Chimera/v1.00

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Hardware Revision History

Version #	Release Date	Release Notes
v1.00	10/2016	Initial release of Chimera

Pinout

Pins Name and Type are specified with respect to the Autopilot Board

General Pinout

Pinout Tables

UART1 (Companion)

Pin #	Name	Type	MCU Port	Description
1	GND	PWR	-	common ground
2	+5V Comp.	PWR	Controlled by PC4	5V/3A specific for Companion board (PC4 = LOW => ON (default, pulldown) / PC4 = High => OFF)
3	+3.3V	PWR	-	3.3V Rail from autopilot
4	RX1	IN	PB7	UART1 Serial Input (3.3V level, 5V tolerant)
5	TX1	OUT	PB6	UART1 Serial Output (3.3V level)

UART2

Pin #	Name	Type	MCU Port	Description
1	GND	PWR	-	common ground
2	+5V	PWR	-	5V Rail from autopilot
3	+3.3V	PWR	-	3.3V Rail from autopilot
4	RX2	IN	PD6	UART2 Serial Input (3.3V level, 5V tolerant)
5	TX2	OUT	PD5	UART2 Serial Output (3.3V level)
6	RTS2	OUT	PD4	UART2 Flow Control Request to Send (3.3V level)
7	CTS2	IN	PD3	UART2 Flow Control Clear to Send (3.3V level, 5V tolerant)

UART3 (Modem)

Pin #	Name	Type	MCU Port	Description
1	GND	PWR	-	common ground
2	+5V	PWR	-	5V Rail from autopilot
3	+3.3V	PWR	-	3.3V Rail from autopilot
4	RX3	IN	PD9	UART3 Serial Input (3.3V level, 5V tolerant) DO NOT USE if XBee module present on Chimera
5	TX3	OUT	PD8	UART3 Serial Output (3.3V level) DO NOT USE if XBee module present on Chimera

UART8 (GPS Receiver)

Pin #	Name	Type	MCU Port	Description
1	GND	PWR	-	common ground
2	+5V	PWR	-	5V Rail from autopilot
3	+3.3V	PWR	-	3.3V Rail from autopilot
4	RX8	IN	PE0	UART8 Serial Input (3.3V level, 5V tolerant)
5	TX8	OUT	PE1	UART8 Serial Output (3.3V level)

I2C2 (3V3)

Pin #	Name	Type	MCU Port	Description
1	GND	PWR	-	common ground
2	+5V	PWR	-	5V Rail from autopilot
3	+3.3V	PWR	-	3.3V Rail from autopilot
4	SDA2	Open Drain I/O	PB11	I2C2 bus Serial DAta (3.3V level, 1.5k pull-up)
5	SCL2	Open Drain I/O	PB10	I2C12 bus Serial CLock (3.3V level, 1.5k pull-up)

Note: 2 x Molex Picoblade and 2 x 0.1" Header are all in parallel

I2C2 (5V)

Pin #	Name	Type	MCU Port	Description
1	GND	PWR	-	common ground
2	+5V	PWR	-	5V Rail from autopilot
3	+3.3V	PWR	-	3.3V Rail from autopilot
4	SDA2	Open Drain I/O	PB11	I2C2 bus Serial DAta (5V level, 3.3k pull-up)
5	SCL2	Open Drain I/O	PB10	I2C12 bus Serial CLock (5V level, 3.3k pull-up)

SPI1

Pin #	Name	Type	MCU Port	Description
1	GND	PWR	-	common ground
2	+5V	PWR	-	5V Rail from autopilot
3	+3.3V	PWR	-	3.3V Rail from autopilot
4	NSS1	OUT	PA15	Slave Select. Selects the SPI slave
5	MOSI1	I/O	PB5	SPI1 Master Out Slave In. Data output from master / data input to slave
6	MISO1	I/O	PB4	SPI1 Master In Slave Out. Data input to master / data output from slave
7	SCK1	I/O	PB3	SPI1 Serial clock. Clock output from master or input to slave

CAN

Pin #	Name	Type	MCU Port	Description
1	GND	PWR	-	common ground
2	+5V	PWR	-	5V Rail from autopilot
3	CANH	I/O	-	CAN bidirectional + line
4	CANL	I/O	-	CAN bidirectional - line

Note: Embedded 120R terminator resistor.

USB

Pin #	Name	Type	MCU Port	Description
1	GND	PWR	-	common ground
2	USB+	I/O	PA12	USB bidirectional D+ line
3	USB-	I/O	PA11	USB bidirectional D- line
4	VBUS	IN	PA9	Indicates the presence of USB bus power (5V level), DFU or USB storage Mode selection (BOOT0 MCU pin)

Note: MicroUSB, Molex Picoblade and 0.1" Header USB connectors are in parallel, only one can be connected at a time.

SWD (Serial Wire debug)

Pin #	Name	Type	MCU Port	Description
1	+3.3V	PWR	-	3.3V Rail from autopilot
2	SWCLK	IN	PA14	SWD Serial Clock
3	GND	PWR	-	common ground
4	SWDIO	I/O	PA13	SWD Serial Data
5	RST	IN	NRST	MCU Reset

Pin to pin compatible with STM ST-LINK/V2 debug tool connector

Assembly

PCB and assembled boards suppliers

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