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Cypress Semiconductor Electronic Components Datasheet

CY14E064PA Datasheet

64-Kbit (8 K x 8) SPI nvSRAM

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CY14E064PA pdf
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
Features
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)
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:
• 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
16-pin small outline integrated circuit (SOIC) package
Restriction of hazardous substances (RoHS) compliant
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.
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
8Kx8
SRAM
8Kx8
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: .0n0et1-68249 Rev. *A
• San Jose, CA 95134-1709 • 408-943-2600
Revised May 6, 2011
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Cypress Semiconductor Electronic Components Datasheet

CY14E064PA Datasheet

64-Kbit (8 K x 8) SPI nvSRAM

No Preview Available !

CY14E064PA pdf
CY14C064PA
CY14B064PA
CY14E064PA
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 ........................................ 17
Software STORE (STORE) Instruction ..................... 17
Software RECALL (RECALL) Instruction .................. 17
AutoStore Enable (ASENB) Instruction ..................... 17
AutoStore Disable (ASDISB) Instruction ................... 17
Special Instructions ....................................................... 17
SLEEP Instruction ..................................................... 17
Serial Number ................................................................. 18
WRSN (Serial Number Write) Instruction .................. 18
RDSN (Serial Number Read) Instruction ................... 19
FAST_RDSN (Fast Serial Number Read)
Instruction ......................................................................... 19
Device ID ......................................................................... 20
RDID (Device ID Read) Instruction ........................... 20
FAST_RDID (Fast Device ID Read) Instruction ........ 21
HOLD Pin Operation ................................................. 21
Real Time Clock Operation ............................................ 22
nvTIME Operation ..................................................... 22
Clock Operations ....................................................... 22
Reading the Clock ..................................................... 22
Setting the Clock ....................................................... 22
Backup Power ........................................................... 22
Stopping and Starting the Oscillator .......................... 22
Calibrating the Clock ................................................. 23
Alarm ......................................................................... 23
Watchdog Timer ........................................................ 23
Programmable Square Wave Generator ................... 24
Power Monitor ........................................................... 24
Backup Power Monitor .............................................. 24
Interrupts ................................................................... 24
Interrupt Register ....................................................... 24
Flags Register ........................................................... 25
Best Practices ................................................................. 31
Maximum Ratings ........................................................... 32
DC Electrical Characteristics ........................................ 32
Data Retention and Endurance ..................................... 33
Capacitance .................................................................... 33
Thermal Resistance ........................................................ 33
AC Test Conditions ........................................................ 34
RTC Characteristics ....................................................... 35
AC Switching Characteristics ....................................... 35
AutoStore or Power-Up RECALL .................................. 37
Switching Waveforms .................................................... 37
Software Controlled STORE/RECALL Cycles .............. 38
Hardware STORE Cycle ................................................. 39
Ordering Information ...................................................... 40
Ordering Code Definitions ......................................... 40
Package Diagram ............................................................ 41
Acronyms ........................................................................ 42
Document Conventions ................................................. 42
Units of Measure ....................................................... 42
Document History Page ................................................. 43
Sales, Solutions, and Legal Information ...................... 43
Worldwide Sales and Design Support ....................... 43
Products .................................................................... 43
PSoC Solutions ......................................................... 43
Document #: 001-68249 Rev. *A
Page 2 of 43
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Cypress Semiconductor Electronic Components Datasheet

CY14E064PA Datasheet

64-Kbit (8 K x 8) SPI nvSRAM

No Preview Available !

CY14E064PA pdf
CY14C064PA
CY14B064PA
CY14E064PA
Pinout
Figure 1. Pin Diagram - 16-pin SOIC
NC
VRTCbat
Xout
Xin
1
2
3
4
WP 5
HOLD
VRTCcap
VSS
6
7
8
16 VCC
15 INT/SQW
Top View
not to scale
14
13
12
VCAP
SO
SI
11 SCK
10 CS
9 HSB
Pin Definitions
Pin Name
CS
SCK
SI
SO
WP
HOLD
HSB
VCAP
VRTCcap
VRTCbat
Xout
Xin
INT/SQW
NC
VSS
VCC
I/O Type
Input
Input
Input
Output
Input
Input
Input/Output
Power supply
Power supply
Power supply
Output
Input
Output
No connect
Power supply
Power supply
Description
Chip select: Activates the device when pulled LOW. Driving this pin HIGH puts the device in low
power standby mode.
Serial clock: Runs at speeds up to a maximum of fSCK. Serial input is latched at the rising edge of
this clock. Serial output is driven at the falling edge of the clock.
Serial input: Pin for input of all SPI instructions and data.
Serial output: Pin for output of data through SPI.
Write Protect: Implements hardware write protection in SPI.
HOLD pin: Suspends Serial Operation.
Hardware STORE Busy: Output: Indicates busy status of nvSRAM when LOW. After each
Hardware and Software STORE operation HSB is driven HIGH for a short time (tHHHD) with
standard output high current and then a weak internal pull-up resistor keeps this pin HIGH (external
pull-up resistor connection optional).
Input: Hardware STORE implemented by pulling this pin LOW externally.
AutoStore capacitor. Supplies power to the nvSRAM during power loss to STORE data from the
SRAM to nonvolatile elements. If AutoStore is not needed, this pin must be left as No Connect. It
must never be connected to ground.
Capacitor backup for RTC: Left unconnected if VRTCbat is used.
Battery backup for RTC: Left unconnected if VRTCcap is used.
Crystal output connection
Crystal input connection
Interrupt output/calibration/square wave. Programmable to respond to the clock alarm, the
watchdog timer, and the power monitor. Also programmable to either active HIGH (push or pull) or
LOW (open drain). In calibration mode, a 512 Hz square wave is driven out. In the square wave
mode, you may select a frequency of 1 Hz, 512 Hz, 4,096 Hz, or 32,768 Hz to be used as a
continuous output.
No connect. This pin is not connected to the die.
Ground
Power supply
Document #: 001-68249 Rev. *A
Page 3 of 43
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Part Number CY14E064PA
Description 64-Kbit (8 K x 8) SPI nvSRAM
Maker Cypress Semiconductor
Total Page 30 Pages
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