User's Manual

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User Manual 2012/06/28
4. UNUSED PINS POLICY
The table below defines the connection requirement of unused pins, as well as mandatory connections.
LGA Pin Signal Name
Connection when not used / Mandatory
connection
1-3 GND
0V
4 RF_GSM
GSM Antenna
5-8 GND
0V
9
RESERVED
(3G compatibility)
Left Open
10 GND
0V
11 RF_GPS
GPS Antenna
12 GND
0V
13 PPS
Left Open
14 UART1_DTR
Loop to UART1_DSR
15 UART1_DSR
Loop to UART1_DTR
16 UART1_CTS
Loop to UART1_RTS
17 UART1_RX
UART1_RX
18 UART0_TX
Left Open
19 UART0_RTS
Loop to UART0_CTS
20
RESERVED
(3G compatibility)
Left Open
21 PCM_CLK
Left Open
22 PCM_SYNC
Left Open
23 HSET_N
Left Open
24 HSET_P
Left Open
25 MIC_P
Left Open
26 MIC_N
Left Open
27 RESET
Left Open
28 VBACKUP
C=10µF
29 VBAT
VBAT
30 ADC1
Left Open
31 ADC0
Left Open
32 POK_IN
POWER ON
33 SIM_VCC
SIM VCC (external SIM)
Left Open (if embedded SIM, and no plan to
support external SIM)
34 SIM_DATA
SIM DATA (external SIM)
Left Open (if embedded SIM, and no plan to
support external SIM)
35 SIM_CLK
SIM CLK (external SIM)
Left Open (if embedded SIM, and no plan to
support external SIM)
36
GPIO1
Left Open
37
SPI_IRQ
Left Open
38
RESERVED
(futur use) Left Open
39
GPS_EXT_LNA_EN
Left Open
40
GPIO2
Left Open