Note that connection labels correspond to the identifiers on the Version 1.0 schematics.

Front of Board

JP300

5VDC Power : Requires a regulated 5VDC power supply, positive tip, 3.5mm OD, 1.4mm ID barrel jack (aka a 3.8mm or 4mm connector).

Schematics indicate 2A peak. According to AdaFruit the power draw for the subsystems is roughly:

• 300 mA for the base hardware (processor, RAM, SD card),
• 200 mA for the USB hub (not including power to the USB devices),
• 300 mA for a speaker plugged into the 2W output,
• 500 mA max for charging a Lipoly battery.

P100

Li-poly battery connector : JST B3B-EH-A connector.

If powering from a Li-poly, USB0 will be powered, 1 and 2 will not.
There is a fourth USB connection on the GPIO header which is also powered by the Li-poly boost system. ref

P102

Serial JTAG header - 0.1” male header (DNP)

• Pin 1 : 3.3v
• Pin 2 : DEBUG
• Pin 3 : PSWITCH
• Pin 4 : GND

P104

Rotary Quadrature Encoder (no connector, solder points only)

• Pin 1 : ROTARYA
• Pin 2 : GND
• Pin 3 : ROTARYB

P200

9x2 header : USB, I2C and GPMI

The following signals are available (by pin number)

Bottom Row, Left to Right

• 1 - 5V
• 3 - USBC1 N
• 5 - USBC1 P
• 7 - GND
• 9 - Vid to Ext
• 10 - i2C SCL
• 11 - i2C SDA
• 15 - 3.3V
• 17 - LCD XP
• 19 - LCD YP
• 21 - LCD XM
• 23 - LCD YM
• 25 - HOST TO CP UART

Top Row, Left to Right

• 2 - GPMI D00
• 4 - GPMI D01
• 6 - GPMI D02
• 8 - GPMI D03
• 10 - GPMI D04
• 12 - GPMI D05
• 14 - GPMI D07
• 16 - GPMI D06
• 18 - OSC TO FM
• 20 - PWM2
• 22 - CHUMBY BEND
• 26 - CP TO HOST UART

P400

LRADC1 : Low Resolution Analog to Digital Converter

• Pin 1 : LRADC1 (CPU)
• Pin 2 : connected to pin 39 of P401 (why?)

P401

22x2 Header, LCD Connector

Top Row, Right to Left

• 1 : GND
• 3 : LCD T B1
• 5 : LCD T B3
• 7 : LCD T B5
• 9 : LCD T G0
• 11 : LCD T G2
• 13 : LCD T G4
• 15 : GND
• 17 : LCD T R1
• 19 : LCD T R3
• 21 : LCD T R5
• 23 : LCD VSYNC T
• 25 : LCD DOTCLK
• 27 : LCD ENABLE T
• 29 : LED A
• 31 : LCD WR E
• 33 : LCD CS
• 35 : LINE1 INL
• 37 : GND
• 39 : LRADC1 EXT
• 41 : LCD XP
• 43 : LCD XM

Bottom Row, Right to Left

• 2 : LCD T B0
• 4 : LCD T B2
• 6 : LCD T B4
• 8 : GND
• 10 : LCD T G1
• 12 : LCD T G3
• 14 : LCD T G5
• 16 : LCD T R0
• 18 : LCD T R2
• 20 : LCD T R4
• 22 : P 3.3V
• 24 : LCD HSYNC T
• 26 : GND
• 28 : LCD RESET
• 30 : LED K
• 32 : LCD RS
• 34 : LCD DET
• 36 : LINE1 INR
• 38 : VDDA
• 40 : LRADC0
• 42 : LCD YP
• 44 : LCD YM

P406

PWM2 : Pulse Width Modulation

• Pin 1 : GND
• Pin 2 : PWM2 (CPU)

P500

USB2 : USB Type A Female

P503

USB1 : USB Type A Female (is this really USB4?)

Note that the power to this port (and P500?) is software controlled and may be off at power-up. It can be enabled as explained here.

SW400

DPad switch type EVQQ7. The Data sheet is available. Sample code is available.

• A : GPMI CE0n : BANK2_PIN28
• B : GPMI WPn : BANK0_PIN23
• C : GPMI WRn : BANK0_PIN24
• D : GPMI RDn : BANK0_PIN25
• E : PWM4 : BANK_1_PIN30 (aka CHUMBY BEND)

Accelerometer

A Freescale MMA7455L 3-axis accelerometer with adjustable sensitivity from +-2G to +-8G is accessible over I2C at device address 0x1D.

The Datasheet is available, sample code is available.

Green LEDs

The 4 green LEDs are connected to the following GPIO pins:

• GPMI_D00
• GPMI_D01
• GPMI_D02
• GPMI_D03

Importantly, before any of the LEDs can be used, the transistor on GPMI_RDY0 must be turned on to ground the LEDs.

Sample code is available.