User's Manual

GC864 Hardware User Guide
1vv0300733 Rev. 0 - 12/06/06
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Right reserved page 19 of 68
5 GC864 pins allocation
The GC864 uses an 80 pin Molex p.n. 53949-0878 male connector for the connections with the external
applications. This connector matches the 54150-0878 model
.
Pin Signal I/O Function Internal
Pull up
Type
Power Supply
1 VBATT - Main power supply Power
2 VBATT - Main power supply Power
3 VBATT - Main power supply Power
4 VBATT - Main power supply Power
5 GND - Ground Power
6 GND - Ground Power
7 GND - Ground Power
Audio
8 AXE I Handsfree switching
100K
Ω
CMOS 2.8V
9 EAR_HF+ AO Handsfree ear output, phase + Audio
10 EAR_HF- AO Handsfree ear output, phase - Audio
11 EAR_MT+ AO Handset earphone signal output, phase + Audio
12 EAR_MT- AO Handset earphone signal output, phase - Audio
13 MIC_HF+ AI Handsfree microphone input; phase +, nominal level 3mVrms Audio
14 MIC_HF- AI Handsfree microphone input; phase -, nominal level 3mVrms Audio
15 MIC_MT+ AI Handset microphone signal input; phase+, nominal level 50mVrms Audio
16 MIC_MT- AI Handset microphone signal input; phase-, nominal level 50mVrms Audio
SIM Card Interface
18 SIMVCC - External SIM signal – Power supply for the SIM 1.8/3V
19 SIMRST O External SIM signal – Reset 1.8/3V
20 SIMIO I/O External SIM signal - Data I/O 1.8/3V
21 SIMIN I External SIM signal - Presence (active low)
47K
Ω
1.8/3V
22 SIMCLK O External SIM signal – Clock 1.8/3V
Trace
23 RX_TRACE I RX Data for debug monitor CMOS 2.8V
24 TX_TRACE O TX Data for debug monitor CMOS 2.8V
Prog. / Data + Hw Flow Control
25 C103/TXD I Serial data input (TXD) from DTE CMOS 2.8V
26 C104/RXD O Serial data output to DTE CMOS 2.8V