CY14B101P(2011) 데이터 시트보기 (PDF) - Cypress Semiconductor

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CY14B101P
(Rev.:2011)

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

Cypress Semiconductor 

PRELIMINARY

CY14B101P

Contents

Pinouts .............................................................................. 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

Serial Peripheral Interface ............................................... 6

SPI Overview............................................................... 6

SPI Modes ......................................................................... 7

SPI Operating Features.................................................... 8

Power-Up .................................................................... 8

Power On Reset .......................................................... 8

Power-Down................................................................ 8

Active Power and Standby Power Modes ................... 8

SPI Functional Description.............................................. 8

Status Register ................................................................. 9

Read Status Register (RDSR) Instruction ................... 9

Write Status Register (WRSR) Instruction .................. 9

Write Protection and Block Protection......................... 10

Write Enable (WREN) Instruction.............................. 10

Write Disable (WRDI) Instruction .............................. 10

Block Protection ........................................................ 10

Hardware Write Protection (WP Pin)......................... 10

Memory Access .............................................................. 11

Read Sequence (READ) Instruction.......................... 11

Write Sequence (WRITE) Instruction ........................ 11

RTC Access..................................................................... 12

READ RTC (RDRTC) Instruction .............................. 13

WRITE RTC (WRTC) Instruction............................... 13

nvSRAM Special Instructions........................................ 14

Software STORE (STORE) Instruction ..................... 14

Software RECALL (RECALL) Instruction .................. 14

HOLD Pin Operation ................................................. 14

Real Time Clock Operation............................................ 15

nvTIME Operation ..................................................... 15

Clock Operations....................................................... 15

Reading the Clock ..................................................... 15

Setting the Clock ....................................................... 15

Backup Power ........................................................... 15

Stopping and Starting the Oscillator.......................... 15

Calibrating the Clock ................................................. 16

Alarm ......................................................................... 16

Watchdog Timer ........................................................ 16

Power Monitor ........................................................... 17

Interrupts ................................................................... 17

Flags Register ........................................................... 17

Accessing the Real Time Clock through SPI............. 18

Best Practices................................................................. 23

Maximum Ratings........................................................... 24

DC Electrical Characteristics ........................................ 24

Data Retention and Endurance .................................... 25

Capacitance .................................................................... 25

Thermal Resistance........................................................ 25

AC Test Conditions ........................................................ 25

RTC Characteristics ....................................................... 26

AC Switching Characteristics ....................................... 26

AutoStore or Power-Up RECALL .................................. 28

Software Controlled STORE/RECALL Cycles.............. 29

Hardware STORE Cycle ................................................. 30

Ordering Information...................................................... 31

Ordering Code Definition........................................... 31

Package Diagram ............................................................ 32

Acronyms ........................................................................ 33

Document Conventions ................................................. 33

Units of Measure ....................................................... 33

Document History Page ................................................. 34

Sales, Solutions, and Legal Information ...................... 35

Worldwide Sales and Design Support ....................... 35

Products .................................................................... 35

PSoC Solutions ......................................................... 35

Document #: 001-61932 Rev. *B

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