Hardware; Overview; Gr64; Gs64 - Wavecom Gx64 Application Note

3

Hardware

3.1

Overview

The GR64 and the GS64 send all debug information out via UART2. Wavecom
recommends that customers design their PCBs to allow the second UART to be
populated during the design and development phase so that debug information may
be retrieved when required. Also, debug information may be retrieved from the
second UART output of the UMA or TINA development boards.
3.2

GR64

The GR64 was designed to be as backwards compatible with the Gx4x modules as
possible. One of the major differences between the platforms was the Gx4x had
three UARTs and UART 2 was used for debugging but the Gx64 only has two UARTs.
In the GR64, the pins for the second UART are laid out where the pins for UART 3
were laid out for the GR47 (pins 43 and 44).
3.3

GS64

The GS64 has the debug UART lead out of pins 63 and 64.
3.3.1

Use with the Universal Developers Kit

When using the universal developers kit with the GS64 adaptor boards you should
move the jumpers X501 and X502 to the SEC PORT position, this is due to the
second UART being routed out through the UART2 pins on the GR47 system
connector.
Gx64 APPLICATION NOTE
Using Optitrace
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