Datasheet > CY14C256PA

CY14C256PA

更新时间： 2024-11-06 12:50:07

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		静态存储器时钟
页数	文件大小	规格书
44页	1650K
描述
256-Kbit (32 K x 8) SPI nvSRAM with Real Time Clock Infinite read, write, and RECALL cycles

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CY14C256PA 数据手册

CY14C256PA

CY14B256PA

CY14E256PA

256-Kbit (32 K × 8) SPI nvSRAM

with Real Time Clock

256-Kbit (32

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

■ 256-Kbit nonvolatile static random access memory (nvSRAM)

❐ Internally organized as 32 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:

• CY14C256PA : V_CC= 2.4 V to 2.6 V

• CY14B256PA : V_CC= 2.7 V to 3.6 V

• CY14E256PA : V_CC= 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 85C

❐ 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 CY14X256PA combines a 256-Kbit nvSRAM^[1]with

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

SPI interface. The memory is organized as 32 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 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

V_RTCcapV_RTCbat

V_CCV_CAP

Serial Number

8 x 8

Logic Block Diagram

Power Control

Block

Manufacture ID/

Product ID

QuantrumTrap

32 K x 8

SLEEP

STORE

RECALL

SRAM

32 K x 8

RDSN/WRSN/RDID

READ/WRITE

Memory

Data &

Address

Control

SPI Control Logic

Write Protection

Instruction decoder

STORE/RECALL/ASENB/ASDISB

SCK

WRSR/RDSR/WREN

RDRTC/WRTC

Status Register

X_in

INT/SQW

X_out

RTC Control Logic

Registers

Counters

Note

1. This device will be referred to as nvSRAM throughout the document.

Cypress Semiconductor Corporation

Document #: 001-65281 Rev. *B

•

198 Champion Court

•

San Jose, CA 95134-1709

•

408-943-2600

Revised May 4, 2011

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与CY14C256PA相关器件

型号	品牌	获取价格	描述	数据表
CY14C256PA_12	CYPRESS	获取价格	256-Kbit (32 K Ã 8) SPI nvSRAM with Real Tim
CY14C256PA_13	CYPRESS	获取价格	256-Kbit (32 K x 8) SPI nvSRAM with Real Time Clock
CY14C256Q	CYPRESS	获取价格	256-Kbit (32 K x 8) SPI nvSRAM Infinite read, write, and RECALL cycles
CY14C256Q_12	CYPRESS	获取价格	256-Kbit (32 K Ã 8) SPI nvSRAM
CY14C512I	CYPRESS	获取价格	512-Kbit (64 K x 8) Serial (I2C) nvSRAM with Real Time Clock
CY14C512I_12	CYPRESS	获取价格	512-Kbit (64 K Ã 8) Serial (I2C) nvSRAM with
CY14C512I_13	CYPRESS	获取价格	512-Kbit (64 K x 8) Serial (I2C) nvSRAM with Real Time Clock
CY14C512J	CYPRESS	获取价格	512-Kbit (64 K x 8) Serial (I2C) nvSRAM Infinite read, write, and RECALL cycles
CY14C512J_12	CYPRESS	获取价格	512-Kbit (64 K Ã 8) Serial (I2C) nvSRAM
CY14C512J_13	CYPRESS	获取价格	512-Kbit (64 K x 8) Serial (I2C) nvSRAM

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