CY14B101P
1-Mbit (128 K × 8) Serial SPI nvSRAM
with Real Time Clock
1-Mbit (128
K × 8) Serial SPI nvSRAM with Real Time Clock
■ Write protection
❐ Hardware protection using Write Protect (WP) pin
Features
■ 1-Mbit nonvolatile static random access memory (nvSRAM)
❐ Internally organized as 128 K × 8
❐ Software protection using Write Disable instruction
❐ Software block protection for 1/4, 1/2, or entire array
❐ STORE to QuantumTrap nonvolatile elements initiated
automatically on power-down (AutoStore) or by user using
HSB pin (Hardware STORE) or SPI instruction (Software
STORE)
■ Low power consumption
❐ Single 3 V +20%, –10% operation
❐ Average active current of 10 mA at 40 MHz operation
❐ RECALL to SRAM initiated on power-up (Power-up
■ Industry standard configurations
❐ Industrial temperature
❐ 16-pin small outline integrated circuit (SOIC) package
❐ Restriction of hazardous substances (RoHS) compliant
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
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.
■ Real time clock (RTC)
❐ Full featured real time clock
❐ Watchdog timer
❐ Clock alarm with programmable interrupts
❐ Capacitor or battery backup for RTC
❐ Backup current of 0.35 µA (Typical)
■ 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
VCC
VCAP
QuantumTrap
128 K X 8
Power Control
CS
WP
SCK
Instruction decode
Write protect
Control logic
STORE/RECALL
Control
STORE
HSB
SRAM Array
HOLD
RECALL
128 K X 8
Instruction
register
D0-D7
A0-A16
X
out
in
Address
Decoder
RTC
X
INT
MUX
Data I/O register
Status Register
SO
SI
Cypress Semiconductor Corporation
Document Number: 001-44109 Rev. *M
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised August 3, 2012