Connectors and Signals
The location of the logic board connectors and a description of the respective
signal names will follow below.
Connector J1
Table 1: Connector J1
Pin
Signal
In/Out Function
1
ATMS
In
Audio To Mobile Station
Sensitivity: 50 mV,
referred to +/-2.3 kHz dev.
Input imp. 10 k
Ω
/ nF
2
PWRSRC In
Power
source
Indicates external power supply
Log. "1": External power supply
Log. "0": Battery
3
LSPCTRL
Out
Loudspeaker control
Handsfree loudspeaker control
Log. "1": Speaker ON
Log. "0": Speaker OFF
4
AGND
Analog ground
Signal ground 0 V
Return lead for pins 5 and 1
SM1341EN/CONJ1.GEM
1 ATMS
2 PWSRC
3 LSPCTRL
4 AGND
5 AFMS
6 SWDC5
7 ICTRL
8 DGND
9 VPPFLASH
10 HOOK
11 DTMS
12 DFMS
13 ONSRQ
14 DCIN
SERVICE: Telephone
4
