Voltage Reference (Vref) - Wavecom GR64 GSM/GPRS Integrator's Manual

5.6

Voltage Reference (VREF)

Pin
34
GR64 provides a voltage reference interface for user applications.
Level translators are integrated in the GR64 product. The integrated level translators
are referenced to an internal IO regulator on the Wireless CPU side and to an
application voltage on the user side of the interface (VREF).
implementations of VREF, dependent upon the users' GR64 variant;
•
•
Figure 10: Level translator arrangement
The logic interface implementation will differ depending on the Wireless CPU variant
used.
Wireless CPU is used.
GR64 Integrators Manual
Page: 39/104
Name Direction
VREF Input (Output)
VREF as an output (GR64001 variants)
VREF as an input (GR64002 variants)
The table below describes how to design the interface depending on what
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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
Function
Core voltage reference
There are two