CPF Internal Sensor (DIO) Board
MBARI Drawing# ________________
Design Notes
Chad Kecy
02-13-2019

Requirements:
See Statement of Work from Gene Massion

Decided to remove the ELMO (VL) connection (covered by Ed's board) 02-13-2019
Decided to move the Bluetooth module to a separate new board due to UART issues. 02-12-2019
Pinouts & cables to sensors can be changed to optimize the connector selection on the board. 02-11-2019


GPS
Manufacturer: MikroElectronika
Manufacturer PN#: GNSS 5 Click
Voltage: 5V
Current: Imax=67mA
Current limit set: 1.25A
Comms: i2c
GPIO needed: (2) On/Off Control and Fault Indication


Position Sensor
Manufacturer: Linear Technology
Manufacturer PN#: LTC 956A
Voltage: 12V
Current: < 10mA
Current limit set: 1.25A
Comms: i2c
GPIO needed: (2) On/Off Control and Fault Indication


Spare i2c Ports (1-3):
Manufacturer: None specified
Manufacturer PN#: None specified
Voltage: 5V or 12V (Selectable)
Current: TBD
Current limit set: 1.25A
Comms: i2c
GPIO needed: (2,2,2) On/Off Control and Fault Indication


Motorized Valve:
Manufacturer: Maxon
Manufacturer PN#: 221024
Voltage: 12V
Current: NoLoad=20mA, Nominal=0.773A, Stall=2.23A
Current limit set: 1.25A
Comms: none
GPIO needed: (5) On/Off Control, Fault Indication, Open Command, Open Status, Ready Status


PTH Sensor (onboard)
Manufacturer: Bosch
Manufacturer PN#: BME280
Voltage 3.3V
Current: < 1mA
Current limit set: N/A
Comms: i2c
GPIO needed: (1) On/Off Control


Spare GPIO Port
Voltage: none
Current: none
Current limit set: none
GPIO needed: Any spare GPIO lines from main bus (5 spare lines available)


Items to Resolve
Maximum number of addresses available on i2c bus?
Pull-ups on i2c bus? - No, PU's are on motherboard. Verify.
Fuses?
Test Points and/or Test Connector? - Adding some TP's. All GPIO lines?