Specifications

WM_PRJ_Q2501_PTS_001 – 003
March 2004
© 2003 All rights reserved
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2.9.9 GPS activation
Signal Pin I/O I/O type Level Comment
GPS_EN 21 I/O CMOS
2.8 V / 2X
VIL
≤
0.3 VCC*
VIH
≥
0.7 VCC*
VOL
≤
0.1V
VOH
≥
2.7 V
Output: 100 k
Ω
impedance
*VCC = 2.8 V
2.9.10 GSM transmission activity status
Signal Pin I/O I/O type Level Comment
GSM_PAC_EN 20 O CMOS
2.8 V / 3X
Tri-state
VOL
≤
0.1V
VOH
≥
2.7 V
This signal is also
used internally.
Misuse can
degrade GSM
performances.