AN970 Datasheet, PDF (7/10 Pages) STMicroelectronics – SPI COMMUNICATION BETWEEN ST7 AND EEPROM

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
110pF
S
V_CC
Q
H
V_CC
W
C
V_SS
V_SS
D
M95040
V_CC
V_CC
1
V_CC
V_CC
V_SS
V_SS
SS (soft driven)
SCK
MISO
MOSI
PB3
ST72264
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
The flowchart of the application is presented below (Figure 3).
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