Umarim v1.0

...UNDER CONSTRUCTION...

Hardware Revision History

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

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 min 5.4V@1.5A → max 17v)
3.3v / 1A linear regulator
2 x status LEDs
? grams (?? oz)
56 x 25mm (2.2" x 0.98")
4 layers PCB design

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	I/O (Open Drain)	I2C0 bus Serial DAta	Brown
4	SCL0	I/O (Open Drain)	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	I/O (Open Drain)	I2C1 bus Serial DAta In-Circuit Serial Programming (ISP) enable (P0.14, +3.3v pullup) (Note)	Brown
4	SCL1	I/O (Open Drain)	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