Specifications

XT55 Hardware Interface Description
Confidential / Preliminary
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mo b i l e
XT55_hd_v00.02 Page 86 of 116 17.03.2004
6.3 Pin description
Please note that the reference voltages listed in Table 27 are the values measured directly
on the XT55 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 is a 80-pin double-row receptacle.
The names and the positions of the pins can be seen from Figure 42 which shows the top
view of XT55.
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_CCDATA
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 GPS_TXDO
GPS_GPIO9
24 57 GPS_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 42: Pin assignment (top view on XT55)