
Pluto User Manual A4
www.diamondsystems.com
Page
21
4.2 USB1-USB4 (USB1, USB2)
Connectors USB1 and USB2 each provide access to two of
Pluto’s four USB 2.0 compatible interface ports. The
two connectors have identical pinouts.
4.3 Audio (AUDIO1)
Connector AUDIO1 provides access to
Pluto’s AC’97 stereo audio input and output signals.
4.4 Digital I/O (DIO1)
Connector DIO1 provides eight digital inputs and eight digital outputs. DIO1
’s digital inputs and outputs provide
5V CMOS logic levels. The I/O read (data input) address is 0x200, while the I/O write (data output) address is
0x208. DIO1 pins 19 and 20 can supply up to 1A each of +5V and +12V DC power for use by external circuitry
connected to this port.
+5V
1
2
+5V
USBD-
3
4
USBD-
USBD+
5
6
USBD+
GND
7
8
GND
GND
9
10 Key
Line in, left
1
2
Line in, right
GND
3
4
GND
Mic input
5
6
(unused)
GND
7
8
GND
Speaker out, left
9
10 Speaker out, right
DO0
1
2
DO1
DO2
3
4
DO3
DO4
5
6
DO5
DO6
7
8
DO7
GND
9
10 GND
DI0
11 12 DI1
DI2
13 14 DI3
DI4
15 16 DI5
DI6
17 18 DI7
+5V
19 20 +12V