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
- ILI9341 TFT Touch Screen
ILI9341 TFT Touch Screen - Top
ILI9341 TFT Touch Screen - Underside
MAX809 3-Pin Microprocessor Reset Monitor
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|
Pin Diagram |
Typical Application
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3.06V ±2% Voltage Detector Supervisor STM1818TWX7F Active Low SOT-23
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Pin Diagram |
Typical Application
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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) |
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Links