GR4x to GR64 Migration Guide
3.2.2
Charging Input
Pin
GR64
GR4x
Functional Difference
11 CHG_IN
CHG_IN
Input
range,
current limit, charge behavior
GR4x provisioned for a 5V, 600mA charging input. The GR64 has provisions for a
6.3V max, 500mA max charging source. The respective charging processes employ
different mechanisms. For a full description of the CHG_IN, users should refer to a
comprehensive description, and circuit implementation proposal in the GR64
Integrators Manual, available upon request from the Wavecom M2M Customer
Support.
Change Impact: This change should have negligible impact on existing integrators.
3.2.3
SIM voltage
Pin
GR64
GR4x
Functional Difference
15
SIMVCC
SIMVCC Support for SIM technology
The GR64 supports only 1.8V and 3.0V SIM cards. It does not provide support for the
5.0V SIM cards, which became obsolete some years ago.
Change Impact: This change will not impact existing integrators.
3.2.4
D to A Converter
Pin
GR64
GR4x
Functional Difference
20
DAC
DAC
Software vs Hardware implementation
The signal from the GR64 to the DAC output is a programmable Pulse Width
Modulated (PWM) signal. Although this is not a hardware DAC like the predecessor
interface (which produced a true analogue voltage output) it can be easily adapted
with simple analogue filter circuitry to emulate a DAC function. An example can be
found in the GR64 Integrators Manual, available upon request from the Wavecom
M2M Customer Support.
Change Impact: This will require some programming and a simple circuit
implementation on the host application.
Migration Guide
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior written agreement.
Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable
GR4x to GR64
Page 17 of 28
