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SPI COMMUNICATION BETWEEN ST7 AND EEPROM

5.2 HARDWARE DESCRIPTION

Two components were used for the application:

- 1 ST72264 MCU

- 1 M95040 EEPROM

Figure 2. Hardware description

SS pin of ST72264 is software driven (high state for a master device).

The SCK pin is connected to the serial clock pin (C) of the E²PROMs.

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

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

S pin of the EEPROM is connected to the PB3 output pin of ST72264.

5.3 FLOWCHARTS

Q

D

S

C

W

H

ST72264

110pF

M95040

1

SS (soft driven)

SCK

PB3

MISO

MOSI