Symphony SoundBite Reference Manual, Rev. 2.0
8
Freescale Semiconductor
Configuration and Connections
NOTE
If you use the J1 jack for analog audio input, no jumpers should be present
on JP1, or the input source and the microphone preamplifier output will
contend with each other.
3.5
General Purpose Switches: SW1
DIP switches (SW1) are provided for general purpose use by the application code running in the DSP. The
GPIO pins connected to SW1 should normally be configured to be GPIO inputs.
•
In the ON state, the corresponding DSP GPIO line is pulled high and a logic high is presented to
the input.
•
In the OFF state, the internal pulldown resistor presents a logic low to the input.
3.6
General Purpose LEDs: LED1–9
Nine LEDs are provided for general purpose use by DSP application code. The GPIO pins connected to
the LEDs should normally be configured as GPIO outputs.
•
A logic high output on one of these GPIO pins turns ON the corresponding LED
•
A logic low output on one of these GPIO pins turns OFF the corresponding LED.
Table 4
shows the schematic signal name and DSP GPIO pin that corresponds to each LED identifier.
Table 3. JP1 Jumper Selects Left/Right Input Channel
Jumper
1-2
Connects the microphone output to the left input channel of U5.
3-4
Connects the microphone output to the right input channel of U5.
Table 4. General Purpose LEDs
LED
Color
Schematic
DSP Pin
D1
Green
GPLED0
PF7
D2
Green
GPLED1
PF8
D3
Green
GPLED2
PF9
D4
Green
GPLED3
PF10
D5
Amber
GPLED4
TIO0/PB0
D6
Amber
GPLED5
TIO1/PB1
D7
Red
GPLED6
PC2
D8
Red
GPLED7
PC5
D9
Red
GPLED8
PC6
