Gateway Elf Pin usage 2 June 2016
Pin usage Information from Brent email of 10 May 2016

PWM channels for setting current limits on circuit breakers
these contorl current limit of bus voltage
0% (low) = 5A
100% (high) = 0A
Core Raw TIM3_CH1  on  PC6
AM1 TIM3_CH2  on  PC7
AM2 TIM3_CH3  on  PC8
AM3 TIM3_CH4  on  PC9
Main TIM9_CH1  on  PB13
Turbine Raw TIM9_CH2  on  PB14

Digital Inputs indicating the state of the breaker
These indicate state of Bus voltage to the device
High = MOSFET fully on
Low = MOSFET Limiting
Main PE7
Turbine Raw PE8
Core Raw PE9
AM1 PE10
AM2 PE11
AM3 PE12             

Digital outputs to control circuit breakers to the Core, Turbine
These control Logic power
Low = Breaker On
high = Breaker Off
Core Logic PE13
Turbine Logic PE14

Digital Outputs that Turn the breaker off and put it in a low power state 
These all control Raw Bus Voltage
High = Breaker on
Low = Breaker off, low power state
Main PD0
Turbine Raw PD1
Core Raw PD2
AM1 PD3
AM2 PD4
AM3 PD5

Digital inputs that indicate state of each circuit breaker output 
These indicate state of logic power
Low = Transistor is in saturation, on
High = Out of saturation, off
Core Logic PD6
Turbine Logic PD7

Digital inputs that indicate if a circuit breaker has faulted 
These indicate fault on the Bus voltage
Low = Output is turning off or has turned off due to high voltage or Current
High = normal
Main PD10
Turbine Raw PD11
Core Raw PD12
AM1 PD13
AM2 PD14
AM3 PD15

Turbine I2C SCK  on  PB10  and  PA1
Turbine I2C SDA  on  PB11  and  PA0
Core I2C SCK on PB8 and PB6
Core I2C SDA on PB9 and PE0

Digital output to source Turbine and Core Elf motor synchronization lines (this will generate your 20kHz signal)
Core Sync TIM10_CH1 on PB12

Digital Output connected to the wakeup pin on all cartridge elfs
Turbine Wake up TIM11_CH1  on PB15


Analog inputs for environmental sensors
Pressure PA4 0.33V = 0psia 3.0V = 30psia
Humidty PA5  VOUT=(VSUPPLY)(0.00636(sensor RH) + 0.1515), typical at 25C
Temperature PA6 VOut= (+6.25 mV/°C × T °C) + 424 mV 
Water PA7 No water = 0 V, shorted = 3.3V
Platform Voltage PC4   3V = 30V
Platform Current PC5   3V = 5A

Digital outputs for I2C accelerator enables
high is enable
low is low power state
Core I2C PB7
Turbine I2C PE15

Command port UART lines
USART1_TX  on PA9
USART1_RX on PA10
USART1_CTS on PA11
USART1_RTS on PA12
                  
Turbine Cartridge Processing Position excitation 
High = LED on
Low = LED off                                                  
TCPPexcitaiton PE1      
                
Digital Input indicating ambient light
High = Light sensed
Low = Dark
LightSense PC10                                            

Digital Output to control 5V power supply
High = On
Low = Off
5V Shutdown PC11 

GPIO to the connector for off-board UARTs
PE3  UART Channel 6
PE4  UART Channel 7
PE5  UART Channel 8