Changes

=== Required Implementation ===

=== Required Implementation ===

1) Use the latest HABEES_STACK_TEMPLATE part from the Altium library. This is to be kept updated by HABEES members to reflect changes in pinout, physical layout, etc, and is required to make your board meet the physical and electrical bare requirements.

#Use the latest HABEES_STACK_TEMPLATE part from the Altium library. This is to be kept updated by HABEES members to reflect changes in pinout, physical layout, etc, and is required to make your board meet the physical and electrical bare requirements.

2) Common Ground all GND nets on the stack connectors to your GND -- this includes two on the Power Bus, four on the Data Bus, and one on the CAN bus.

#Common Ground all GND nets on the stack connectors to your GND -- this includes two on the Power Bus, four on the Data Bus, and one on the CAN bus.

3) For the nets of the power bus that your board is utilizing, make sure to electrically short the nets together, and join them by a 40/50-mil trace. The reason there are two pins is to provide a higher current-limit, so you should tie them together to ensure proper rating.

#For the nets of the power bus that your board is utilizing, make sure to electrically short the nets together, and join them by a 40/50-mil trace. The reason there are two pins is to provide a higher current-limit, so you should tie them together to ensure proper rating.

4) Make sure to '''NOT IMPLEMENT''' any of the following restricted pins, unless specifically agreed upon in advance (don't touch them at all, even as an input) -- 6 (R_MCU), 22 (RX2) 112 (CAN_MODE -- this shouldn't go anywhere except your Transceiver)

#Make sure to '''NOT IMPLEMENT''' any of the following restricted pins, unless specifically agreed upon in advance (don't touch them at all, even as an input) -- 6 (R_MCU), 22 (RX2) 112 (CAN_MODE -- this shouldn't go anywhere except your Transceiver)

5) Make '''SURE TO IMPLEMENT''' the following pins as INPUTS to your MCU -- 7 (R_ALL), 8 (S_READY), 9 (LOW_PWR), 10 (FMODE), 11-14 (System Flags 3-6, reserved), 21 (CHIRP -- should go to a Serial RX pin on your MCU).  

#Make '''SURE TO IMPLEMENT''' the following pins as INPUTS to your MCU -- 7 (R_ALL), 8 (S_READY), 9 (LOW_PWR), 10 (FMODE), 11-14 (System Flags 3-6, reserved), 21 (CHIRP -- should go to a Serial RX pin on your MCU).  

6) Make sure to properly implement the CAN Bus -- duplicate the existing schematic for the primary circuit, and verify that you have properly implemented the terminating impedance sub-circuit.

#Make sure to properly implement the CAN Bus -- duplicate the existing schematic for the primary circuit, and verify that you have properly implemented the terminating impedance sub-circuit.

7) Be sure to connect pin 112 (CAN_SPD) from the data bus to the speed pin on your CAN Transceiver. Without this, it will not function.

#Be sure to connect pin 112 (CAN_SPD) from the data bus to the speed pin on your CAN Transceiver. Without this, it will not function.

8) Be sure to use +3.3_CAN pin from the CAN Bus EXCLUSIVELY to power your Transceiver, and make sure it powers nothing else.

#Be sure to use +3.3_CAN pin from the CAN Bus EXCLUSIVELY to power your Transceiver, and make sure it powers nothing else.

9) Make sure pin 7 (R_ALL) is directly wired to your MCU reset pin, to allow Core Avionics remote reset.  

#Make sure pin 7 (R_ALL) is directly wired to your MCU reset pin, to allow Core Avionics remote reset.  

10) If using RTC, make sure to implement pin 5 (+VBCKP).  

#If using RTC, make sure to implement pin 5 (+VBCKP).  

11) Make sure no component of the board extends more than 0.25" over the board edge.

#Make sure no component of the board extends more than 0.25" over the board edge.

 

=== Self-Help FAQ ===

=== Self-Help FAQ ===