Multiplexed Signal Functions; Software Compatibility - Wavecom GR64 Migration Giude

3.3.2

Multiplexed Signal Functions

The GR4x series multiplexes a number of signals to provide additional feature
support.
example, RS232 handshaking signals are not required in the customers control
interface.
available in GR64. The only difference is that the user needs to select to either use the
pins as RS232 handshaking, or as GPIOs.
The other primary multiplexed interface in GR4x is the Keyboard function. This too is
available in GR64 but the mapping is different because of architectural constraints.
An application note details the method of defining digital GPIO as keyboard
interfaces, offering various keyboard matrix sizes.
Developers that presently use the keyboard feature may need to re-map their existing
interface pins to keypad columns and rows. Please note that the keypad support is
not provided in the GR64 as it was in previous releases.
implement keypad functionality using the available I/O pins. Support services for this
are available upon request.
Details of the multiplexed pin functions can be found in the GR64 Integrators Manual
available upon request from the Wavecom M2M Customer Support.
3.4

Software Compatibility

Legacy users will benefit from having a GR64 product which has been developed to
maintain the largest extent of functional compatibility possible with existing
GR/GM4x products,
enhancements.
It has been a Wavecom M2M primary goal to make the GR64 similar enough to its
predecessor products such that minimal software effort will be required in order to
achieve the same functions and performance when substituted in the user's existing
application.
Some change is inevitable because of core architecture difference. These changes,
and the way in which they impact legacy customers, have been minimized by frequent
reference to the control, response, and behavior of the products that the GR64 is
replacing.
Migration Guide
GR4x to GR64
Page 22 of 28
Many of these multiplexed functions provide optional GPIO where, for
The capability to use GPIO in preference to the control signals is also
as well
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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
as some advanced
GR4x to GR64 Migration Guide
It is still possible to
features and performance