User Manual

GM47/48 Technical description

BA/SEM/MS 02:0004 Rev B

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. One of them, the first and

main one, shall have RS-232 functionality. The rest shall behave as

general- purpose serial data lines, except for special applications (such

as accessories for the UART2 and Bluetooth for UART 3).

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 only character format supported is 1 start bit, 8 bit data, non-

parity plus 1 stop bit, in total 10 bits per character.