CY14C064PA
CY14B064PA
CY14E064PA
64-Kbit (8 K × 8) SPI nvSRAM
with Real Time Clock
64-Kbit (8
K × 8) SPI nvSRAM with Real Time Clock
■ Write protection
Features
❐ Hardware protection using Write Protect (WP) pin
❐ Software protection using Write Disable instruction
❐ Software block protection for 1/4, 1/2, or entire array
■ 64-Kbit nonvolatile static random access memory (nvSRAM)
❐ Internally organized as 8 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)
❐ RECALLtoSRAMinitiatedonpower-up(PowerUpRECALL)
or by SPI instruction (Software RECALL)
■ Low power consumption
❐ Average active current of 3 mA at 40 MHz operation
❐ Average standby mode current of 250 A
❐ Sleep mode current of 8 A
■ Industry standard configurations
❐ Operating voltages:
• CY14C064PA : VCC = 2.4 V to 2.6 V
• CY14B064PA : VCC = 2.7 V to 3.6 V
• CY14E064PA : VCC = 4.5 V to 5.5 V
❐ Industrial temperature
❐ 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 85C
❐ 16-pin small outline integrated circuit (SOIC) package
❐ Restriction of hazardous substances (RoHS) compliant
■ Real time clock (RTC)
❐ Full-featured RTC
❐ Watchdog timer
❐ Clock alarm with programmable interrupts
❐ Backup power fail indication
Overview
The Cypress CY14X064PA combines a 64 Kbit nvSRAM[1] with
a full-featured RTC in a monolithic integrated circuit with serial
SPI interface. The memory is organized as 8 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.
❐ 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 A (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
VRTCcap VRTCbat
VCC VCAP
Logic Block Diagram
Serial Number
8 x 8
Power Control
Block
Manufacturer ID /
Product ID
QuantumTrap
8 K x 8
SLEEP
STORE
RECALL
SRAM
8 K x 8
RDSN/WRSN/RDID
READ/WRITE
SI
CS
Memory
Data &
Address
Control
SPI Control Logic
Write Protection
Instruction decoder
STORE/RECALL/ASENB/ASDISB
SCK
WP
SO
WRSR/RDSR/WREN
RDRTC/WRTC
Status Register
Xin
RTC Control Logic
Registers
INT/SQW
Xout
Counters
Note
1. This device will be referred to as nvSRAM throughout the document.
Cypress Semiconductor Corporation
Document Number: 001-68249 Rev. *C
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised July 24, 2012
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