Cypress Semiconductor Electronic Components Datasheet

CY14B101PA Datasheet

1-Mbit (128K x 8) Serial (SPI) nvSRAM

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CY14C101PA

CY14B101PA

CY14E101PA

1-Mbit (128K × 8) Serial (SPI) nvSRAM

with Real-Time Clock

1-Mbit (128K × 8) Serial (SPI) nvSRAM with Real Time Clock

Features

■ 1-Mbit nonvolatile static random access memory (nvSRAM)

❐ Internally organized as 128K × 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:

• CY14C101PA: VCC = 2.4 V to 2.6 V

• CY14B101PA: VCC = 2.7 V to 3.6 V

• CY14E101PA: VCC = 4.5 V to 5.5 V

❐ Industrial temperature

❐ 16-pin small outline integrated circuit (SOIC) package

❐ Restriction of hazardous substances (RoHS) compliant

Functional Description

The Cypress CY14X101PA combines a 1-Mbit nvSRAM[1] with

a full-featured RTC in a monolithic integrated circuit with serial

SPI interface. The memory is organized as 128K 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.

For a complete list of related documentation, click here.

Serial Number

8x8

SCK

Power Control

Block

SLEEP

SPI Control Logic

Write Protection

Instruction decoder

Manufacturer ID /

Product ID

RDSN/WRSN/RDID

READ/WRITE

STORE/RECALL/ASENB/ASDISB

Memory Data

Address Control

Quantum Trap

128 K x 8

SRAM

128 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

Document Number: 001-54392 Rev. *P

• San Jose, CA 95134-1709 • 408-943-2600

Revised November 13, 2017

Cypress Semiconductor Electronic Components Datasheet

CY14B101PA Datasheet

1-Mbit (128K x 8) Serial (SPI) nvSRAM

No Preview Available !

CY14C101PA

CY14B101PA

CY14E101PA

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-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

RTC External Components ....................................... 25

PCB Design Considerations for RTC ............................ 26

Layout requirements .................................................. 26

Maximum Ratings ........................................................... 31

Operating Range ............................................................. 31

DC Electrical Characteristics ........................................ 31

Data Retention and Endurance ..................................... 32

Capacitance .................................................................... 32

Thermal Resistance ........................................................ 33

AC Test Loads and Waveforms ..................................... 33

AC Test Conditions ........................................................ 33

RTC Characteristics ....................................................... 34

AC Switching Characteristics ....................................... 34

Switching Waveforms .................................................... 35

AutoStore or Power-Up RECALL .................................. 36

Switching Waveforms .................................................... 37

Software Controlled STORE/RECALL Cycles .............. 38

Switching Waveforms .................................................... 38

Hardware STORE Cycle ................................................. 39

Switching Waveforms .................................................... 39

Ordering Information ...................................................... 40

Ordering Code Definitions ......................................... 40

Package Diagram ............................................................ 41

Acronyms ........................................................................ 42

Document Conventions ................................................. 42

Units of Measure ....................................................... 42

Errata ............................................................................... 43

Part Numbers Affected .............................................. 43

Qualification Status ................................................... 43

Errata Summary ........................................................ 43

Document History Page ................................................. 44

Sales, Solutions, and Legal Information ...................... 46

Worldwide Sales and Design Support ....................... 46

Products .................................................................... 46

PSoC®Solutions ....................................................... 46

Cypress Developer Community ................................. 46

Technical Support ..................................................... 46

Document Number: 001-54392 Rev. *P

Page 2 of 46

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CY14B101PA Datasheet

1-Mbit (128K x 8) Serial (SPI) nvSRAM

CY14B101PA Datasheet

1-Mbit (128K x 8) Serial (SPI) nvSRAM

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