Raspberry Pi ILI9341 TFT

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Introduction

The Adafruit board brings includes a chip that holds reset low when the voltage is below a threshold. The Adafruit chip is the APX803 from Mouser. I have chosen to use the ON Semiconductor MAX809, which is very similar. I have also used the STM1818, which works well.

The Board

MAX809 3-Pin Microprocessor Reset Monitor

Pinout.png Application.png
Pin Diagram Typical Application

3.06V ±2% Voltage Detector Supervisor STM1818TWX7F Active Low SOT-23

Stmpinout.png Stmapplication.png
Pin Diagram Typical Application

Connections

Pin Connections - ILI9341 TFT
WiringPi GPIO Pi ILI9341 ILI9341 Pi GPIO WiringPi
3V3 1 8 - LED 2 5V
8 GPIO2(SDA) 3 4 5V
9 GPIO3(SCL) 5 6 GND
7 GPIO4(GPCLK0) 7 8 GPIO14(TXD) 15
GND 9 10 GPIO15(RXD) 16
0 GPIO17 11 12 GPIO18 (PWM0) 1
2 GPIO27 13 14 GND
3 GPIO22 15 16 GPIO23 4
3V3 17 1 - VCC 18 GPIO24 5
12 GPIO10(MOSI) 19 6 - MOSI 2 - GND 20 GND
13 GPIO9(MISO) 21 9 - MISO 5 - D/C 22 GPIO25 6
14 GPIO11(SCLK) 23 7 - SCLK 3 - CS 24 GPIO8(CE0) 10
GND 25 26 GPIO7(CE1) 11
GPIO0(ID_SD) 27 28 GPIO1(ID_SC)
GPIO5 29 30 GND
GPIO6 31 32 GPIO12(PWM0)
GPIO13(PWM1) 33 34 GND
GPIO19(MISO) 35 36 GPIO16
GPIO26 37 38 GPIO20(MOSI)
GND 39 40 GPIO21(SCLK)

Links