©2011 Silicon Storage Technology, Inc.

DS25071A

12/11

4

32 Mbit SPI Serial Flash

SST25VF032B

Data Sheet

A Microchip Technology Company

Pin Description

Figure 2: Pin Assignments for 8-Lead SOIC

Table 1: Pin Description

Symbol

Pin Name

Functions

SCK

Serial Clock

To provide the timing of the serial interface.

Commands, addresses, or input data are latched on the rising edge of the clock

input, while output data is shifted out on the falling edge of the clock input.

SI

Serial Data Input

To transfer commands, addresses, or data serially into the device.

Inputs are latched on the rising edge of the serial clock.

SO

Serial Data Output To transfer data serially out of the device.

Data is shifted out on the falling edge of the serial clock.

RY/BY#

Ready / Busy pin

Flash busy status pin in AAI mode if SO is configured as a hardware RY/BY#

pin.

CE#

Chip Enable

The device is enabled by a high to low transition on CE#. CE# must remain low

for the duration of any command sequence.

WP#

Write Protect

The Write Protect (WP#) pin is used to enable/disable BPL bit in the status reg-

ister.

HOLD#

Hold

To temporarily stop serial communication with SPI flash memory without reset-

ting the device.

Power Supply

To provide power supply voltage: 2.7-3.6V

Ground

T1.0 25071

1

2

3

4

8

7

6

5

CE#

SO

WP#

HOLD#

SCK

SI

Top View

1327 8-SOIC P1.0

Note: In AAI mode, the SO pin can act as a RY/BY# pin when configured as a ready/busy status pin. See “End-of-

Write Detection” on page 12. for details.

1

2

3

4

8

7

6

5

CE#

SO

WP#

Top View

HOLD#

SCK

SI

1327 8-WSON P1.0