Service/Programming - Wavecom GR64 GSM/GPRS Integrator's Manual

5.13 Service/Programming

Pin
58
The SERVICE interface is flash programming enable input. The SERVICE pin is driven
active high by the host application using either a logic control input or applying a dc
voltage (common in legacy applications) to begin a flash download. This pin should
be pulled low or grounded during normal use.
The SERVICE signal drives an N-channel FET switch which has a resistive divider on
the input.
Figure 23: SERVICE Pin Interface
Signal
SERVICE
GR64 Integrators Manual
Page: 68/104
Name Direction
SERVICE Input
Mode
Minimum input voltage
Active High
Maximum input voltage
Inactive Low Maximum input voltage
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Function
Flash programming enable signal
Value Unit
2.5 V
12.0 V
0.8 V