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STK18TA8 Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers

Part No. STK18TA8
Description  nvTime Event Data Recorder Serial Peripheral Interface nvSRAM QuantumTrap CMOS Nonvolatile Static RAM
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STK18TA8 Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers

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April 2005
Document Control #ML0028 rev 0.8
1
STK18TA8
nvTime
TM Event Data Recorder
Serial Peripheral Interface nvSRAM
QuantumTrap
TM CMOS
Nonvolatile Static RAM
Preliminary
FEATURES
• Data integrity of Simtek nvSRAM Combined
with Full-Featured Real-Time Clock
• 40 MHZ SPI interface with compatible
commands to industry standards 1 Mbit SPI
EEPROMs
• STORE to QuantumTrap™ Nonvolatile
Elements is Initiated by Software , device pin
or AutoStore™ on Power Down
• RECALL to SRAM Initiated by Software or
Power Restore
• Unlimited READ and WRITE and RECALL
Cycles
• Watchdog Timer
• Clock Alarm with programmable Interrupts
• Capacitor or battery backup for RTC
• Single 3V +20%, -10% Operation
• Commercial and Industrial Temperatures
• High-reliability
o
Endurance to 1 Million Cycles
o
Retention to 100 years at 85 ºC
• Package: 48-Pin SSOP
DESCRIPTION
The Simtek STK18TA8 combines a 1 Mbit nonvolatile
static RAM and a full-featured real-time clock, in a
reliable, monolithic integrated circuit. A
Serial
Peripheral Interface (SPI) makes system integration
simple.
The
embedded
nonvolatile
elements
incorporate
Simtek’s QuantumTrap
TM
technology
producing the world’s most reliable nonvolatile
memory. The SRAM provides unlimited read and write
cycles, while independent, nonvolatile data resides in
the highly reliable QuantumTrap
TM cell. Data transfers
from the SRAM to the nonvolatile elements (the
STORE
operation) takes place automatically at power
down. On power up, data is restored to the SRAM (the
RECALL
operation) from the nonvolatile memory.
Both the STORE and RECALL operations are also
available under software control.
The Real-Time Clock function provides an accurate
clock with leap year tracking and a programmable,
high accuracy oscillator. The Alarm function is
programmable for one-time alarms or periodic
seconds, minutes, hours, or days. There is also a
programmable Watchdog Timer for process control.
BLOCK DIAGRAM
COLUMN DEC
COLUMN I/O
POWER
CONTROL
STORE/
RECALL
CONTROL
Quantum Trap
1024 X 1024
STATIC RAM
ARRAY
1024 X 1024
STORE
RECALL
VCC
VCAP
RTC
X1
X2
INT
VRTCbat
VRTCcap
Address
Data
SPI
CONTROLLER
SCK
SI
SO
CS
HSB
HOLD
Figure 1. Block Diagram


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