Cypress CY7C1338G - Manual
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Table of Contents:
- Page 2 – Selection Guide; Unit; Pin Configurations
- Page 5 – DD; ZZ Mode Electrical Characteristics
- Page 6 – Truth Table
- Page 7 – Partial Truth Table for Read/Write
- Page 8 – Electrical Characteristics
- Page 9 – Capacitance; Thermal Resistance
- Page 10 – Switching Characteristics
- Page 11 – Timing Diagrams; Read Cycle Timing
- Page 12 – Write Cycle Timing
- Page 14 – ZZ Mode Timing; CLK
- Page 15 – Ordering Information; Commercial; Package Diagrams
- Page 17 – Document History Page; Issue Date
4-Mbit (128K x 32) Flow-Through Sync SRAM
CY7C1338G
Cypress Semiconductor Corporation
•
198 Champion Court
•
San Jose
,
CA 95134-1709
•
408-943-2600
Document #: 38-05521 Rev. *D
Revised July 5, 2006
Features
• 128K x 32 common I/O
• 3.3V core power supply (V
DD
)
• 2.5V or 3.3V I/O supply (V
DDQ
)
• Fast clock-to-output times
— 6.5 ns (133-MHz version)
• Provide high-performance 2-1-1-1 access rate
•
User-selectable burst counter supporting Intel
®
Pentium
®
interleaved or linear burst sequences
• Separate processor and controller address strobes
• Synchronous self-timed write
• Asynchronous output enable
• Offered in lead-free 100-Pin TQFP package, lead-free
and non-lead-free 119-Ball BGA package
• “ZZ” Sleep Mode option
Functional Description
[1]
The CY7C1338G is a 128K x 32 synchronous cache RAM
designed to interface with high-speed microprocessors with
minimum glue logic. Maximum access delay from clock rise is
6.5 ns (133-MHz version). A 2-bit on-chip counter captures the
first address in a burst and increments the address automati-
cally for the rest of the burst access. All synchronous inputs
are gated by registers controlled by a positive-edge-triggered
Clock Input (CLK). The synchronous inputs include all
addresses, all data inputs, address-pipelining Chip Enable
(CE
1
), depth-expansion Chip Enables (CE
2
and CE
3
), Burst
Control inputs (ADSC, ADSP, and ADV), Write Enables
(BW
[A:D]
, and BWE), and Global Write (GW). Asynchronous
inputs include the Output Enable (OE) and the ZZ pin.
The CY7C1338G allows either interleaved or linear burst
sequences, selected by the MODE input pin. A HIGH selects
an interleaved burst sequence, while a LOW selects a linear
burst sequence. Burst accesses can be initiated with the
Processor Address Strobe (ADSP) or the cache Controller
Address Strobe (ADSC) inputs. Address advancement is
controlled by the Address Advancement (ADV) input.
Addresses and chip enables are registered at rising edge of
clock when either Address Strobe Processor (ADSP) or
Address Strobe Controller (ADSC) are active. Subsequent
burst addresses can be internally generated as controlled by
the Advance pin (ADV).
The CY7C1338G operates from a +3.3V core power supply
while all outputs may operate with either a +2.5 or +3.3V
supply. All inputs and outputs are JEDEC-standard
JESD8-5-compatible.
Note:
1. For best-practices recommendations, please refer to the Cypress application note
System Design Guidelines
on www.cypress.com.
ADDRESS
REGISTER
BURST
COUNTER
AND LOGIC
CLR
Q1
Q0
ENABLE
REGISTER
SENSE
AMPS
OUTPUT
BUFFERS
INPUT
REGISTERS
MEMORY
ARRAY
MODE
A
[1:0]
ZZ
A0, A1, A
ADV
CLK
ADSP
ADSC
BW
D
BW
C
BW
B
BW
A
BWE
CE1
CE2
CE3
OE
GW
SLEEP
CONTROL
DQ
A
BYTE
WRITE REGISTER
DQ
B
BYTE
WRITE REGISTER
DQ
C
BYTE
WRITE REGISTER
WRITE REGISTER
DQ
D
BYTE
DQ
D
BYTE
WRITE REGISTER
DQ
C
BYTE
WRITE REGISTER
DQ
B
BYTE
WRITE REGISTER
DQ
A
BYTE
WRITE REGISTER
DQs
Logic Block Diagram
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Summary
CY7C1338G Document #: 38-05521 Rev. *D Page 2 of 17 Selection Guide 133 MHz 100 MHz Unit Maximum Access Time 6.5 8.0 ns Maximum Operating Current 225 205 mA Maximum Standby Current 40 40 mA Pin Configurations 100-Pin TQFP Pinout A A A A A 1 A 0 NC/72M NC/36M V SS V DD NC /9M A A A A A A NC DQ B V DD...
CY7C1338G Document #: 38-05521 Rev. *D Page 5 of 17 Single Write Accesses Initiated by ADSP This access is initiated when the following conditions aresatisfied at clock rise: (1) CE 1 , CE 2 , CE 3 are all asserted active, and (2) ADSP is asserted LOW. The addressespresented are loaded into the addr...
CY7C1338G Document #: 38-05521 Rev. *D Page 6 of 17 Truth Table [2, 3, 4, 5, 6] Cycle Description Address Used CE 1 CE 2 CE 3 ZZ ADSP ADSC ADV WRITE OE CLK DQ Deselected Cycle, Power-down None H X X L X L X X X L-H Tri-State Deselected Cycle, Power-down None L L X L L X X X X L-H Tri-State Deselecte...
