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STR71x BSPI COMMUNICATION WITH M25P10-A SERIAL FLASH

4 COMMUNICATION BETWEEN STR71X AND SERIAL FLASH MEMORY

The software included with this application note offers a set of functions allowing communica-

tion with the flash memory. The complete software can be found on the ST internet website. It

is a particular example and it is up to you to adapt it to your specific application.

4.1 HARDWARE DESCRIPTION

Two components were used for the application:

– 1 STR71x MCU device.

– 1 M25P10-A Serial Flash Memory

Figure 2. Hardware overview

S1.SSN pin of STR71x is hardware driven (high level for a master device).

The S1.SCLK pin is connected to the serial clock pin (C) of the Serial Flash Memory.

The S1.MOSI pin to the serial input pins (D).

The S1.MISO pin to the serial output pins (Q).

S pin of the Serial Flash Memory is connected to the P0.3 output pin of the STR71x.

4.2 SOFTWARE IMPLEMENTATION

In this application note the software modules are developed in C language, with RVDK envi-

ronment.

The software implemented in order to manage write and read operations between the

STR71x BSPI interface and the M25P10-A is described below.

It is made up of 4 parts:

S

Q

W

D

H

S1.SSN

S1.SCLK

S1.MISO

S1.MOSI

P0.3

1

cc

V

C

cc

V

M25P10-A

C 100nF

cc

V

cc

V

STR71x

10K