CY7C008-15AXC Cypress Semiconductor Corp, CY7C008-15AXC Datasheet - Page 16
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CY7C008-15AXC
Manufacturer Part Number
CY7C008-15AXC
Description
IC SRAM 512KBIT 15NS 100LQFP
Manufacturer
Cypress Semiconductor Corp
Datasheet
1.CY7C009-15AXC.pdf
(19 pages)
Specifications of CY7C008-15AXC
Format - Memory
RAM
Memory Type
SRAM - Dual Port, Asynchronous
Memory Size
512K (64K x 8)
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
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
CY7C008-15AXC
Manufacturer:
Cypress Semiconductor Corp
Quantity:
10 000
Document #: 38-06041 Rev. *D
register to prevent the semaphore from changing state during
a write from the other port. If both ports attempt to access the
semaphore within t
Table 1. Non-Contending Read/Write
Table 2. Interrupt Operation Example (assumes BUSY
Table 3. Semaphore Operation Example
Notes:
43. A
44. If BUSY
45. 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
H
X
L
L
L
0L–16L
Function
R
L
and A
= L, then no change.
R/W
= L, then no change.
H
H
X
X
X
Function
L
L
0R–16R
R
Flag
Inputs
L
Flag
Flag
R
Flag
, 1FFFF/1FFFE for the CY7C009/019.
OE
SPS
H
X
X
X
X
L
L
of each other, the semaphore will
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
I/O
Outputs
1
1
0
0
1
1
0
1
1
0
1
OE
X
X
X
L
0
8
–I/O
Left
Left Port
L
8
FFFE (or 1FFFE)
FFFF (or 1FFFF)
I/O
A
0
Deselected: Power-Down
Read Data in Semaphore Flag
I/O Lines Disabled
Write into Semaphore Flag
Read
Write
Not Allowed
0L–16L
–I/O
X
X
L
=BUSY
1
1
1
1
0
0
1
1
0
1
1
8
Right
R
definitely be obtained by one side or the other, but there is no
guarantee which side will control the semaphore.
=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
[44]
[45]
L
[43]
R/W
X
X
X
L
R
Operation
CE
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
Page 16 of 19
INT
H
L
X
X
[45]
[44]
R