CY14B064P-104SFXI Просмотр технического описания (PDF) - Cypress Semiconductor

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CY14B064P-104SFXI

64-Kbit (8 K × 8) SPI nvSRAM with Real Time Clock

Cypress Semiconductor 

CY14C064PA

CY14B064PA

CY14E064PA

Pinout

Figure 1. 16-pin SOIC pinout

NC 1

VRTCbat 2

Xout 3

Xin 4

WP 5

HOLD 6

VRTCcap 7

VSS

8

16 VCC

15 INT/SQW

14

Top View 13

not to scale

12

VCAP

SO

SI

11 SCK

10 CS

9 HSB

Pin Definitions

Pin Name I/O Type

Description

CS

Input Chip select: Activates the device when pulled LOW. Driving this pin HIGH puts the device in low power

standby mode.

SCK

Input

Serial clock: Runs at speeds up to a maximum of fSCK. Serial input is latched at the rising edge of this

clock. Serial output is driven at the falling edge of the clock.

SI

Input Serial input: Pin for input of all SPI instructions and data.

SO

Output Serial output: Pin for output of data through SPI.

WP

Input Write Protect: Implements hardware write protection in SPI.

HOLD

Input HOLD pin: Suspends Serial Operation.

HSB

Input/Output Hardware STORE Busy: Output: Indicates busy status of nvSRAM when LOW. After each Hardware

and Software STORE operation HSB is driven HIGH for a short time (tHHHD) with standard output high

current and then a weak internal pull-up resistor keeps this pin HIGH (external pull-up resistor

connection optional).

Input: Hardware STORE implemented by pulling this pin LOW externally.

VCAP

Power supply AutoStore capacitor. Supplies power to the nvSRAM during power loss to STORE data from the SRAM

to nonvolatile elements. If AutoStore is not needed, this pin must be left as No Connect. It must never

be connected to ground.

VRTCcap[2]

VRTCbat[2]

Xout[2]

Power supply Capacitor backup for RTC: Left unconnected if VRTCbat is used.

Power supply Battery backup for RTC: Left unconnected if VRTCcap is used.

Output Crystal output connection

Xin[2]

Input Crystal input connection

[2]

INT/SQW

Output

Interrupt output/calibration/square wave. Programmable to respond to the clock alarm, the watchdog

timer, and the power monitor. Also programmable to either active HIGH (push or pull) or LOW (open

drain). In calibration mode, a 512 Hz square wave is driven out. In the square wave mode, you may

select a frequency of 1 Hz, 512 Hz, 4,096 Hz, or 32,768 Hz to be used as a continuous output.

NC

No connect No connect. This pin is not connected to the die.

VSS

Power supply Ground

VCC

Power supply Power supply

Note

2. Left unconnected if RTC feature is not used.

Document Number: 001-68249 Rev. *F

Page 3 of 44

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