User's Manual

XT55/56 Hardware Interface Description
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XT55/56_hd_v02.06a Page 89 of 125 17.12.2004
6.3 Pin description
Please note that the reference voltages listed in Table 27 are the values measured directly
on the XT55/56 module. They do not apply to the accessories connected.
If an input pin is specified for V
IH
max = 3.3V, be sure never to exceed the stated voltage. The
value 3.3V is an absolute maximum rating.
The Hirose DF12C board-to-board connector on XT55/56 is a 80-pin double-row receptacle.
The names and the positions of the pins can be seen from Figure 40 which shows the top
view of XT55/56.
GPS_VANT 1 80 GSM_EPN2
GPS_VCC_RF
2 79 GSM_EPP2
GPS_VCC 3 78 GSM_EPP1
GPS_VCC 4 77 GSM_EPN1
GSM_RXDDAI
5 76 GSM_MICN2
GSM_TFSDAI
6 75 GSM_MICP2
GSM_SCLK
7 74 GSM_MICP1
GSM_TXDDAI
8 73 GSM_MICN1
GSM_RFSDAI
9 72 GSM_CCVCC
NC
10 71 GSM_CCCLK
NC
11 70 GSM_CCIO
NC 12 69 GSM_CCRST
NC
13 68 GSM_CCIN
NC 14 67 GSM_CCGND
GSM_RTS1
15 66 GSM_IGT
GSM_CTS1 16 65 GSM_EMERGOFF
GSM_RXD1
17 64 GSM_DCD0
GSM_TXD1
18 63 GSM_CTS0
NC 19 62 GSM_DTR0
GPS_GPIO15
20 61 GSM_RTS0
GPS_GPIO14 21 60 GSM_RING0
GPS_GPIO13
22 59 GSM_DSR0
GPS_GPIO10
23 58 GSM_TXDO
GPS_GPIO9
24 57 GSM_RXDO
GPS_GPIO8
25 56 GPS_SDI2
GPS_GPIO7 26 55 GPS_SDO2
GPS_GPIO6 27 54 GSM_CHARGE
GPS_GPIO5
28 53 GSM_POWER
GPS_GPIO4
29 52 GSM_BATT_TEMP
GPS_GPIO3
30 51 GSM_SYNC
GPS_GPIO1
31 50 GSM_BATT+
GPS_GPIO0
32 49 GSM_BATT+
GPS_SDI1
33 48 GSM_BATT+
GPS_SDO1
34 47 GSM_BATT+
GPS_BOOTSEL
35 46 GSM_BATT+
GPS_RFPCO
36 45 GND
GPS_RFPC1 37 44 GND
GPS_M-RST 38 43 GND
GSM_VDD 39 42 GND
GSM_VDDLP 40 41 GND
Figure 40: Pin assignment (top view on XT55/56)