Cypress CY7C1302CV25-133 9-mbit burst of two pipelined srams with qdrâ ¢ architecture Datasheet

CY7C1302CV25
PREMILINARY
9-Mbit Burst of Two Pipelined SRAMs
with QDR™ Architecture
Features
Functional Description
• Separate independent Read and Write data ports
— Supports concurrent transactions
• 167-MHz clock for high bandwidth
— 2.5 ns clock-to-Valid access time
• 2-word burst on all accesses
• Double Data Rate (DDR) interfaces on both Read and
Write ports (data transferred at 333 MHz) @ 167 MHz
• Two input clocks (K and K) for precise DDR timing
— SRAM uses rising edges only
• Two output clocks (C and C) account for clock skew
and flight time mismatching
• Single multiplexed address input bus latches address
inputs for both Read and Write ports
• Separate Port Selects for depth expansion
• Synchronous internally self-timed writes
• 2.5V core power supply with HSTL Inputs and Outputs
• 13 x 15 x 1.4 mm 1.0-mm pitch fBGA package, 165 ball
(11 x 15 matrix)
• Variable drive HSTL output buffers
• Expanded HSTL output voltage (1.4V–1.9V)
The CY7C1302CV25 is a 2.5V Synchronous Pipelined SRAM
equipped with QDR™ architecture. QDR architecture consists
of two separate ports to access the memory array. The Read
port has dedicated data outputs to support Read operations
and the Write Port has dedicated data inputs to support Write
operations. Access to each port is accomplished through a
common address bus. The Read address is latched on the
rising edge of the K clock and the Write address is latched on
the rising edge of K clock. QDR has separate data inputs and
data outputs to completely eliminate the need to “turn-around”
the data bus required with common I/O devices. Accesses to
the CY7C1302CV25 Read and Write ports are completely
independent of one another. All accesses are initiated
synchronously on the rising edge of the positive input clock
(K). In order to maximize data throughput, both Read and
Write ports are equipped with DDR interfaces. Therefore, data
can be transferred into the device on every rising edge of both
input clocks (K and K) and out of the device on every rising
edge of the output clock (C and C, or K and K in a single clock
domain) thereby maximizing performance while simplifying
system design. Each address location is associated with two
18-bit words that burst sequentially into or out of the device.
Depth expansion is accomplished with a Port Select input for
each port. Each Port Select allows each port to operate
independently.
All synchronous inputs pass through input registers controlled
by the K or K input clocks. All data outputs pass through output
registers controlled by the C or C (or K or K in a single clock
domain) input clocks. Writes are conducted with on-chip
synchronous self-timed write circuitry.
• JTAG Interface
Configurations
CY7C1302CV25 – 512K x 18
Logic Block Diagram (CY7C1302CV25)
Write
Data Reg
Address
Register
Write Add. Decode
A(17:0)
18
18
K
K
CLK
Gen.
Write
Data Reg
Read Add. Decode
D[17:0]
256Kx18 256Kx18
Memory Memory
Array
Array
Address
Register
Control
Logic
Read Data Reg.
36
Vref
WPS
BWS0
18
Reg.
Control
Logic
18
Cypress Semiconductor Corporation
Document #: 38-05491 Rev. *A
RPS
C
C
Reg. 18
Reg.
BWS1
18
•
3901 North First Street
•
A(17:0)
18
San Jose, CA 95134
18
Q[17:0]
•
408-943-2600
Revised June 1, 2004
CY7C1302CV25
PREMILINARY
Selection Guide
CY7C1302CV25
-167
CY7C1302CV25
-133
CY7C1302CV25
-100
Unit
Maximum Operating Frequency
167
133
100
MHz
Maximum Operating Current
750
650
550
mA
Pin Configuration–CY7C1302CV25 (Top View)
1
2
3
4
5
6
7
8
WPS
BWS1
K
NC
RPS
D9
A
NC
K
BWS0
A
NC
NC
Q8
D10
VSS
A
A
A
VSS
NC
Q7
D8
VSS
VSS
NC
NC
D7
VSS
VDDQ
NC
D6
Q6
A
NC
Gnd/144M NC/36M
B
NC
Q9
C
NC
NC
D
NC
D11
Q10
VSS
VSS
VSS
E
NC
NC
Q11
VDDQ
VSS
VSS
9
10
11
NC/18M Gnd/72M
NC
F
NC
Q12
D12
VDDQ
VDD
VSS
VDD
VDDQ
NC
NC
Q5
G
NC
D13
Q13
VDDQ
VDD
VSS
VDD
VDDQ
NC
NC
D5
H
NC
VREF
VDDQ
VDDQ
VDD
VSS
VDD
VDDQ
VDDQ
VREF
ZQ
J
NC
NC
D14
VDDQ
VDD
VSS
VDD
VDDQ
NC
Q4
D4
K
NC
NC
Q14
VDDQ
VDD
VSS
VDD
VDDQ
NC
D3
Q3
L
NC
Q15
D15
VDDQ
VSS
VSS
VSS
VDDQ
NC
NC
Q2
M
NC
NC
D16
VSS
VSS
VSS
VSS
VSS
NC
Q1
D2
N
NC
D17
Q16
VSS
A
A
A
VSS
NC
NC
D1
P
NC
NC
Q17
A
A
C
A
A
NC
D0
Q0
R
TDO
TCK
A
A
A
C
A
A
A
TMS
TDI
Pin Definitions
Name
I/O
Description
D[17:0]
InputSynchronous
Data input signals, sampled on the rising edge of K and K clocks during valid Write
operations.
WPS
InputSynchronous
Write Port Select, active LOW. Sampled on the rising edge of the K clock. When asserted
active, a Write operation is initiated. Deasserting will deselect the Write port. Deselecting the
Write port will cause D[17:0] to be ignored.
BWS0, BWS1
InputSynchronous
Byte Write Select 0, 1, active LOW. Sampled on the rising edge of the K and K clocks during
Write operations. Used to select which byte is written into the device during the current portion
of the Write operations. Bytes not written remain unaltered.
BWS0 controls D[8:0] and BWS1 controls D[17:9].
All the Byte Write Selects are sampled on the same edge as the data. Deselecting a Byte Write
Select will cause the corresponding byte of data to be ignored and not written into the device.
A
InputSynchronous
Address Inputs. Sampled on the rising edge of the K (read address) and K (write address)
clocks for active Read and Write operations. These address inputs are multiplexed for both Read
and Write operations. Internally, the device is organized as 512K x 18 (2 arrays each of 256K x
18). These inputs are ignored when the appropriate port is deselected.
Q[17:0]
OutputsSynchronous
Data Output signals. These pins drive out the requested data during a Read operation. Valid
data is driven out on the rising edge of both the C and C clocks during Read operations or K and
K when in single clock mode. When the Read port is deselected, Q[17:0] are automatically
three-stated.
RPS
InputSynchronous
Read Port Select, active LOW. Sampled on the rising edge of positive input clock (K). When
active, a Read operation is initiated. Deasserting will cause the Read port to be deselected. When
deselected, the pending access is allowed to complete and the output drivers are automatically
three-stated following the next rising edge of the C clock. Each read access consists of a burst
of two sequential transfers.
InputClock
Positive Output Clock Input. 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 for further details.
C
Document #: 38-05491 Rev. *A
Page 2 of 18
PREMILINARY
CY7C1302CV25
Pin Definitions (continued)
I/O
Description
C
Name
Input-Clock
Negative Output Clock Input. 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 cack to the controller. See application example for further details.
K
Input-Clock
Positive Input Clock Input. The rising edge of K is used to capture synchronous inputs to the
device and to drive out data through Q[17:0] 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[17:0] when in single clock mode.
Input
Output Impedance Matching Input. This input is used to tune the device outputs to the system
data bus impedance. Q[17:0] output impedance is set to 0.2 x RQ, where RQ is a resistor connected between ZQ and ground. Alternately, this pin can be connected directly to VDD, which
enables the minimum impedance mode. This pin cannot be connected directly to GND or left
unconnected.
ZQ
TDO
Output
TCK
Input
TCK pin for JTAG.
TDI
Input
TDI pin for JTAG.
TMS
Input
TMS pin for JTAG.
NC/18M
N/A
Address expansion for 18M. This is not connected to the die and so can be tied to any voltage
level.
NC/36M
N/A
Address expansion for 36M. This is not connected to the die and so can be tied to any voltage
level.
GND/72M
Input
Address expansion for 72M. This must be tied LOW.
GND/144M
Input
Address expansion for 144M. This must be tied LOW.
N/A
Not connected to the die. Can be tied to any voltage level.
NC
VREF
VDD
VSS
VDDQ
InputReference
TDO for JTAG.
Reference Voltage Input. Static input used to set the reference level for HSTL inputs and
Outputs as well as AC measurement points.
Power Supply Power supply inputs to the core of the device.
Ground
Ground for the device.
Power Supply Power supply inputs for the outputs of the device.
Introduction
Functional Overview
The CY7C1302CV25 is a synchronous pipelined Burst SRAM
equipped with both a Read port and a Write port. The Read
port is dedicated to Read operations and the Write port is
dedicated to Write operations. Data flows into the SRAM
through the Write port and out through the Read port. These
devices multiplex the address inputs in order to minimize the
number of address pins required. By having separate Read
and Write ports, the QDR-I completely eliminates the need to
“turn-around” the data bus and avoids any possible data
contention, thereby simplifying system design.
Accesses for both ports are initiated on the rising edge of the
Positive Input Clock (K). All synchronous input timing is referenced from the rising edge of the input clocks (K and K) and
all output timing is referenced to the output clocks (C and C,
or K and K when in single clock mode).
All synchronous data inputs (D[17:0]) pass through input
registers controlled by the input clocks (K and K). All
synchronous data outputs (Q[17:0]) pass through output
registers controlled by the rising edge of the output clocks (C
and C, or K and K when in single clock mode).
Document #: 38-05491 Rev. *A
All synchronous control (RPS, WPS, BWS[1:0]) inputs pass
through input registers controlled by the rising edge of input
clocks (K and K).
Read Operations
The CY7C1302CV25 is organized internally as 2 arrays of
256K x 18. Accesses are completed in a burst of two
sequential 18-bit data words. Read operations are initiated by
asserting RPS active at the rising edge of the positive input
clock (K). The address is latched on the rising edge of the K
clock. Following the next K clock rise the corresponding lower
order 18-bit word of data is driven onto the Q[17:0] using C as
the output timing reference. On the subsequent rising edge of
C the higher order data word is driven onto the Q[17:0]. The
requested data will be valid 2.5 ns from the rising edge of the
output clock (C and C, or K and K when in single clock mode,
167-MHz device).
Synchronous internal circuitry will automatically three-state
the outputs following the next rising edge of the positive output
clock (C). This will allow for a seamless transition between
devices without the insertion of wait states in a depth
expanded memory.
Page 3 of 18
PREMILINARY
Write Operations
Write operations are initiated by asserting WPS active at the
rising edge of the positive input clock (K). On the same K clock
rise the data presented to D[17:0] is latched into the lower 18-bit
Write Data register provided BWS[1:0] are both asserted
active. On the subsequent rising edge of the negative input
clock (K), the address is latched and the information presented
to D[17:0] is stored into the Write Data register provided
BWS[1:0] are both asserted active. The 36 bits of data are then
written into the memory array at the specified location.
When deselected, the Write port will ignore all inputs after the
pending Write operations have been completed.
Byte Write Operations
Byte Write operations are supported by the CY7C1302CV25.
A Write operation is initiated as described in the Write
Operation section above. The bytes that are written are determined by BWS0 and BWS1 which are sampled with each set
of 18-bit data word. Asserting the appropriate Byte Write
Select input during the data portion of a write will allow the data
being presented to be latched and written into the device.
Deasserting the Byte Write Select input during the data portion
of a write will allow the data stored in the device for that byte
to remain unaltered. This feature can be used to simplify
Read/Modify/Write operations to a Byte Write operation.
Single Clock Mode
The CY7C1302CV25 can be used with a single clock mode.
In this mode the device will recognize only the pair of input
clocks (K and K) that control both the input and output
registers. This operation is identical to the operation if the
device had zero skew between the K/K and C/C clocks. All
timing parameters remain the same in this mode. To use this
mode of operation, the user must tie C and C HIGH at
CY7C1302CV25
power-up.This function is a strap option and not alterable
during device operation.
Concurrent Transactions
The Read and Write ports on the CY7C1302CV25 operate
completely independently of one another. Since each port
latches the address inputs on different clock edges, the user
can Read or Write to any location, regardless of the transaction on the other port. Also, reads and writes can be started
in the same clock cycle. If the ports access the same location
at the same time, the SRAM will deliver the most recent information associated with the specified address location. This
includes forwarding data from a Write cycle that was initiated
on the previous K clock rise.
Depth Expansion
The CY7C1302CV25 has a Port Select input for each port.
This allows for easy depth expansion. Both Port Selects are
sampled on the rising edge of the Positive Input Clock only (K).
Each port select input can deselect the specified port.
Deselecting a port will not affect the other port. All pending
transactions (Read and Write) will be completed prior to the
device being deselected.
Programmable Impedance
An external resistor, RQ, must be connected between the ZQ
pin on the SRAM and VSS to allow the SRAM to adjust its
output driver impedance. The value of RQ must be 5X the
value of the intended line impedance driven by the SRAM, The
allowable range of RQ to guarantee impedance matching with
a tolerance of ±15% is between 175Ω and 350Ω, with VDDQ
=1.5V. The output impedance is adjusted every 1024 cycles to
account for drifts in supply voltage and temperature.
Application Example[1]
Note:
1. The above application shows 4 QDR-I being used.
Document #: 38-05491 Rev. *A
Page 4 of 18
CY7C1302CV25
PREMILINARY
Truth Table[2, 3, 4, 5, 6, 7]
Operation
K
RPS
WPS
Write Cycle:
Load address on the rising edge of K clock; input write
data on K and K rising edges.
L-H
X
L
D(A+0)at
K(t) ↑
D(A+1) at
K(t) ↑
Read Cycle:
Load address on the rising edge of K clock; wait one
cycle; read data on 2 consecutive C and C rising edges.
L-H
L
X
Q(A+0) at
C(t+1)↑
Q(A+1) at
C(t+1) ↑
NOP: No Operation
L-H
H
H
D=X
Q = High-Z
D=X
Q = High-Z
Stopped
X
X
Previous
State
Previous
State
Standby: Clock Stopped
DQ
DQ
Write Cycle Descriptions[2,8]
BWS0
BWS1
K
K
Comments
L
L
L-H
–
During the Data portion of a Write sequence, both bytes (D[17:0]) are written into the device.
L
L
–
L-H
During the Data portion of a Write sequence, both bytes (D[17:0]) are written into the device.
L
H
L-H
–
During the Data portion of a Write sequence, only the lower byte (D[8:0]) is written into the
device. D[17:9] remains unaltered.
L
H
–
L-H
During the Data portion of a Write sequence, only the lower byte (D[8:0]) is written into the
device. D[17:9] remains unaltered.
H
L
L-H
–
During the Data portion of a Write sequence, only the byte (D[17:9]) is written into the device.
D[8:0] remains unaltered.
H
L
–
L-H
During the Data portion of a Write sequence, only the byte (D[17:9]) is written into the device.
D[8:0] remains unaltered.
H
H
L-H
–
No data is written into the device during this portion of a Write operation.
H
H
–
L-H
No data is written into the device during this portion of a Write operation.
Notes:
2. X = Don't Care, H = Logic HIGH, L = Logic LOW, ↑ represents rising edge.
3. Device will power-up deselected and the outputs in a three-state condition.
4. “A” represents address location latched by the devices when transaction was initiated. A+0, A+1 represent the addresses sequence in the burst.
5. “t” represents the cycle at which a Read/Write operation is started. t+1 is the first clock cycle succeeding the “t” clock cycle.
6. Data inputs are registered at K and K rising edges. Data outputs are delivered on C and C rising edges, except when in single clock mode.
7. It is recommended that K = K and C = C when clock is stopped. This is not essential, but permits most rapid restart by overcoming transmission line charging
symmetrically.
8. Assumes a Write cycle was initiated per the Write Port Cycle Description Truth Table. BWS0, BWS1 can be altered on different portions of a Write cycle, as long
as the set-up and hold requirements are achieved.
Document #: 38-05491 Rev. *A
Page 5 of 18
CY7C1302CV25
PREMILINARY
Maximum Ratings
Static Discharge Voltage........................................... >2001V
(per MIL-STD-883, Method 3015)
(Above which the useful life may be impaired.)
Storage Temperature .................................. –65°C to +150°C
Ambient Temperature with
Power Applied............................................. –55°C to +125°C
Supply Voltage on VDD Relative to GND........ –0.5V to +3.6V
DC Applied to Outputs in High-Z......... –0.5V to VDDQ + 0.5V
Latch-up Current..................................................... >200 mA
Operating Range
Range
Ambient
Temperature (TA)
VDD[10]
VDDQ[10]
0°C to +70°C
2.5 ± 0.1V
1.4V to 1.9V
Com’l
DC Input Voltage[9 .............................. –0.5V to VDDQ + 0.5V
Current into Outputs (LOW) .........................................20 mA
Electrical Characteristics Over the Operating Range[11]
DC Electrical Characteristics Over the Operating Range
Parameter
Description
Test Conditions
Min.
Typ.
Max.
Unit
VDD
Power Supply Voltage
2.4
2.5
2.6
V
VDDQ
I/O Supply Voltage
1.4
1.5
1.9
V
VOH
Output HIGH Voltage
Note 12
VDDQ/2 – 0.12
VDDQ/2 + 0.12
V
VOL
Output LOW Voltage
Note 13
VDDQ/2 – 0.12
VDDQ/2 + 0.12
V
VDDQ – 0.2
VDDQ
V
VSS
0.2
V
VREF + 0.1
VDDQ + 0.3
V
–0.3
VREF –0.1
V
–0.3
VDDQ+0.3
V
–5
5
µA
VOH(LOW)
Output HIGH Voltage
IOH = –0.1 mA, Nominal Impedance
VOL(LOW)
Output LOW Voltage
IOL = 0.1 mA, Nominal Impedance
VIH
Input HIGH Voltage[9]
VIL
Input LOW Voltage[9, 14]
VIN
Clock Input Voltage
IX
Input Load Current
GND ≤ VI ≤ VDDQ
IOZ
Output Leakage Current
GND ≤ VI ≤ VDDQ, Output Disabled
VREF
Input Reference Voltage[15]
Typical value = 0.75V
IDD
VDD Operating Supply
VDD = Max.,
IOUT = 0 mA,
f = fMAX = 1/tCYC
ISB1
Automatic
Power-Down
Current
5
µA
0.95
V
167 MHz
750
mA
133 MHz
650
mA
100 MHz
550
mA
167 MHz
Max. VDD, Both Ports
Deselected, VIN ≥ VIH or 133 MHz
VIN ≤ VIL, f =
100 MHz
fMAX = 1/tCYC,
Inputs Static
470
mA
450
mA
430
mA
Max.
Unit
–5
0.68
0.75
AC Input Requirements Over the Operating Range
Parameter
Description
Test Conditions
Min.
Typ.
VIH
Input High (Logic 1) Voltage
VREF + 0.2
–
V
VIL
Input Low (Logic 0) Voltage
–
VREF – 0.2
V
Notes:
9. Overshoot: VIH(AC) < VDDQ +0.85V (Pulse width less than tCYC/2), Undershoot: VIL(AC) > –1.5V (Pulse width less than tCYC/2).
10. Power-up: Assumes a linear ramp from 0V to VDD(min.) within 200 ms. During this time VIH < VDD and VDDQ < VDD.
11. All voltage referenced to Ground.
12. Output are impedance controlled. IOH = –(VDDQ/2)/(RQ/5) for values of 175Ω <= RQ <= 350Ω.
13. Output are impedance controlled. IOL = (VDDQ/2)/(RQ/5) for values of 175Ω <= RQ <= 350Ω.
14. This spec is for all inputs except C and C Clock. For C and C Clock, VIL(Max.) = VREF – 0.2V.
15. VREF (Min.) = 0.68V or 0.46VDDQ, whichever is larger, VREF (Max.) = 0.95V or 0.54VDDQ, whichever is smaller.
Document #: 38-05491 Rev. *A
Page 6 of 18
CY7C1302CV25
PREMILINARY
Thermal Resistance[16]
Parameter
Description
Test Conditions
ΘJA
Thermal Resistance (Junction to Ambient)
ΘJC
Thermal Resistance (Junction to Case)
165 FBGA Package Unit
Test conditions follow standard test
methods and procedures for measuring
thermal impedance, per EIA/JESD51.
16.7
°C/W
2.5
°C/W
Capacitance[16]
Parameter
Description
CIN
Input Capacitance
CCLK
Clock Input Capacitance
CO
Output Capacitance
Test Conditions
Max.
TA = 25°C, f = 1 MHz,
VDD = 2.5V.
VDDQ = 1.5V
Unit
5
pF
6
pF
7
pF
AC Test Loads and Waveforms
VDDQ/2
VDDQ/2
VREF
VREF
OUTPUT
Z0 = 50Ω
Device
Under
Test
ZQ
RQ =
250Ω
(a)
RL = 50Ω
VREF = 0.75V
VDDQ/2
R = 50Ω
ALL INPUT PULSES
1.25V
0.75V
OUTPUT
Device
Under
Test ZQ
INCLUDING
JIG AND
SCOPE
5 pF
[17]
0.25V
RQ =
250Ω
(b)
Switching Characteristics Over the Operating Range [17]
Cypress
Parameter
-167
Consortium
Parameter
tPower[18]
-133
Max. Min.
Max.
-100
Description
Min.
Min. Max. Unit
VCC (typical) to the First Access Read or Write
10
10
10
µs
Cycle Time
tCYC
tKHKH
K Clock and C Clock Cycle Time
6.0
7.5
10.0
ns
tKH
tKHKL
Input Clock (K/K and C/C) HIGH
2.4
3.2
3.5
ns
tKL
tKLKH
Input Clock (K/K and C/C) LOW
2.4
tKHKH
tKHKH
K/K Clock Rise to K/K Clock Rise and C/C to C/C
Rise (rising edge to rising edge)
2.7
3.3
3.4
4.1
4.4
5.4
ns
tKHCH
tKHCH
K/K Clock Rise to C/C Clock Rise (rising edge to
rising edge)
0.0
2.0
0.0
2.5
0.0
3.0
ns
3.2
3.5
ns
Set-up Times
tSA
tSA
Address Set-up to Clock (K and K) Rise
0.7
0.8
1.0
ns
tSC
tSC
Control Set-up to Clock (K and K) Rise (RPS,
WPS, BWS0, BWS1)
0.7
0.8
1.0
ns
tSD
tSD
D[17:0] Set-up to Clock (K and K) Rise
0.7
0.8
1.0
ns
Notes:
16. Tested initially and after any design or process change that may affect these parameters.
17. Unless otherwise noted, test conditions assume signal transition time of 2V/ns, timing reference levels of 0.75V,Vref = 0.75V, RQ = 250W, VDDQ = 1.5V, input
pulse levels of 0.25V to 1.25V, and output loading of the specified IOL/IOH and load capacitance shown in (a) of AC test loads.
18. This part has a voltage regulator that steps down the voltage internally; tPower is the time power needs to be supplied above VDD minimum initially before a read
or write operation can be initiated.
Document #: 38-05491 Rev. *A
Page 7 of 18
CY7C1302CV25
PREMILINARY
Switching Characteristics Over the Operating Range (continued)[17]
Cypress
Parameter
-167
Consortium
Parameter
Description
Min.
-133
Max. Min.
Max.
-100
Min. Max. Unit
Hold Times
tHA
tHA
Address Hold after Clock (K and K) Rise
0.7
0.8
1.0
ns
tHC
tHC
Control Signals Hold after Clock (K and K) Rise
(RPS, WPS, BWS0, BWS1)
0.7
0.8
1.0
ns
tHD
tHD
D[17:0] Hold after Clock (K and K) Rise
0.7
0.8
1.0
ns
Output Times
tCO
tCHQV
C/C Clock Rise (or K/K in single clock mode) to
Data Valid
tDOH
tCHQX
Data Output Hold after Output C/C Clock Rise
(Active to Active)
tCHZ
tCHZ
Clock (C and C) Rise to High-Z (Active to High-Z)[19, 20]
tCLZ
tCLZ
Clock (C and C) Rise to Low-Z[19, 20]
2.5
1.2
3.0
1.2
2.5
1.2
3.0
1.2
ns
3.0
1.2
ns
3.0
1.2
ns
ns
Notes:
19. tCHZ, tCLZ, are specified with a load capacitance of 5 pF as in (b) of AC Test Loads. Transition is measured ± 100 mV from steady-state voltage.
20. At any given voltage and temperature tCHZ is less than tCLZ and, tCHZ less than tCO.
Document #: 38-05491 Rev. *A
Page 8 of 18
CY7C1302CV25
PREMILINARY
Switching Waveforms[21, 22, 23]
READ
WRITE
READ
WRITE
READ
WRITE
NOP
WRITE
NOP
1
2
3
4
5
6
7
8
9
10
K
tKH
tKL
tKHKH
tCYC
K
RPS
tSC
tHC
WPS
A A0
D
D10
A1
A2
tSA tHA
tSA tHA
D11
D30
A3
A4
A5
D31
D50
D51
Q
Q00
tKHCH
tKHCH
tCO
Q01
tDOH
tCLZ
D60
tSD
tHD
tSD
A6
Q20
D61
tHD
Q21
Q40
Q41
tCHZ
tDOH
tCO
C
tKH
tKL
tKHKH
tCYC
C
DON’T CARE
UNDEFINED
Notes:
21. Q00 refers to output from address A0. Q01 refers to output from the next internal burst address following A0 i.e., A0+1.
22. Outputs are disabled (High-Z) one clock cycle after a NOP.
23. In this example, if address A2=A1 then data Q20=D10 and Q21=D11. Write data is forwarded immediately as read results.This note applies to the whole diagram.
Document #: 38-05491 Rev. *A
Page 9 of 18
PREMILINARY
IEEE 1149.1 Serial Boundary Scan (JTAG)
These SRAMs incorporate a serial boundary scan test access
port (TAP) in the FBGA package. This part is fully compliant
with IEEE Standard #1149.1-1900. The TAP operates using
JEDEC standard 2.5V I/O logic levels.
Disabling the JTAG Feature
It is possible to operate the SRAM without using the JTAG
feature. To disable the TAP controller, TCK must be tied LOW
(VSS) to prevent clocking of the device. TDI and TMS are internally pulled up and may be unconnected. They may alternately
be connected to VDD through a pull-up resistor. TDO should
be left unconnected. Upon power-up, the device will come up
in a reset state which will not interfere with the operation of the
device.
Test Access Port—Test Clock
The test clock is used only with the TAP controller. All inputs
are captured on the rising edge of TCK. All outputs are driven
from the falling edge of TCK.
Test Mode Select
The TMS input is used to give commands to the TAP controller
and is sampled on the rising edge of TCK. It is allowable to
leave this pin unconnected if the TAP is not used. The pin is
pulled up internally, resulting in a logic HIGH level.
Test Data-In (TDI)
The TDI pin is used to serially input information into the
registers and can be connected to the input of any of the
registers. The register between TDI and TDO is chosen by the
instruction that is loaded into the TAP instruction register. For
information on loading the instruction register, see the TAP
Controller State Diagram. TDI is internally pulled up and can
be unconnected if the TAP is unused in an application. TDI is
connected to the most significant bit (MSB) on any register.
Test Data-Out (TDO)
The TDO output pin is used to serially clock data-out from the
registers. The output is active depending upon the current
state of the TAP state machine (see Instruction codes). The
output changes on the falling edge of TCK. TDO is connected
to the least significant bit (LSB) of any register.
Performing a TAP Reset
A Reset is performed by forcing TMS HIGH (VDD) for five rising
edges of TCK. This RESET does not affect the operation of
the SRAM and may be performed while the SRAM is
operating. At power-up, the TAP is reset internally to ensure
that TDO comes up in a high-Z state.
TAP Registers
Registers are connected between the TDI and TDO pins and
allow data to be scanned into and out of the SRAM test
circuitry. Only one register can be selected at a time through
the instruction registers. Data is serially loaded into the TDI pin
on the rising edge of TCK. Data is output on the TDO pin on
the falling edge of TCK.
Instruction Register
Three-bit instructions can be serially loaded into the instruction
register. This register is loaded when it is placed between the
Document #: 38-05491 Rev. *A
CY7C1302CV25
TDI and TDO pins as shown in TAP Controller Block Diagram.
Upon power-up, the instruction register is loaded with the
IDCODE instruction. It is also loaded with the IDCODE
instruction if the controller is placed in a reset state as
described in the previous section.
When the TAP controller is in the Capture IR state, the two
least significant bits are loaded with a binary “01” pattern to
allow for fault isolation of the board level serial test path.
Bypass Register
To save time when serially shifting data through registers, it is
sometimes advantageous to skip certain chips. The bypass
register is a single-bit register that can be placed between TDI
and TDO pins. This allows data to be shifted through the
SRAM with minimal delay. The bypass register is set LOW
(VSS) when the BYPASS instruction is executed.
Boundary Scan Register
The boundary scan register is connected to all of the input and
output pins on the SRAM. Several no connect (NC) pins are
also included in the scan register to reserve pins for higher
density devices.
The boundary scan register is loaded with the contents of the
RAM Input and Output ring when the TAP controller is in the
Capture-DR state and is then placed between the TDI and
TDO pins when the controller is moved to the Shift-DR state.
The EXTEST, SAMPLE/PRELOAD and SAMPLE Z instructions can be used to capture the contents of the Input and
Output ring.
The Boundary Scan Order tables show the order in which the
bits are connected. Each bit corresponds to one of the bumps
on the SRAM package. The MSB of the register is connected
to TDI, and the LSB is connected to TDO.
Identification (ID) Register
The ID register is loaded with a vendor-specific, 32-bit code
during the Capture-DR state when the IDCODE command is
loaded in the instruction register. The IDCODE is hardwired
into the SRAM and can be shifted out when the TAP controller
is in the Shift-DR state. The ID register has a vendor code and
other information described in the Identification Register
Definitions table.
TAP Instruction Set
Eight different instructions are possible with the three-bit
instruction register. All combinations are listed in the
Instruction Code table. Three of these instructions are listed
as RESERVED and should not be used. The other five instructions are described in detail below.
Instructions are loaded into the TAP controller during the
Shift-IR state when the instruction register is placed between
TDI and TDO. During this state, instructions are shifted
through the instruction register through the TDI and TDO pins.
To execute the instruction once it is shifted in, the TAP
controller needs to be moved into the Update-IR state.
IDCODE
The IDCODE instruction causes a vendor-specific, 32-bit code
to be loaded into the instruction register. It also places the
instruction register between the TDI and TDO pins and allows
the IDCODE to be shifted out of the device when the TAP
controller enters the Shift-DR state. The IDCODE instruction
Page 10 of 18
PREMILINARY
is loaded into the instruction register upon power-up or
whenever the TAP controller is given a test logic reset state.
SAMPLE Z
The SAMPLE Z instruction causes the boundary scan register
to be connected between the TDI and TDO pins when the TAP
controller is in a Shift-DR state. The SAMPLE Z command puts
the output bus into a High-Z state until the next command is
given during the “Update IR” state.
SAMPLE/PRELOAD
SAMPLE/PRELOAD is a 1149.1 mandatory instruction. When
the SAMPLE/PRELOAD instructions are loaded into the
instruction register and the TAP controller is in the Capture-DR
state, a snapshot of data on the inputs and output pins is
captured in the boundary scan register.
The user must be aware that the TAP controller clock can only
operate at a frequency up to 10 MHz, while the SRAM clock
operates more than an order of magnitude faster. Because
there is a large difference in the clock frequencies, it is
possible that during the Capture-DR state, an input or output
will undergo a transition. The TAP may then try to capture a
signal while in transition (metastable state). This will not harm
the device, but there is no guarantee as to the value that will
be captured. Repeatable results may not be possible.
To guarantee that the boundary scan register will capture the
correct value of a signal, the SRAM signal must be stabilized
long enough to meet the TAP controller's capture set-up plus
hold times (tCS and tCH). The SRAM clock input might not be
captured correctly if there is no way in a design to stop (or
slow) the clock during a SAMPLE/PRELOAD instruction. If this
is an issue, it is still possible to capture all other signals and
simply ignore the value of the CK and CK captured in the
boundary scan register.
Once the data is captured, it is possible to shift out the data by
putting the TAP into the Shift-DR state. This places the
boundary scan register between the TDI and TDO pins.
PRELOAD allows an initial data pattern to be placed at the
latched parallel outputs of the boundary scan register cells
prior to the selection of another boundary scan test operation.
CY7C1302CV25
The shifting of data for the SAMPLE and PRELOAD phases
can occur concurrently when required—that is, while data
captured is shifted out, the preloaded data can be shifted in.
BYPASS
When the BYPASS instruction is loaded in the instruction
register and the TAP is placed in a Shift-DR state, the bypass
register is placed between the TDI and TDO pins. The
advantage of the BYPASS instruction is that it shortens the
boundary scan path when multiple devices are connected
together on a board.
EXTEST
The EXTEST instruction enables the preloaded data to be
driven out through the system output pins. This instruction also
selects the boundary scan register to be connected for serial
access between the TDI and TDO in the shift-DR controller
state.
EXTEST Output Bus Three-state
IEEE Standard 1149.1 mandates that the TAP controller be
able to put the output bus into a three-state mode.
The boundary scan register has a special bit located at bit #47.
When this scan cell, called the “extest output bus three-state”,
is latched into the preload register during the “Update-DR”
state in the TAP controller, it will directly control the state of the
output (Q-bus) pins, when the EXTEST is entered as the
current instruction. When HIGH, it will enable the output
buffers to drive the output bus. When LOW, this bit will place
the output bus into a High-Z condition.
This bit can be set by entering the SAMPLE/PRELOAD or
EXTEST command, and then shifting the desired bit into that
cell, during the “Shift-DR” state. During “Update-DR”, the value
loaded into that shift-register cell will latch into the preload
register. When the EXTEST instruction is entered, this bit will
directly control the output Q-bus pins. Note that this bit is
pre-set HIGH to enable the output when the device is
powered-up, and also when the TAP controller is in the
“Test-Logic-Reset” state.
Reserved
These instructions are not implemented but are reserved for
future use. Do not use these instructions.
Document #: 38-05491 Rev. *A
Page 11 of 18
CY7C1302CV25
PREMILINARY
TAP Controller State Diagram[24]
1
TEST-LOGIC
RESET
0
0
TEST-LOGIC/
IDLE
1
1
SELECT
DR-SCAN
0
1
0
1
CAPTURE-DR
CAPTURE-DR
0
0
0
SHIFT-DR
1
1
EXIT1-DR
1
EXIT1-IR
0
0
PAUSE-DR
0
0
PAUSE-IR
1
1
0
EXIT2-DR
EXIT2-IR
1
1
UPDATE-DR
1
0
SHIFT-IR
1
0
1
SELECT
IR-SCAN
0
UPDATE-IR
1
0
Note:
24. The 0/1 next to each state represents the value at TMS at the rising edge of TCK.
Document #: 38-05491 Rev. *A
Page 12 of 18
CY7C1302CV25
PREMILINARY
TAP Controller Block Diagram
0
Bypass Register
Selection
Circuitry
TDI
2
1
0
1
0
Selection
Circuitry
Instruction Register
31 30 29
.
.
2
TDO
Identification Register
106 .
.
.
.
2
1
0
Boundary Scan Register
TCK
TMS
TAP Controller
TAP Electrical Characteristics Over the Operating Range [11, 9, 25]
Parameter
Description
Test Conditions
Min.
IOH = −2.0 mA
1.7
Output HIGH Voltage
IOH = −100 µA
2.1
Output LOW Voltage
IOL = 2.0 mA
VOL2
Output LOW Voltage
IOL = 100 µA
VIH
Input HIGH Voltage
VIL
Input LOW Voltage
IX
Input and Output Load Current
VOH1
Output HIGH Voltage
VOH2
VOL1
GND ≤ VI ≤ VDDQ
TAP AC Switching Characteristics Over the Operating Range
Parameter
Description
Max.
Unit
V
V
0.7
V
0.2
V
1.7
VDD + 0.3
V
–0.3
0.7
V
–5
5
µA
[26, 27]
Min.
Max.
Unit
10
MHz
tTCYC
TCK Clock Cycle Time
tTF
TCK Clock Frequency
tTH
TCK Clock HIGH
40
ns
tTL
TCK Clock LOW
40
ns
tTMSS
TMS Set-up to TCK Clock Rise
10
ns
tTDIS
TDI Set-up to TCK Clock Rise
10
ns
tCS
Capture Set-up to TCK Rise
10
ns
tTMSH
TMS Hold after TCK Clock Rise
10
ns
tTDIH
TDI Hold after Clock Rise
10
ns
tCH
Capture Hold after Clock Rise
10
ns
100
ns
Set-up Times
Hold Times
Notes:
25. These characteristics pertain to the TAP inputs (TMS, TCK, TDI and TDO). Parallel load levels are specified in the Electrical Characteristics table.
26. TCS and TCH refer to the set-up and hold time requirements of latching data from the boundary scan register.
27. Test conditions are specified using the load in TAP AC test conditions. Tr/Tf = 1 ns.
Document #: 38-05491 Rev. *A
Page 13 of 18
CY7C1302CV25
PREMILINARY
TAP AC Switching Characteristics Over the Operating Range (continued) [26, 27]
Parameter
Description
Min.
Max.
Unit
Output Times
tTDOV
TCK Clock LOW to TDO Valid
tTDOX
TCK Clock LOW to TDO Invalid
20
ns
0
ns
TAP Timing and Test Conditions[27]
1.25V
50Ω
ALL INPUT PULSES
TDO
2.5V
Z0 = 50Ω
(a)
1.25V
CL = 20 pF
0V
GND
tTH
tTL
Test Clock
TCK
tTCYC
tTMSS
tTMSH
Test Mode Select
TMS
tTDIS
tTDIH
Test Data-In
TDI
Test Data-Out
TDO
tTDOX
tTDOV
Identification Register Definitions
Value
Instruction Field
Revision Number (31:29)
CY7C1302CV25
001
Cypress Device ID (28:12)
01011010010010110
Cypress JEDEC ID (11:1)
00000110100
ID Register Presence (0)
1
Document #: 38-05491 Rev. *A
Description
Version number.
Defines the type of SRAM.
Allows unique identification of SRAM vendor.
Indicate the presence of an ID register.
Page 14 of 18
CY7C1302CV25
PREMILINARY
Scan Register Sizes
Register Name
Bit Size
Instruction
3
Bypass
1
ID
32
Boundary Scan
107
Instruction Codes
Instruction
Code
Description
EXTEST
000
Captures the Input/Output ring contents.
IDCODE
001
Loads the ID register with the vendor ID code and places the register between TDI and TDO.
This operation does not affect SRAM operation.
SAMPLE Z
010
Captures the Input/Output contents. Places the boundary scan register between TDI and
TDO. Forces all SRAM output drivers to a High-Z state.
RESERVED
011
Do Not Use: This instruction is reserved for future use.
SAMPLE/PRELOAD
100
Captures the Input/Output ring contents. Places the boundary scan register between TDI
and TDO. Does not affect the SRAM operation.
RESERVED
101
Do Not Use: This instruction is reserved for future use.
RESERVED
110
Do Not Use: This instruction is reserved for future use.
BYPASS
111
Places the bypass register between TDI and TDO. This operation does not affect SRAM
operation.
Boundary Scan Order (continued)
Boundary Scan Order
Bump ID
Bit #
Bump ID
0
6R
23
9J
1
6P
24
9K
2
6N
25
10J
3
7P
26
11J
4
7N
27
11H
5
7R
28
10G
6
8R
29
9G
7
8P
30
11F
8
9R
31
11G
9
11P
32
9F
10
10P
33
10F
11
10N
34
11E
12
9P
35
10E
13
10M
36
10D
14
11N
37
9E
15
9M
38
10C
16
9N
39
11D
17
11L
40
9C
18
11M
41
9D
19
9L
42
11B
20
10L
43
11C
21
11K
44
9B
10K
45
10B
46
11A
Bit #
22
Document #: 38-05491 Rev. *A
Page 15 of 18
CY7C1302CV25
PREMILINARY
Boundary Scan Order (continued)
Boundary Scan Order (continued)
Bit #
Bump ID
Bit #
Bump ID
47
Internal
91
1M
48
9A
92
1L
49
8B
93
3N
50
7C
94
3M
51
6C
95
1N
52
8A
96
2M
53
7A
97
3P
54
7B
98
2N
55
6B
99
2P
56
6A
100
1P
57
5B
101
3R
58
5A
102
4R
59
4A
103
4P
60
5C
104
5P
61
4B
105
5N
62
3A
106
5R
63
1H
64
1A
65
2B
66
3B
67
1C
68
1B
69
3D
70
3C
71
1D
72
2C
73
3E
74
2D
75
2E
76
1E
77
2F
78
3F
79
1G
80
1F
81
3G
82
2G
83
1J
84
2J
85
3K
86
3J
87
2K
88
1K
89
2L
90
3L
Document #: 38-05491 Rev. *A
Page 16 of 18
PREMILINARY
CY7C1302CV25
Ordering Information
Speed
(MHz)
167
Ordering Code
CY7C1302CV25-167BZC
Package
Name
Operating
Range
Package Type
BB165D
13 x 15 x 1.4 mm FBGA
133
CY7C1302CV25-133BZC
BB165D
13 x 15 x 1.4 mm FBGA
100
CY7C1302CV25-100BZC
BB165D
13 x 15 x 1.4 mm FBGA
Commercial
Package Diagram
165 FBGA 13 x 15 x 1.40 mm BB165D
51-85180-**
51-85180-**
Quad Data Rate SRAM and QDR SRAM comprise a new family of products developed by Cypress, IDT, NEC and Samsung.
All product and company names mentioned in this document are trademarks of their respective holders.
Document #: 38-05491 Rev. *A
Page 17 of 18
© Cypress Semiconductor Corporation, 2004. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use
of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize
its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress
Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges.
CY7C1302CV25
PREMILINARY
Document History Page
Document Title:CY7C1302CV25 9-Mb Burst of 2 Pipelined SRAM with QDR™ Architecture
Document Number: 38-05491
REV.
ECN NO.
Issue Date
Orig. of
Change
Description of Change
**
208401
see ECN
DIM
New Data Sheet
*A
230396
see ECN
VBL
Upload datasheet to the internet
Document #: 38-05491 Rev. *A
Page 18 of 18