GR4x to GR64 Migration Guide
2.2.6
SIM Interface
The GR64 has support for 1.8V and 3.0V SIM cards, unlike the predecessor series
which supported 3.0V and 5.0V SIMs.
The integrated SIM variant GR64 also has the capability to support more than one SIM.
For this GR64 variant a secondary interface is available through the systems
connector. SIM detection in each holder signals the presence of SIM cards to the
GR64 which is able to selectively switch between SIMs.
Switching between Internal and External SIM holders is done by using the AT
command AT*ESSE. The Wireless CPU will not switch active SIM automatically when a
SIM card is removed or inserted, but it will detect the availability automatically.
2.2.7
DAC Interface
A hardware D to A converter was available to users in the GM/GR4x products. The
GR64 does not possess a hardware DAC, instead a programmable PWM signal is
available which can be used to create a DAC-like function on the host application.
2.2.8
ADC Interface
The A to D converter in the GR64 has a higher resolution (10-bit) compared with its
predecessor device (8-bit), and a different input range.
2.2.9
SPI
The GR64 no longer supports SPI as predecessors like the GR47 did.
2.2.10
Sleep Mode
Sleep mode functionality differs between GR64 and its predecessor products. For the
GR64, the customer must implement a mechanism to take advantage of the Sleep
Mode low current mode, whereas doing so was not necessary for predecessors
including the GR47.
For complete information regarding the Sleep Mode functionality of the GR64, please
refer to the GR64 Application Note entitled “UART Sleep Protocols”, available for
download on the Wavecom Web site.
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
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