Umarim v1.0

...UNDER CONSTRUCTION...
The ENAC team has been working on long endurance airplanes for a while now. It appeared that one of the many limitations was the integration of the electronic part into the new fuselages which are becoming thinner and thinner. So we started to work on a new version of autopilot mainly based on the well-known tiny. The new sensors becoming smaller and smaller, we were able to integrate onto the board the IMU and a new design of barometer. So now, the ENAC team is proud to present you the UMARIM! (which means "I Hope" in turkish)

Hardware Revision History

Version #	Release Date	Release Notes
v1.0	09/2011	Initial release of Umarim

Features

• NXP LPC2148 MCU based
• 1 x Triple axis Digital Gyroscope (Invensense ITG-3200)
• 1 x Triple axis Digital Accelerometer (Analog Devices ADXL345)
• 1 x Digital Baro-altimeter (Freescale MPXA6115 pressure sensor + Texas Instruments ADS1114 16bits ADC/PGA)
• 6 x Servo PWM outputs
• 1 x R/C receiver PPM frame input
• 2 x UART (TTL 3.3V, 5V tolerant)
• 2 x I²C bus
• 1 x SPI bus
• 1 x USB (client)
• 4 x General Purpose I/O or Analog input channels (0V - 3.3V)
• 5v / 1.5A switching power supply (input voltage range 5.5V min → 17.0v max)
• 3.3v / 1A linear regulator
• 2 x status LEDs
• ? grams (?? oz)
• 56 x 25mm (2.2" x 0.98")
• 4 layers PCB design

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  Umarim v1.0 3D bottom view

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  Umarim v1.0 3D top view

Pinout

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

SRV0/1/2/3/6/7

Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+5V	PWR	5V Rail from autopilot	Orange
3	SRVx	OUT	Servo signal (PWM)	White

RC

Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+5v	PWR	5V Rail from autopilot	Orange
3	PPM_IN	IN	PPM Stream from R/C Receiver (5V tolerant)	White

SPI1

Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+3.3V	PWR	3.3V Rail from autopilot	Red
3	SSEL1	IN	SSP Slave Select. Selects the SSP interface as a slave (SSEL1)	Brown
4	MOSI1	I/O	SPI1 Master Out Slave In. Data output from master / data input to slave	Grey
5	MISO1	I/O	SPI1 Master In Slave Out. Data input to master / data output from slave	Green
6	DRDY1	IN	External interrupt 0 input (EINT0)	Purple
7	SCK1	I/O	SPI1 Serial clock. Clock output from master or input to slave	Yellow

AUX

Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+5V	PWR	5V Rail from autopilot	Orange
3	+3.3V	PWR	3.3V Rail from autopilot	Red
4	AUX1	I/O	General Purpose I/O #1 or ADC Input (AD1.5)
5	AUX2	I/O	General Purpose I/O #2 or ADC Input (AD1.4)
6	AUX3	I/O	General Purpose I/O #3 or ADC Input (AD1.3)
7	AUX4	I/O	General Purpose I/O #4 or ADC Input (AD1.2)

UART0

Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+3.3V	PWR	3.3V Rail from autopilot	Red
3	RXD0	IN	UART0 Serial Input (3.3V level, 5V Tolerant)	Green
4	TXD0	OUT	UART0 Serial Output (3.3V level)	Blue

UART1

Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+3.3V	PWR	3.3V Rail from autopilot	Red
3	RXD1	IN	UART1 Serial Input (3.3V level, 5V Tolerant)	Green
4	TXD1	OUT	UART1 Serial Output (3.3V level)	Blue

I2C0

Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+3.3V	PWR	3.3V Rail from autopilot	Red
3	SDA0	Open Drain I/O	I2C0 bus Serial DAta	Brown
4	SCL0	Open Drain I/O	I2C0 bus Serial CLock	Blue

I2C1

Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+3.3V	PWR	3.3V Rail from autopilot	Red
3	SDA1 BOOT	Open Drain I/O	I2C1 bus Serial DAta In-Circuit Serial Programming (ISP) enable (P0.14, +3.3v pullup) (Note)	Brown
4	SCL1	Open Drain I/O	I2C1 bus Serial CLock	Blue

Note: Holding this pin low for at least 3mS after a RESET (or power up) instructs the controller to enter programming mode.

USB

Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	USB+	I/O	USB bidirectional D+ line	Green
3	USB-	I/O	USB bidirectional D- line	White
4	VBUS	IN	Indicates the presence of USB bus power (P0.23) (5V level)	Orange

Schematic

Assembly

Components Layout

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  Umarim v1.0 bottom components Layout

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  Umarim v1.0 top components Layout

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  Umarim v1.0 bottom components detail

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  Umarim v1.0 top components detail