Arduino Connector

Arduino Connector

The default connections for the Arduino Connector are as follows:

  • Serial
    • Pin 6: Serial receive on Arduino, transmit on rMP3
    • Pin 7: Serial transmit on Arduino, receive on rMP3
  • SPI
    • Pin 8: SPI chip select (/CS - active low)
    • Pin 11: SPI MOSI (Master Output, Slave Input)
    • Pin 12: SPI MISO (Master Input, Slave Output)
    • Pin 13: SPI SCK (SPI Clock)

All of these pins have an associated jumper pad just beside the connector which you can use to reroute the signal. You will need to physically cut the jumper between the pads.

You only need to use one of the two interfaces at a time (i.e. serial vs. SPI).


The SPI interface is not available in rMP3 firmware version 100.01.

Rogue Connector 1

Rogue Connector 1

Name Function
+5V 5 Volt Regulated Power Supply
GND Ground
“D”/HBI Multipurpose “D” connection
Hardware Busy Indicator
“C” Multipurpose “C” connection
GND Ground
Tx rMP3 Serial Transmit
Rx rMP3 Serial Receive

Rogue Connector 2

Rogue Connector 2

Name Function
Card Detect Card Detect Signal (active low)
Activity Activity Signal (from Activity LED)
“A” Multipurpose “A” signal (from “A” LED)
“B” Multipurpose “B” signal (from “B” LED)
SCK Slave SPI Serial Clock
MISO Slave SPI MISO (Master Input, Slave Output
MOSI Slave SPI MOSI (Master Output, Slave Input
/CS Slave SPI Chip Select (active low)

FTDI Cable Connector

FTDI Connector

Name Function
GND Ground
-NC- No Connection
+5V 5 Volt Supply from FTDI connector
- to use this supply, JP5 must be jumped
to FTDI Tx Serial transmit on FTDI connector, receive on rMP3
to FTDI Rx Serial receive on FTDI connector, transmit on rMP3
#DTR/#RTS DTR/RTS signal from FTDI connector (active low)

Input Connector

Input Connector

Name Function
+5V 5 Volt Regulated Power Supply
GND Ground
7 Button 7
7 Bit Interface Trigger (active low)
6 Button 6
Bit 6
5 Button 5
Bit 5
4 Button 4
Bit 4
3 Button 3
Bit 3
2 Button 2
Bit 2
1 Button 1
Bit 1
0 Button 0
Bit 0

Line-Out Connector

Name Function
V 5 Volt Regulated Power Supply
R Right audio output (1V p/p, 16 Ohm minimum)
G Ground
L Left audio output (1V p/p, 16 Ohm minimum)

Other Connectors


When JP5 is jumped, the FTDI connector will be used as the power supply for the board.

WARNING JP5 must not be jumped if the FTDI connector is used at the same time as another external supply is connected.


JP6 is used when updating the firmware. The “Manual Update” mode is recommended. This will put the rMP3 into bootloader mode.


The DNU connector is used for manufacturing only.

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rmp3/documentation/connectors.txt · Last modified: 2010/04/08 20:49 by bhagman
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