/O
X
X
L
1
1
1
0
0
1
1
0
1
1
1
=BUSY
8
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
[43]
[44]
L
[42]
R/W
X
X
X
L
R
CE
Operation
X
X
L
L
R
OE
Status
X
X
X
L
Right Port
R
FFFF (or 1FFFF)
FFFE (or 1FFFE)
CY7C008/009
CY7C018/019
A
0R–16R
X
X
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INT
H
L
[44]
X
X
[43]
R