GR47/48 Design Guidelines
BA/SEM/MS 03:0015 Rev A
LZT 123 7596
22
4.5 EMC
When using the original developers kit (type number 4000005) the
circuit ground is bonded to the metal chassis of the developers kit box,
all signal connections are filtered via ferrite
chokes.
The new developers kit (type number 4000006) has reduced protection
but is enough to pass all EMC testing.
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.
For the original developers kit diodes D3-5,D7 & D8 are not fitted.
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