Cypress STK14CA8 Manual De Usuario

Descargar
Página de 16
STK14CA8
128Kx8 AutoStore
 nvSRAM
Cypress Semiconductor Corporation
198 Champion Court
San Jose
,
CA 95134-1709
408-943-2600
Document Number: 001-51592 Rev. **
 Revised March 04, 2009
Features
25, 35, 45 ns Read Access and Read/Write Cycle Time
Unlimited Read/Write Endurance
Automatic Nonvolatile STORE on Power Loss
Nonvolatile STORE Under Hardware or Software Control
Automatic RECALL to SRAM on Power Up
Unlimited RECALL Cycles
200K STORE Cycles
20-Year Nonvolatile Data Retention
Single 3.0V + 20%, -10% Operation
Commercial and Industrial Temperatures
Small Footprint SOIC and SSOP Packages (RoHS Compliant)
Description
The Cypress STK14CA8 is a 1 Mb fast static RAM with a nonvol-
atile QuantumTrap™ storage element included with each
memory cell. This SRAM provides fast access and cycle times,
ease of use, and unlimited read and write endurance of a normal
SRAM.
Data transfers automatically to the nonvolatile storage cells
when power loss is detected (the STORE operation). On power
up, data is automatically restored to the SRAM (the RECALL
operation). Both STORE and RECALL operations are also
available under software control. 
The Cypress nvSRAM is the first monolithic nonvolatile memory
to offer unlimited writes and reads. It is the highest performing
and most reliable nonvolatile memory available.
 
 
 
 
 
 
 
 
 
 
R
O
W
 DE
C
O
DE
R
 
IN
PUT BU
F
F
ER
S
 
COLUMN DEC
 
G
  
E
  
W   
COLUMN I/O
POWER
CONTROL  
 
 
HSB
 
 
STORE/
RECALL
CONTROL
 
 
 
SOFTWARE
DETECT  
A
15
 – A
0
A
5
A
6
A
7
A
8
A
9
A
12
A
13
A
14
A
15
A
16
Quantum Trap
1024 X 1024
STATIC RAM
ARRAY 
1024 X 1024
STORE
RECALL
DQ
0
DQ
1
DQ
2
DQ
3
DQ
4
DQ
5
DQ
6
DQ
7
A
0
 A
1
 A
2
 A
3
 A
4
 A
10
 A
11
V
CC
V
CAP
Logic Block Diagram