CY14B101P(2011) Ver la hoja de datos (PDF) - Cypress Semiconductor

Número de pieza

componentes Descripción

Fabricante

CY14B101P
(Rev.:2011)

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

Cypress Semiconductor 

PRELIMINARY

CY14B101P

1-Mbit (128 K × 8) Automotive Serial (SPI)

nvSRAM with Real Time Clock

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

Features

■ 1 Mbit nonvolatile static random access memory (nvSRAM)

❐ Internally organized as 128 K × 8

❐ STORE to QuantumTrap nonvolatile elements initiated

automatically on power-down (AutoStore) or by the user

using HSB pin (hardware STORE) or SPI instruction

(Software 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

❐ STORE cycles to QuantumTrap

• Automotive-A: 1,000 K STORE cycles

• Automotive-E: 100 K STORE cycles

❐ Data retention

• Automotive-A: 20 years

• Automotive-E: 2 years

■ Real time clock

❐ Full-featured real time clock

❐ Watchdog timer

❐ Clock alarm with programmable interrupts

❐ Capacitor or battery backup for RTC

❐ Backup current of 0.35 uA (typ)

■ High-speed serial peripheral interface (SPI)

❐ 40 MHz clock rate - SRAM memory access

❐ 25 MHz clock rate - RTC memory access

❐ Supports SPI mode 0 (0,0) and mode 3 (1,1)

Logic Block Diagram

■ Write protection

❐ Hardware protection using Write Protect (WP) pin

❐ Software protection using the Write Disable Instruction

❐ Software block protection for one-quarter, one-half, or entire

array

■ Low power consumption

❐ Operating voltages:

• Automotive-A: VCC = 2.7 V to 3.6 V

• Automotive-E: VCC = 3.0 V to 3.6 V

❐ Average active current of 10 mA at 40 MHz operation

■ Industry standard configurations

❐ Temperature ranges

• Automotive-A: –40 °C to +85 °C

• Automotive-E: –40 °C to +125 °C

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

❐ Pb-free and restriction of hazardous substances (RoHS)

compliant

Overview

The Cypress CY14B101P combines a 1 Mbit nonvolatile static

RAM with full-featured real time clock in a monolithic integrated

circuit with serial SPI interface. The memory is organized as

128 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). The STORE and RECALL operations can also be

initiated by the user through SPI instruction.

VCC

VCAP

CS

WP

SCK

HOLD

Instruction decode

Write protect

Control logic

QuantumTrap

128 K X 8

SRAM Array

128 K X 8

STORE

RECALL

Power Control

STORE/RECALL

Control

HSB

Instruction

register

D0-D7

Address

Decoder

A0-A16

RTC

Xout

X in

INT

SI

Data I/O register

MUX

SO

Status Register

Cypress Semiconductor Corporation • 198 Champion Court

Document #: 001-61932 Rev. *B

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

Revised July 22, 2011

Share Link: