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Cypress Semiconductor Electronic Components Datasheet

CY14B104K Datasheet

4-Mbit (512 K X 8/256 K X 16) nvSRAM

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CY14B104K pdf
CY14B104K, CY14B104M
4-Mbit (512 K × 8/256 K × 16) nvSRAM
with Real Time Clock
Features
25 ns and 45 ns access times
Internally organized as 512 K × 8 (CY14B104K) or 256 K × 16
(CY14B104M)
Hands off automatic STORE on power-down with only a small
capacitor
STORE to QuantumTrap nonvolatile elements is initiated by
software, device pin, or AutoStore on power-down
RECALL to SRAM is initiated by software or power-up
High reliability
Infinite read, write, and RECALL cycles
1 million STORE cycles to QuantumTrap
20 year data retention
Single 3-V +20%, –10% operation
Data integrity of Cypress nvSRAM combined with full-featured
real time clock (RTC)
Watchdog timer
Clock alarm with programmable interrupts
Capacitor or battery backup for RTC
Industrial temperature
44-pin and 54-pin thin small outline package (TSOP II)
Pb-free and restriction of hazardous substances (RoHS)
compliant
Functional Description
The Cypress CY14B104K and CY14B104M combines a 4-Mbit
nonvolatile static RAM (nvSRAM) with a full-featured RTC in a
monolithic integrated circuit. The embedded nonvolatile
elements incorporate QuantumTrap technology producing the
world’s most reliable nonvolatile memory. The SRAM is read and
written infinite number of times, while independent nonvolatile
data resides in the nonvolatile elements.
The RTC function provides an accurate clock with leap year
tracking and a programmable, high accuracy oscillator. The
alarm function is programmable for periodic minutes, hours,
days, or months alarms. There is also a programmable watchdog
timer for process control.
Logic Block Diagram[1, 2, 3]
www.DataSheet4U.com
A0
A1
A2
A3
A4
A5
A6
A7
A8
A17
A18
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
Quatrum
Trap
VCC
VCA
P
2048 X 2048
R
O
STORE
POWER
CONTROL
VRTCbat
VRTCcap
W RECALL
D
E STATIC RAM
C ARRAY
O 2048 X 2048
D
E
R
STORE/RECALL
CONTROL
SOFTWARE
DETECT
HSB
A14 - A2
I
N
P
U
T
B COLUMN I/O
U
F
F
E
R COLUMN DEC
S
A9 A10 A11 A12 A13 A14 A15 A16
RTC
MUX
Xout
Xin
INT
A18- A0
OE
WE
CE
BLE
Notes
1. Address A0 - A18 for ×8 configuration and Address A0 - A17 for ×16 configuration.
2. Data DQ0 - DQ7 for ×8 configuration and Data DQ0 - DQ15 for ×16 configuration.
3. BHE and BLE are applicable for ×16 configuration only.
Cypress Semiconductor Corporation • 198 Champion Court
Document #: 001-07103 Rev. *S
BHE
• San Jose, CA 95134-1709 • 408-943-2600
Revised January 21, 2011
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Cypress Semiconductor Electronic Components Datasheet

CY14B104K Datasheet

4-Mbit (512 K X 8/256 K X 16) nvSRAM

No Preview Available !

CY14B104K pdf
CY14B104K, CY14B104M
Contents
Device Operation .............................................................. 4
SRAM Read ....................................................................... 4
SRAM Write ....................................................................... 4
AutoStore Operation ........................................................ 4
Hardware STORE (HSB) Operation ................................. 5
Hardware RECALL (Power-Up) ....................................... 5
Software STORE ............................................................... 5
Software RECALL ............................................................. 5
Preventing AutoStore ....................................................... 6
Data Protection ................................................................. 7
Noise Considerations ....................................................... 7
Real Time Clock Operation .............................................. 7
nvTIME Operation ....................................................... 7
Clock Operations ......................................................... 7
Reading the Clock ....................................................... 7
Setting the Clock ......................................................... 7
Backup Power ............................................................. 7
Stopping and Starting the Oscillator ............................ 8
Calibrating the Clock ................................................... 8
Alarm ........................................................................... 8
Watchdog Timer .......................................................... 8
Power Monitor ............................................................. 9
Interrupts ..................................................................... 9
Flags Register ........................................................... 10
Best Practices ................................................................. 15
Maximum Ratings ........................................................... 16
Operating Range ............................................................. 16
DC Electrical Characteristics ........................................ 16
Data Retention and Endurance ..................................... 17
Capacitance .................................................................... 17
Thermal Resistance ........................................................ 17
AC Test Conditions ........................................................ 17
RTC Characteristics ....................................................... 18
AC Switching Characteristics ....................................... 19
SRAM Read Cycle .................................................... 19
SRAM Write Cycle ..................................................... 19
Switching Waveforms .................................................... 21
AutoStore/Power-Up RECALL ....................................... 22
Switching Waveforms .................................................... 22
Software Controlled STORE and RECALL Cycle ........ 23
Hardware STORE Cycle ................................................. 24
Truth Table For SRAM Operations ................................ 25
For x8 Configuration .................................................. 25
For x16 Configuration ................................................ 25
Ordering Information ...................................................... 26
Ordering Code Definition ........................................... 26
Package Diagrams .......................................................... 27
Acronyms ........................................................................ 28
Document Conventions ............................................. 28
Units of Measure ....................................................... 28
Document History Page ................................................. 29
Sales, Solutions, and Legal Information ...................... 33
Worldwide Sales and Design Support ....................... 33
Products .................................................................... 33
PSoC Solutions ......................................................... 33
www.DataSheet4U.com
Document #: 001-07103 Rev. *S
Page 2 of 33
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Part Number CY14B104K
Description 4-Mbit (512 K X 8/256 K X 16) nvSRAM
Maker Cypress Semiconductor
Total Page 30 Pages
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