User's Manual

Page 16 of 31
MIC_N 14
Audio input differential signal -
2.2.6.2 The connection between audio I/O and earphone
The audio I/O signals provided by U6100 can be connected to a stereo earphone jack which is shown in Table 2-9. The
information about test points is shown in Table 2-1 above.
Table 2-9 The connection between earphone jack and the board to board connector
Pin name of
earphone jack
Pins of board to board
connector
SN. of 60Pin board to board
connector
Description
Left Speaker EAROP 15
The left output of
stereo
Right Speaker EARON 17
The right output of
stereo
MIC MIC_P 9 The microphone input
PGND GND 14 Analog ground signal
2.2.6.3 The connection between audio I/O and phone handle
The audio I/O signals provided by U6100 can be connected to a phone handle which is shown in Table 2-10.
Table 2-10 The connection between phone handle and the board to board connector
Signals of
phone handle
Pins of
board to board connector
SN. of 60Pin board to
board connector
Description
EAR_P EAROP 15
Audio output differential signal +
EAR_N EARON 17
Audio output differential signal -
MIC_P MIC_P 9
Audio input differential signal +
MIC_N MIC_N 11
Audio input differential signal -
2.2.6.4 Reference circuit
The reference circuit of audio interface is shown in figure 2-10.