Umarim Lite v2

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Umarim Lite v2 bottom side


Hardware Revision History

Version # Release Date Release Notes
v2 07/2012 Minor PCB modifications
v1 03/2012 Initial release of Umarim Lite


Features

  • NXP LPC2148 MCU based
  • 1 x Triple axis Digital Gyroscope (Invensense ITG-3200)
  • 1 x Triple axis Digital Accelerometer (Analog Devices ADXL345)
  • 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 (0,?? oz)
  • 53 x 25mm (2.1" x 0.98")
  • 4 layers PCB design / single side SMD components

Pinout

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

UmarimLite v2 pinout.png


SRV0/1/2/3/4/5
Pin # Name Type Description Color
1 GND PWR common ground Black
2 +5V PWR 5V Rail from autopilot Orange
3 SRVx OUT Servo signal (PWM) White


R/C
Pin # Name Type Description 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 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 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 ADC_0 (lpc AD1.5)
5 AUX2 I/O General Purpose I/O #2 or ADC Input ADC_1 (lpc AD1.4)
6 AUX3 I/O General Purpose I/O #3 or ADC Input ADC_2 (lpc AD1.3)
7 AUX4 I/O General Purpose I/O #4 or ADC Input ADC_3 (lpc AD1.2)


UART0
Pin # Name Type Description 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 RXD0 IN UART0 Serial Input (3.3V level, 5V Tolerant) Green
5 TXD0 OUT UART0 Serial Output (3.3V level) Blue


UART1
Pin # Name Type Description 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 RXD1 IN UART1 Serial Input (3.3V level, 5V Tolerant) Green
5 TXD1 OUT UART1 Serial Output (3.3V level) Blue


I2C0
Pin # Name Type Description 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 SDA0 Open Drain
I/O
I2C0 bus Serial DAta Brown
5 SCL0 Open Drain
I/O
I2C0 bus Serial CLock Blue


I2C1
Pin # Name Type Description 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 SDA1
BOOT
Open Drain
I/O
I2C1 bus Serial DAta
In-Circuit Serial Programming (ISP) enable (P0.14, +3.3v pullup) (Note)
Brown
5 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 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

Note: MiniUSB and Molex USB connectors are in parallel, only one can be connected at a time.