Sony Ericsson GR 47 Technical Description page 28

GBBA/SEM/BMS 03:0001 Rev
GR47/GR48 Technical description
The serial channels are used as asynchronous communication links
between an application system or accessory units connected to the
Module. They consist of three UART's.
•
UART 1 – This has full RS232 and is used for all on and off line
communication.
•
UART 2 – May be used for interfacing to a GPS unit,
downloading software, receiving logging information, etc.
•
UART 3 – May be used by embedded applications.
The Dig. 2.75 V CMOS Output / Input electrical characteristics shall
apply, with DGND as the reference. Extra relevant data is specified
for some of the signals.
The character format supported is, 1 start bit, 8 bit data, non-parity
plus 1 stop bit, in total 10 bits per character.
Note : As stated in section 3.2.1 the module is unable to directly
interface to a 3.3V micro processor.
Note 2 : As can be seen from the pin out table, several of the RS232
pins have multiple functionality, this is user selectable with the RS232
functionality set as default.
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