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STK17TA8-RF25I 数据表(PDF) 1 Page - Cypress Semiconductor

部件名 STK17TA8-RF25I
功能描述  128k X 8 AutoStore nvSRAM with Real Time Clock
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制造商  CYPRESS [Cypress Semiconductor]
网页  http://www.cypress.com
标志 CYPRESS - Cypress Semiconductor

STK17TA8-RF25I 数据表(HTML) 1 Page - Cypress Semiconductor

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STK17TA8
128k X 8 AutoStore™ nvSRAM
with Real Time Clock
Cypress Semiconductor Corporation
198 Champion Court
San Jose
, CA 95134-1709
408-943-2600
Document #: 001-52039 Rev. **
Revised March 02, 2009
Features
nvSRAM Combined with Integrated Real Time Clock Functions
(RTC, Watchdog Timer, Clock Alarm, Power Monitor)
Capacitor or Battery Backup for RTC
25, 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 V +20%, -10% Power Supply
Commercial and Industrial Temperatures
48-pin 300-mil SSOP Package (RoHS-Compliant)
Description
The Cypress STK17TA8 combines a 1 Mb nonvolatile static RAM
(nvSRAM) with a full featured real time clock in a reliable,
monolithic integrated circuit.
The 1 Mb nvSRAM is a fast static RAM with a nonvolatile
Quantum Trap storage element included with each memory cell.
The SRAM provides the 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 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
minutes, hours, or days alarms. There is also a programmable
watchdog timer for processor control.
Logic Block Diagram
COLUMN DEC
G
E
W
COLUMN I/O
POWER
CONTROL
HSB
STORE/
RECALL
CONTROL
SOFTWARE
DETECT
A15 – A0
A5
A6
A7
A8
A9
A12
A13
A14
A15
A16
Quantum Trap
1024 X 1024
STATIC RAM
ARRAY
1024 X 1024
STORE
RECALL
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
A0 A1 A2 A3 A4 A10 A11
VCC
VCAP
RTC
MUX
A16 – A0
X1
X2
INT
VRTCbat
VRTCcap
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