Specifications

WM_PRJ_Q2501_PTS_001 – 003
March 2004
© 2003 All rights reserved
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Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son
autorisation préalable.
2.9.2.3 Serial links
Signal Pin I/O I/O type Level Comment
GPS Auxiliary Serial Link
GPS_TXD0 4 I CMOS 1.8 V
VIL
≤
0.3 x VCC
VIH
≥
0.7 x VCC
GPS_RXD0 3 O CMOS 1.8 V
VOL
≤
0.1V
VOH
≥
1.6V
GPS Main Serial Link
GPS_TXD2 2 I CMOS 2.8 V
VIL
≤
0.3 x VCC
VIH
≥
0.7 x VCC
GPS_RXD2 1 O CMOS 2.8 V
VOL
≤
0.1V
VOH
≥
2.7 V
GSM Auxiliary Serial Link
GSM_TXD2 38 I CMOS 2.8 V
VIL
≤
0.3 x VCC
VIH
≥
0.7 x VCC
Multiplexed with GPI
GSM_RXD2 40 O CMOS
2.8 V / 3X
tri-state
VOL
≤
0.1V
VOH
≥
2.7 V
Multiplexed with
GPO5
GSM_CTS2 44 O CMOS
2.8 V / 3X
VOL
≤
0.1V
VOH
≥
2.7 V
Multiplexed with
GPIO0
GSM_RTS2 55 I CMOS 2.8 V
VIL
≤
0.3 x VCC
VIH
≥
0.7 x VCC
Multiplexed with
GPIO5
GSM Main Serial Link
GSM_TXD1 59 I CMOS 2.8 V
VIL
≤
0.3 x VCC
VIH
≥
0.7 x VCC
GSM_RXD1 52 O CMOS
2.8 V / 3X
VOL
≤
0.1V
VOH
≥
2.7 V
GSM_CTS1 57 O CMOS
2.8 V / 3X
VOL
≤
0.1V
VOH
≥
2.7 V
GSM_RTS1 50 I CMOS 2.8 V
VIL
≤
0.3 x VCC
VIH
≥
0.7 x VCC
GSM_DSR1 56 O CMOS
2.8 V / 3X
VOL
≤
0.1V
VOH
≥
2.7 V
GSM_DTR1 54 I CMOS 2.8 V
VIL
≤
0.3 x VCC
VIH
≥
0.7 x VCC
GSM_DCD1 71 O CMOS
2.8 V / 2X
VOL
≤
0.1V
VOH
≥
2.7 V
GSM_RI1 74 O CMOS
2.8 V / 2X
VOL
≤
0.1V
VOH
≥
2.7 V
* with VCC= 1.8 V or 2.8 V according to the type of CMOS voltage
**1.7 V for CMOS 1.8 V; 2.7 V for CMOS 2.8 V.
The rising time and falling time of the reception signals (mainly GSM_RTS1)
have to be less than 200 ns.