CY14B512P

Document Number: 001-53872 Rev. *H

Page 3 of 34

Pinouts

Figure 1. 16-pin SOIC pinout

INT

WP

V

CAP

1

2

3

4

5

6

7

8

9

10

11

12

13

NC

16

15

14

V

CC

SO

SI

SCK

CS

HSB

HOLD

Top View

not to scale

VRTCbat

Xout

Xin

V

RTCcap

V

SS

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

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

internal pull-up resistor keeps this pin HIGH (an external pull-up resistor connection is optional).

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

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.

Xout[2]

Output

Crystal output connection. Drives crystal on start up.

Xin[2]

Input

Crystal input connection. For 32.768 kHz crystal.

INT

[2]

Output

Interrupt output. Programmable to respond to the clock alarm, the watchdog timer, and the power

monitor. It is also programmable to either active HIGH (push or pull) or LOW (open drain).

NC

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

Power supply Ground.

Power supply Power supply (2.7 V to 3.6 V).

Note

2. Left unconnected if RTC feature is not used.