Relay/Ttl - AVT MAGIC AE1 DAB+ Hardware & Software Manual

W i n d o w s P C S o f t w a r e
P A GE 5 0
5.5.2.1.6

Relay/TTL

The MAGIC AE1 DAB+ system incorporates six GPIO Pins (TTL) which can be
programmed separately as input or output. Additionally, two Relays are
available.
The operating mode of a TTL Pin - Input or Output is selected via the option
Direction.
The following specification accounts for all three configuration windows
TTL1 ... TTL6.
TTL Pin as input
FIG. 28
If you use a TTL Pin as Input, you can program two different functions sepa-
rately when edges change:
• Positive edge: The event is activated when the voltage on the TTL Pin
changes from 0V to +3,3V.
• Negative edge: The event is activated when the voltage on the TTL Pin
changes from +3,3V to 0V.
The following functions can be configured (Function Code):
– -: No function, the negative edge is not used.
– Connect:
Via this function you can establish a connection.
– Connect (level triggered):
Same function as Connect, but the event is activated level triggered
and not edge triggered.
– Disconnect: If you activate this function, a connection can be discon-
nected.
TTL PIN AS INPUT