Specifications

Wireless CPU
®
Q24 Series
Interfaces
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This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.
WM_PRJ_Q24NG_PTS_001-004
January 16, 2007
o Otherwise:
- Wireless CPU
®
reset procedure may not perform correctly
- Wireless CPU
®
may be damaged
• If an external hardware reset happens with the ON/~OFF signal set to low, the
Wireless CPU
®
powers OFF
• If an external hardware reset happens with ON/~OFF signal set to high, the
Wireless CPU
®
re-starts
Equivalent circuit
Pin description
Signal Pin number I/O I/O type Description
∼RST
14 I/O Schmitt Reset
Electrical characteristics
Parameters Min Max Condition
VT- 0.9 1 Hysteresis
thresholds
VT+ 1.7 1.8
Reset
state
0 0.4 IOL = -50 μA
∼RST
Normal
mode
2.74 2.86 IOH = 50 μA
This signal may also be used to provide a reset to an external device. It then behaves
as an output. If no external reset is necessary, then this input may be left open.
System
Reset
GND
GND
10nF
GND
Power ON
Reset
2V8
10nF
VT-
VT+
4K7
4K7
~RST
Q24 Series