User Guide

GM47/48 Design Guidelines
BA/SEM/MSC 02:0006 Rev PA1 19
4.5 EMC
The circuit ground is bonded to the metal chassis of the developers kit
box, all signal connections are filtered via ferrite chokes.
4.6 Data signals:
The data and handshake lines are converted between 2.7V & 5V logic
and then between 5V & RS232 levels. The data signal and handshake
lines into the module are powered from the VIO supply interface which
ensures isolation of the signal when the module is off.
Diodes D3-5,D7 & D8 are not fitted.