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Cypress Semiconductor Electronic Components Datasheet



CY14E512PA

512-Kbit (64 K x 8) SPI nvSRAM


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CY14E512PA pdf
CY14C512PA
CY14B512PA
CY14E512PA
512-Kbit (64 K × 8) SPI nvSRAM
with Real Time Clock
512-Kbit (64 K × 8) SPI nvSRAM with Real Time Clock
Features
512-Kbit nonvolatile static random access memory (nvSRAM)
Internally organized as 64 K × 8
STORE to QuantumTrap nonvolatile elements initiated
automatically on power-down (AutoStore) or by using SPI
instruction (Software STORE) or HSB pin (Hardware
STORE)
RECALL to SRAM initiated on power-up (Power-Up
RECALL) or by SPI instruction (Software RECALL)
Automatic STORE on power-down with a small capacitor
High reliability
Infinite read, write, and RECALL cycles
1 million STORE cycles to QuantumTrap
Data retention: 20 years at 85 C
Real time clock (RTC)
Full-featured RTC
Watchdog timer
Clock alarm with programmable interrupts
Backup power fail indication
Square wave output with programmable frequency (1 Hz,
512 Hz, 4096 Hz, 32.768 kHz)
Capacitor or battery backup for RTC
Backup current of 0.45 µA (typical)
40 MHz, and 104 MHz High-speed serial peripheral interface
(SPI)
40 MHz clock rate SPI write and read with zero cycle delay
104 MHz clock rate SPI write and read (with special fast read
instructions)
Supports SPI mode 0 (0,0) and mode 3 (1,1)
SPI access to special functions
Nonvolatile STORE/RECALL
8-byte serial number
Manufacturer ID and Product ID
Sleep mode
Logic Block Diagram
VCC VCAP VRTCcap VRTCbat
Write protection
Hardware protection using Write Protect (WP) pin
Software protection using Write Disable instruction
Software block protection for 1/4, 1/2, or entire array
Low power consumption
Average active current of 3 mA at 40 MHz operation
Average standby mode current of 250 µA
Sleep mode current of 8 µA
Industry standard configurations
Operating voltages:
• CY14C512PA : VCC = 2.4 V to 2.6 V
• CY14B512PA : VCC = 2.7 V to 3.6 V
• CY14E512PA : VCC = 4.5 V to 5.5 V
Industrial temperature
16-pin small outline integrated circuit (SOIC) package
Restriction of hazardous substances (RoHS) compliant
Overview
The Cypress CY14X512PA combines a 512-Kbit nvSRAM[1] with
a full-featured RTC in a monolithic integrated circuit with serial
SPI interface. The memory is organized as 64 K words of 8 bits
each. The embedded nonvolatile elements incorporate the
QuantumTrap technology, creating the world’s most reliable
nonvolatile memory. The SRAM provides infinite read and write
cycles, while the QuantumTrap cells provide highly reliable
nonvolatile storage of data. Data transfers from SRAM to the
nonvolatile elements (STORE operation) takes place
automatically at power-down. On power-up, data is restored to
the SRAM from the nonvolatile memory (RECALL operation).
You can also initiate the STORE and RECALL operations
through SPI instruction.
Serial Number
8x8
SI
CS
SCK
WP
SO
Power Control
Block
SLEEP
SPI Control Logic
Write Protection
Instruction decoder
Manufacture ID/
Product ID
RDSN/WRSN/RDID
READ/WRITE
STORE/RECALL/ASENB/ASDISB
Memory
Data &
Address
Control
QuantrumTrap
64 K x 8
SRAM
64 K x 8
STORE
RECALL
RDRTC/WRTC
WRSR/RDSR/WREN
Status Register
Xin
INT/SQW
Xout
RTC Control Logic
Registers
Counters
Note
1. This device will be referred to as nvSRAM throughout the document.
Cypress Semiconductor Corporation • 198 Champion Court
wwwD.DocautamSheenett4#U: .0n0et1-65268 Rev. *B
• San Jose, CA 95134-1709 • 408-943-2600
Revised May 5, 2011
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CY14E512PA pdf
CY14C512PA
CY14B512PA
CY14E512PA
Contents
Pinout ................................................................................ 3
Pin Definitions .................................................................. 3
Device Operation .............................................................. 4
SRAM Write ................................................................. 4
SRAM Read ................................................................ 4
STORE Operation ....................................................... 4
AutoStore Operation .................................................... 4
Software STORE Operation ........................................ 5
Hardware STORE and HSB pin Operation ................. 5
RECALL Operation ...................................................... 5
Hardware RECALL (Power-Up) .................................. 5
Software RECALL ....................................................... 5
Disabling and Enabling AutoStore ............................... 5
Serial Peripheral Interface ............................................... 6
SPI Overview ............................................................... 6
SPI Modes ......................................................................... 7
SPI Operating Features .................................................... 8
Power-Up .................................................................... 8
Power-On Reset .......................................................... 8
Power Down ................................................................ 8
Active Power and Standby Power Modes ................... 8
SPI Functional Description .............................................. 9
Status Register ............................................................... 10
Read Status Register (RDSR) Instruction ................. 10
Fast Read Status Register (FAST_RDSR)
Instruction ......................................................................... 10
Write Status Register (WRSR) Instruction ................ 10
Write Protection and Block Protection ......................... 11
Write Enable (WREN) Instruction .............................. 11
Write Disable (WRDI) Instruction .............................. 12
Block Protection ........................................................ 12
Hardware Write Protection (WP Pin) ......................... 12
Memory Access .............................................................. 12
Read Sequence (READ) Instruction .......................... 12
Fast Read Sequence (FAST_READ) Instruction ...... 12
Write Sequence (WRITE) Instruction ........................ 13
RTC Access ..................................................................... 15
READ RTC (RDRTC) Instruction .............................. 15
Fast Read Sequence (FAST_RDRTC) Instruction .... 15
WRITE RTC (WRTC) Instruction ............................... 16
nvSRAM Special Instructions ........................................ 16
Software STORE (STORE) Instruction ..................... 16
Software RECALL (RECALL) Instruction .................. 16
AutoStore Enable (ASENB) Instruction ..................... 16
AutoStore Disable (ASDISB) Instruction ................... 17
Special Instructions ....................................................... 17
SLEEP Instruction ..................................................... 17
Serial Number ................................................................. 17
WRSN (Serial Number Write) Instruction .................. 17
RDSN (Serial Number Read) Instruction ................... 18
FAST_RDSN (Fast Serial Number Read)
Instruction ......................................................................... 18
Device ID ......................................................................... 19
RDID (Device ID Read) Instruction ........................... 19
FAST_RDID (Fast Device ID Read) Instruction ........ 20
HOLD Pin Operation ................................................. 20
Real Time Clock Operation ............................................ 21
nvTIME Operation ..................................................... 21
Clock Operations ....................................................... 21
Reading the Clock ..................................................... 21
Setting the Clock ....................................................... 21
Backup Power ........................................................... 21
Stopping and Starting the Oscillator .......................... 21
Calibrating the Clock ................................................. 22
Alarm ......................................................................... 22
Watchdog Timer ........................................................ 22
Programmable Square Wave Generator ................... 23
Power Monitor ........................................................... 23
Backup Power Monitor .............................................. 23
Interrupts ................................................................... 23
Interrupt Register ....................................................... 23
Flags Register ........................................................... 24
Best Practices ................................................................. 30
Maximum Ratings ........................................................... 31
DC Electrical Characteristics ........................................ 31
Data Retention and Endurance ..................................... 32
Capacitance .................................................................... 32
Thermal Resistance ........................................................ 32
AC Test Conditions ........................................................ 33
RTC Characteristics ....................................................... 34
AC Switching Characteristics ....................................... 34
AutoStore or Power-Up RECALL .................................. 36
Switching Waveforms .................................................... 36
Software Controlled STORE/RECALL Cycles .............. 37
Hardware STORE Cycle ................................................. 38
Ordering Information ...................................................... 39
Ordering Code Definitions ......................................... 39
Package Diagram ............................................................ 40
Acronyms ........................................................................ 41
Document Conventions ................................................. 41
Units of Measure ....................................................... 41
Document History Page ................................................. 42
Sales, Solutions, and Legal Information ...................... 43
Worldwide Sales and Design Support ....................... 43
Products .................................................................... 43
PSoC Solutions ......................................................... 43
Document #: 001-65268 Rev. *B
Page 2 of 43
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Part Number CY14E512PA
Description 512-Kbit (64 K x 8) SPI nvSRAM
Maker Cypress Semiconductor - Cypress Semiconductor
Total Page 30 Pages
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