Difference between revisions of "Umarim Lite v2"

Latest revision as of 02:26, 28 August 2013

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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
8 grams (0,3 oz)
53 x 25mm (2.1" x 0.98")
4 layers PCB design / single side SMD components

Umarim Lite v2 3D bottom view
Umarim Lite v2 3D top view
Umarim Lite v2 top side
Umarim Lite v2 bottom side

Pinout

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

**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.

Schematic

Examples of Airborne Equipment Electrical Connections

Small Aircraft Connection Diagram

Large Aircraft Connection Diagram

PCB

Gerber & Drill Files

PCB design Eurocircuits 6-C class compliant:

Download Umarim v2 gerber & drill files (zip)

RS274X, units = Inches, format = 2:5

UmarimLite_v2_SILKSCREEN_TOP.GBR (Top Component Print Layer)
UmarimLite_v2_SOLDERMASK_TOP.GBR (Top Solder Mask)
UmarimLite_v2_SIGNAL_TOP.GBR (Top Copper Layer)
UmarimLite_v2_INTERNAL_PLANE_1.GBR (Internal Copper Layer GND)
UmarimLite_v2_INTERNAL_PLANE_2.GBR (Internal Copper Layer +3.3V)
UmarimLite_v2_SIGNAL_BOTTOM.GBR (Bottom Copper Layer)
UmarimLite_v2_SOLDERMASK_BOTTOM.GBR (Bottom Solder Mask)
UmarimLite_v2_OUTLINE.GBR (Board Outline)
UmarimLite_v2_DRILL.GBR (NC XY coordinates & Drill tools sizes)

Assembly

Components Layout

Umarim Lite v2 bottom components Layout
Umarim Lite v2 top components Layout
Umarim Lite v2 bottom components detail
Umarim Lite v2 top components detail

Bill Of Material

Download Umarim Lite v2 Bill of Material (zipped .xls file)

Qty	Manufacturer part number	Part name / value	Designator	Description	Manufacturer	Package type	Digikey part number	Other distributor
Resistors
2	ERJ-3EKF33R0V	33R	R1,R2	33.0 Ohm 1/10W 1%	Panasonic - ECG	0603	P33.0HCT-ND
1	ERJ-3EKF1000V	100R	R3	100 Ohm 1/10W 1%	Panasonic - ECG	0603	P100HCT-ND
2	ERJ-3EKF3900V	390R	R4,R5	390 Ohm 1/10W 1%	Panasonic - ECG	0603	P390HCT-ND
2	ERJ-3EKF1501V	1.5K	R6,R7	1.50K Ohm 1/10W 1%	Panasonic - ECG	0603	P1.50KHCT-ND
1	ERJ-3EKF1801V	1.8K	R8	1.80K Ohm 1/10W 1%	Panasonic - ECG	0603	P1.80KHCT-ND
4	ERJ-3EKF2201V	2.2k	R9 to R12	2.20K Ohm 1/10W 1%	Panasonic - ECG	0603	P2.20KHCT-ND
1	ERJ-3EKF3301V	3.3K	R13	3.30K Ohm 1/10W 1%	Panasonic - ECG	0603	P3.30KHCT-ND
2	ERJ-3EKF1002V	10K	R14,R15	10.0K Ohm 1/10W 1%	Panasonic - ECG	0603	P10.0KHCT-ND
Capacitors
2	C1608C0G1H180J	18p	C1,C2	Ceramic 18pF 50V C0G 5%	TDK Corp.	0603	445-1272-1-ND
1	C1608X7R1H222K	2.2n/50V	C3	Ceramic 2.2nF 50V X7R 10%	TDK Corp.	0603	445-1309-1-ND
1	C1608X7R1H103K	10n	C4	Ceramic 10nF 50V X7R 10%	TDK Corp.	0603	445-1311-1-ND
17	CC0603KRX7R8BB104	100n	C5 to C21	Ceramic 0.1uF 25V X7R 10%	Yageo	0603	311-1341-1-ND
1	C1608X5R1E105K	1u/25V/X5R	C22	Ceramic 1.0uF 25V X5R10%	TDK Corp.	0603	445-5146-1-ND
1	C1608X5R0J106M	10u/6.3V	C23	Ceramic 10uF 6.3V X5R 20%	TDK Corp.	0603	445-4112-1-ND
2	TAJA336K006RNJ	33u/6.3v	C24,C25	Tantalum 33uF 6.3V 10%	AVX Corp.	A case (EIA 3216-18)	478-1666-1-ND
1	TR3D107K020C0080	100u/20V	C26	Tantalum 100uF 20V 10%	Vishay/Sprague	D case (EIA 7343-31)	718-1774-1-ND
Inductors
1	B82462G4682M	6.8u	L1	1.65A Power Inductor	Epcos Inc.	6.0x6.0 mm	495-1999-1-ND
Semiconductors
1	LPC2148FBD64,151	LPC2148FBD64	IC1	Single-chip ARM7 32-bit microcontroller	NXP Semicond.	LQFP64	568-1765-ND
1	ITG-3200	ITG-3200	IC2	3-Axis Digital-Output Gyroscope	InvenSense	QFN24	N/A	Farnell(#1858279),Sparkfun(#SEN-09793)
1	ADXL345BCCZ-RL	ADXL345	IC3	3-Axis 16 g Digital Accelerometer	Analog Devices Inc.	LGA14	ADXL345BCCZ-RLCT-ND
1	TPS62112RSAT	TPS62112	IC4	17V, 1.5-A, Synchronous Step-Down Converter	Texas Instruments	QFN16	296-19717-1-ND
1	LM3940IMP-3.3/NOPB	LM3940IMP-3.3	IC5	1A low dropout regulator for 5V to 3.3V conversion	National Semicond.	SOT223	LM3940IMP-3.3CT-ND
1	CD4017BPWR	4017	IC6	Decade Counter/Divider with 10 Decoded Outputs	Texas Instruments	TSSOP16	296-14252-1-ND
1	APT1608SURCK	KP-1608SURC	LED1	SMD Chip Red LED Lamp	Kingbright Corp.	0603	754-1123-1-ND
1	APT1608MGC	KP-1608MGC	LED2	SMD Chip Green LED Lamp	Kingbright Corp.	0603	754-1118-1-ND
1	DTA143ZE-TP	DTA143ZE	T1	PNP Pre-Biased Small Signal Transistor	Micro Commercial Co.	SOT523	DTA143ZE-TPMSCT-ND
Connectors
7	53047-0310	SRV0 to 5, RC	J1 to J7	Picoblade 3 pins 1.25mm straight header	Molex Inc.	-	WM1732-ND
1	53047-0410	USB	J8	Picoblade 4 pins 1.25mm straight header	Molex Inc.	-	WM1733-ND
4	53047-0510	UART0-1,I2C0-1	J9 to J12	Picoblade 5 pins 1.25mm straight header	Molex Inc.	-	WM1734-ND
2	53047-0710	SPI1,AUX	J13,J14	Picoblade 7 pins 1.25mm straight header	Molex Inc.	-	WM1736-ND
1	67503-1020	USB_REC	J16	Mini USB Receptacle SMD	Molex Inc.	-	WM5461CT-ND
Other
1	CX5032GB12000H0PESZZ	CX5032GB12000	Q1	CRYSTAL 12.0MHZ 12PF SMD	AVX Corp.	5.0x3.2mm	478-4359-1-ND

PCB and assembled boards suppliers

Check availability on Get Hardware page

Mechanical Dimensions

Paparazzi USB Bootloader Upload

Required components

1 x FTDI TTL-232R-3V3 (Digikey #768-1015-ND) USB to UART converter cable with +3.3V TTL level UART signals. (see Note 1)
2 x 4-pin connector housing Molex Picoblade 51021-0400 (Digikey #WM1722-ND)
5 x crimp terminal female Molex Picoblade 50058-8000 (Digikey #WM1775CT-ND)
1 x 6-pin 0.1" pitch single in line male connector header Samtec TSW-132-07-TS (Digikey #SAM1035-32-ND) or equivalent
28-32AWG wiring cable

Note1: It is advised to use FTDI USB-serial converter, as serial FTDI chips are by default working well in Linux.

The Paparazzi ground station software is configured to look for modems on FTDI ports by default.

This harness can also serve as a modem interface (after it's use in Bootloader uploading) if you plug it on Umarim's UART1 connector

Connection Diagram

Make up a wiring harness similar to the following

Umarim Lite v2 Paparazzi bootloader upload connections

Boot Sequence