Difference between revisions of "Twog v1"

Revision as of 12:57, 3 April 2008

!! WARNING !!

THIS IS A PRELIMINARY DESIGN, IT HAS NOT BEEN TESTED YET.
DO NOT USE FOR MASS PRODUCTION AS LONG AS THIS MESSAGE REMAIN.

Hardware Revision History

Version #	Release Date	Release Notes
v1.00	04/2008	Initial release of Twog v1

Features

Single LPC2148 MCU
8 x Analog input channels 0V - 3.3V (2 channels with optional on-board resistor bridge)
1 x 3.3V TTL UART (5V tolerant)
8 x PWM outputs
1 x R/C receiver PPM frame input
1 x SPI bus
1 x I²C bus
1 x USB (client)
5V/2.5A switching power supply & 3.3V/1A linear regulator
3 x status LEDs with attached test point
?? grams
40.2 x 30.5mm (1.6" x 1.2")
2 layers PCB design, 0603 components

Architecture

Pinout

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

**SERIAL**
Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+5V	PWR	5V Rail from Tiny	Orange
3	+3.3V	PWR	3.3V Rail from Tiny	Red
4	DTR
5	CTS
6	RTS
7	RXD1	IN	UART1 Serial Input (3.3V level, 5V Tolerant)	Green
8	TXD1	OUT	UART1 Serial Output (3.3V level)	Blue

**SPI**
Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+3.3V	PWR	3.3V Rail from Tiny	Red
3	SSEL	IN	SSP Slave Select. Selects the SSP interface as a slave (SSEL1)	Braun
4	MOSI	I/O	SPI1 Master Out Slave In. Data output from master or data input to slave	Grey
5	MISO	I/O	SPI1 Master In Slave Out. Data input to master or data output from slave	Green
6	DRDY	IN	External interrupt 0 input (EINT0)	Purple
7	SCK	I/O	SPI0 Serial clock. Clock output from master or input to slave	Yellow

**PPM**
Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+5v	PWR	5V Rail from Tiny to R/C receiver supply	Orange
3	PPM_IN	IN	PPM Stream from R/C Receiver (5V tolerant)	White
4	SERV_RST	OUT	external PPM decoder reset (Note 1)
5	SERV_CLK	OUT	external PPM decoder clock (Note 1)

Note 1 : Used only if servos are connected to the R/C receiver

**USB**
Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+3.3V	PWR	3.3V Rail from Tiny	Red
3	USB+	I/O	USB bidirectional D+ line	Green
4	USB-	I/O	USB bidirectional D- line	White
5	VBUS	IN	Indicates the presence of USB bus power (P0.23) (5V level)	Orange
6	BUTTON	IN	External Button (+3.3v pullup)
7	LED3	OUT	GPIO (LED #3 command)
8	ADC_7	IN	Analog to Digital Converter Input #7

**IRV**
Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+3.3V	PWR	3.3V Rail from Tiny	Red
3	IRV	IN	Vertical IR Sensor signal (Analog to Digital Converter Input #0)	Purple

**IRH**
Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+3.3V	PWR	3.3V Rail from Tiny	Red
3	IRH_2	IN	Horizontal IR Sensor signal axis 2 (Analog to Digital Converter Input #2)	Grey
4	IRH_1	IN	Horizontal IR Sensor signal axis 1 (Analog to Digital Converter Input #1)	Braun

**ADC1**
Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+5v	PWR	5V Rail from Tiny	Orange
3	+3.3V	PWR	3.3V Rail from Tiny	Red
4	ADC_4	IN	Analog to Digital Converter Input #4
5	ADC_3	IN	Analog to Digital Converter Input #3

**ADC2**
Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+5v	PWR	5V Rail from Tiny	Orange
3	+3.3V	PWR	3.3V Rail from Tiny	Red
4	ADC_6	IN	Analog to Digital Converter Input #6 (Maximum input level can be selected with R12 value)
5	ADC_5	IN	Analog to Digital Converter Input #5 (Maximum input level can be selected with R13 value)

**DOWNLOAD/GPS**
Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+5v	PWR	5V Rail from Tiny	Orange
3	+3.3V	PWR	3.3V Rail from Tiny	Red
4	BOOT	IN	In-Circuit Serial Programming (ISP) enable (P0.14, +3.3v pullup) (Note 2)
5	GPS_RESET	IN	leave unconnected, hold this pin low only for bootloader programming
6	TXD0	OUT	UART0 Serial Output (usable with an external GPS receiver)	Blue
7	RXD0	IN	UART0 Serial Input (usable with an external GPS receiver)	Green

Note 2 : Holding this pin low for at least 3mS after a RESET (or power up) instructs the controller to enter programming mode.

**I2C**
Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+5V	PWR	5V Rail from Tiny	Orange
3	+3.3V	PWR	3.3V Rail from Tiny	Red
4	SDA	I/O	I2C bus Serial DAta
5	SCL	I/O	I2C bus Serial CLock

**CAM**
Pin #	Name	Type	Description	Suggested Color
1	GND	PWR	common ground	Black
2	+5V	PWR	5V Rail from Tiny	Orange
3	+3.3V	PWR	3.3V Rail from Tiny	Red
4	CAM_SW	OUT	video source/payload selection signal
5	SRV_1	OUT	Servo PWM signal #1
6	SRV_5	OUT	Servo PWM signal #5
7	AUX	PWR	video/payload switchable 5V power suply

Schematic

PCB

PCB top copper
PCB bottom copper

Gerber & Drill Files

Download Twog v1.00 gerber & drill files (zip)

RS274X, units = Inches, format = 2:5

Twog_v1-00.GTO (Top Component Print Layer)
Twog_v1-00.GTS (Top Solder Mask)
Twog_v1-00.GTL (Top Copper Layer)
Twog_v1-00.GBL (Bottom Copper Layer)
Twog_v1-00.GBS (Bottom Solder Mask)
Twog_v1-00.DRI (NC XY coordinates & Drill tools sizes)

Possible PCB Manufacturers

Assembly

Components Layout

Top components Layout
Bottom components Layout
Top components details
Bottom components details

Bill Of Material

Download Twog v1.00 Bill Of Material (zipped .xls file)

Qty	Manufacturer part #	Schematic part name / value	Designator	Description	Manufacturer	Package	Optional	Digikey.com
Resistors
2	ERJ-3EKF33R0V	33	R21, R22	1/16W, 5%	Panasonic	0603		P33HCT-ND
1	ERJ-3EKF1000V	100	R24	1/16W, 5%	Panasonic	0603		P100HCT-ND
1	ERJ-3EKF3300V	330	R4	1/16W, 5%	Panasonic	0603		P330HCT-ND
3	ERJ-3EKF1001V	1K	R16, R17, R23	1/16W, 5%	Panasonic	0603		P1.00KHCT-ND
3	ERJ-3EKF1501V	1.5K	R2, R19, R20	1/16W, 5%	Panasoni	0603		P1.50KHCT-ND
2	ERJ-3EKF1801V	1.8k (see note1)	R13,R18	1/16W, 5%	Panasonic	0603		P1.8KHCT-ND
3	ERJ-3EKF3301V	3.3K	R3, R14, R15	1/16W, 5%	Panasonic	0603		P3.3KHCT-ND
7	ERJ-3EKF1002V	10K	R1, R6 to R11	1/16W, 5%	Panasonic	0603		P10.0KHCT-ND
1	ERJ-3EKF1502V	15K (see note2)	R12	1/16W, 5%	Panasonic	0603		P15.0KHCT-ND
Capacitors
4	C0603C180J5GAC	18pF	C26 to C29	50V, 5%	Kemet	0603		399-1052-1-ND
18	C0603C104K5RAC	100nF	C2,C3,C5 to C20	50V, 10%	Kemet	0603		399-5089-1-ND
2	T520A336M006ATE070	33uF/6V	C24, C25	SMD tantalum capacitor	Kemet	A case (EIA 3216-18)		399-4719-1-ND
2	TAJD107K020R	100uF/20V	C1, C21	SMD tantalum capacitor	AVX Corp.	D case (EIA 7343-31)		478-1724-1-ND
Semiconductors
1	LM3940IMP-3.3	LM3940IMP-3.3	IC3	1A low dropout regulator for 5V to 3.3V conversion	National Semic.	SOT223		LM3940IMP-3.3CT-ND
1	TPS2051BDBV	TPS2051B	IC4	Current Limited Power Distribution Switch	Texas Instr.	SOT23-5	yes	296-21265-1-ND
1	LPC2148FBD64	LPC2148FBD64	IC5	Single-chip ARM7 32-bit microcontroller	NXP	LQFP64		568-1765-ND
1	CD4017BPW	4017	IC6	Decade Counter/Divider with 10 Decoded Outputs	Texas Instr.	TSSOP16		296-14252-1-ND
1	APT1608SURCK	KP-1608SURC	LED1	SMD Chip Red LED Lamp	Kingbright	0603	yes	754-1123-1-ND
1	APT1608MGC	KP-1608MGC	LED2	SMD Chip Green LED Lamp	Kingbright	0603		754-1118-1-ND
1	APT1608SYCK	KP-1608SYC	LED3	SMD Chip Yellow LED Lamp	Kingbright	0603	yes	754-1124-1-ND
1	BC807-40	BC807	T1	PNP general purpose transistor	NXP	SOT23		568-1629-1-ND
Modules
1	PTH08080WAH	PTH_08080W	IC1	2.25A Wide-input adjustable switching regulator	Texas Instr.	specific		296-20432-ND
Connectors
7	53047-0310	SRV0, SRV4, SRV2, SRV6, IRV, SRV3, SRV7	J12 to J18	Picoblade 3 pins 1.25mm straight header	Molex	specific		WM1732-ND
1	53047-0410	IRH	J11	Picoblade 4 pins 1.25mm straight header	Molex	specific		WM1733-ND
4	53047-0510	PPM,I2C,ADC2,ADC1	J4, J6, J8, J10	Picoblade 5 pins 1.25mm straight header	Molex	specific	J6,J8,J10	WM1734-ND
3	53047-0710	SPI,CAM,DOWNLOAD	J3, J5, J7	Picoblade 7 pins 1.25mm straight header	Molex	specific	J3,J5	WM1736-ND
2	53047-0810	SERIAL,USB	J2, J9	Picoblade 8 pins 1.25mm straight header	Molex	specific		WM1737-ND
Other
1	405C35B12M00000	CTS405 12MHz	Q1	SMD 12MHz Quartz Crystal	CTS	specific		CTX639CT-ND

@@ Line 38: / Line 38: @@
 == Architecture ==
-under construction
+[[Image:Twog_v1_architecture.png]]
 == Pinout ==