PCB

PCB BOARD DESIGN SPECIFICATIONS

Must haves - STM development board should be able to be attached - Module headers for peripheral devices (figure out specifications for header modules) - Power rails for 3.3v and 5.0v pins to power the dev board and other peripherals (look into how rails won't fry things) - Slot for radio communication adapter. - Maybe a breakout of the pins we are going to use.

Layout
```
  ┌───────────┐
  │Main    gps│──────► RADIO
  └───────────┘
   |         └───── STM DISCO if needed
   |
  ┌───────────┐
  │Logic   stm│
  └───────────┘
```

Main data connector
┌Pinout on connector Main<=>Logic connector
│  ┌Sent to mainboard
│  │ ┌Pin on STM
│  │ │     ┌Description
▼  ▼ ▼     ▼
1  x PC6   ┌LEDS: Red
2  x PC7   │LEDS: Blue
3  x PC8   │LEDS: Orange
4  x PC9   └LEDS: Green
5  x BOOTO ─Boot button
6  x NRST  ─Reset button
7  x VDD   ┌Power
8  x GND   └Ground
9  x PB11  ┌I2C2 SCA
10 x PB10  └I2C2 SCL
11 x PA10  ┌USART RX
12 x PA9   └USART TX
13 x PB8   ┌I2C1 SCL
14 x PB9   └I2C1 SDA

Intra-Logic breakout:
┌STM Pins
│           ┌ Description
▼           ▼
PFO-OSC_IN  Crystal oscillator IN
PF1-OSC_OUT Crystal oscillator OUT
VDD1        VDD
VDD2        VDD
VDD3        VDD
VDDA        VDD
VDDIO2      VDD
VBAT        VDD
VSS1        GND
VSS2        GND
VSS3        GND
VSS4        GND
VSSA        GND

SWD Right angle connector TODO: Make sure we hook up the pin that's only on the cool chip
┌STM Pins
│           ┌ Description
▼           ▼