User`s manual

Configuration and Operation
Operation
User’s Manual M9328MX1ADS - Rev 2
MOTOROLA Configuration and Operation 19
The mixing of external analog audio sources to the converted DAC
signal is supported. These signals can be input at the JP4 and JP5
headers. Additionally the voice out signal from the MX1 is
connected to the AUX1 input of the DAC3350A. This signal is
also amplified and driven to a second headphone connector, P14.
The ADS also provides a microphone connector at P15. This input
is suitable for dynamic microphones only. The microphone input
signal level can be varied by VR74. The conditioned signal is then
fed to the MIP input of the MX1.
Table 2-6 is a list of the audio connectors. All audio jacks are
standard 3.5mm stereo connectors. Table 2-7 through Table 2-9
describe the header pin outs.
Table 2-6 Audio Connectors
Connector Descriptions
P26 Headphone jack for
DAC3350A audio out.
P14 Headphone jack for MX1
Voice Out
P15 Dynamic microphone
input jack
Table 2-7 Audio Header JP3 Signal Descriptions
Pin Mnemonic Signal
1 FINR Filtered op amp output right, line out
2,3 AGND Analog Ground
4 FINL Filtered op amp output left, line out