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CY7C1513AV18 Datasheet(PDF) 6 Page - Cypress Semiconductor

Part # CY7C1513AV18
Description  72-Mbit QDR??II SRAM 4-Word Burst Architecture
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C1513AV18 Datasheet(HTML) 6 Page - Cypress Semiconductor

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CY7C1511AV18, CY7C1526AV18
CY7C1513AV18, CY7C1515AV18
Document Number: 001-06985 Rev. *C
Page 6 of 31
Pin Definitions
Pin Name
IO
Pin Description
D[x:0]
Input-
Synchronous
Data Input Signals. Sampled on the rising edge of K and K clocks when valid write operations are active.
CY7C1511AV18
− D
[7:0]
CY7C1526AV18
− D
[8:0]
CY7C1513AV18
− D
[17:0]
CY7C1515AV18
− D
[35:0]
WPS
Input-
Synchronous
Write Port Select
− Active LOW. Sampled on the rising edge of the K clock. When asserted active, a
write operation is initiated. Deasserting deselects the write port. Deselecting the write port ignores D[x:0].
NWS0,
NWS1,
Input-
Synchronous
Nibble Write Select 0, 1
− Active LOW (CY7C1511AV18 Only). Sampled on the rising edge of the K
and K clocks when write operations are active. Used to select which nibble is written into the device during
the current portion of the write operations. NWS0 controls D[3:0] and NWS1 controls D[7:4].
All the Nibble Write Selects are sampled on the same edge as the data. Deselecting a Nibble Write Select
ignores the corresponding nibble of data and it is not written into the device.
BWS0,
BWS1,
BWS2,
BWS3
Input-
Synchronous
Byte Write Select 0, 1, 2 and 3
− Active LOW. Sampled on the rising edge of the K and K clocks when
write operations are active. Used to select which byte is written into the device during the current portion
of the write operations. Bytes not written remain unaltered.
CY7C1526AV18
− BWS
0 controls D[8:0]
CY7C1513AV18
− BWS
0 controls D[8:0] and BWS1 controls D[17:9].
CY7C1515AV18
− BWS
0 controls D[8:0], BWS1 controls D[17:9],
BWS2 controls D[26:18] and BWS3 controls D[35:27].
All the Byte Write Selects are sampled on the same edge as the data. Deselecting a Byte Write Select
ignores the corresponding byte of data and it is not written into the device.
A
Input-
Synchronous
Address Inputs. Sampled on the rising edge of the K clock during active read and write operations. These
address inputs are multiplexed for both read and write operations. Internally, the device is organized as
8M x 8 (4 arrays each of 2M x 8) for CY7C1511AV18, 8M x 9 (4 arrays each of 2M x 9) for CY7C1526AV18,
4M x 18 (4 arrays each of 1M x 18) for CY7C1513AV18 and 2M x 36 (4 arrays each of 512K x 36) for
CY7C1515AV18. Therefore, only 21 address inputs are needed to access the entire memory array of
CY7C1511AV18 and CY7C1526AV18, 20 address inputs for CY7C1513AV18 and 19 address inputs for
CY7C1515AV18. These inputs are ignored when the appropriate port is deselected.
Q[x:0]
Outputs-
Synchronous
Data Output Signals. These pins drive out the requested data when the read operation is active. Valid
data is driven out on the rising edge of the C and C clocks during read operations, or K and K when in
single clock mode. On deselecting the read port, Q[x:0] are automatically tri-stated.
CY7C1511AV18
− Q
[7:0]
CY7C1526AV18
− Q
[8:0]
CY7C1513AV18
− Q
[17:0]
CY7C1515AV18
− Q
[35:0]
RPS
Input-
Synchronous
Read Port Select
− Active LOW. Sampled on the rising edge of positive input clock (K). When active, a
read operation is initiated. Deasserting deselects the read port. When deselected, the pending access is
allowed to complete and the output drivers are automatically tri-stated following the next rising edge of
the C clock. Each read access consists of a burst of four sequential transfers.
C
Input Clock
Positive Input Clock for Output data. C is used in conjunction with C to clock out the read data from
the device. C and C can be used together to deskew the flight times of various devices on the board back
to the controller. See Application Example on page 10 for further details.
C
Input Clock
Negative Input Clock for Output data. C is used in conjunction with C to clock out the read data from
the device. C and C can be used together to deskew the flight times of various devices on the board back
to the controller. See Application Example on page 10 for further details.
K
Input Clock
PositiveInput Clock Input. The rising edge of K is used to capture synchronous inputs to the device and
to drive out data through Q[x:0] when in single clock mode. All accesses are initiated on the rising edge of K.
K
Input Clock
Negative Input Clock Input. K is used to capture synchronous inputs being presented to the device and
to drive out data through Q[x:0] when in single clock mode.
CQ
Echo Clock
CQ Referenced with Respect to C. This is a free running clock and is synchronized to the input clock
for output data (C) of the QDR-II. In the single clock mode, CQ is generated with respect to K. The timings
for the echo clocks are shown in the Switching Characteristics on page 24.
[+] Feedback


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