AVT MAGIC AD1 ETI, Hardware Manual

Page: 39 / 106

PAGE 39
W i n d o w s P C S o f t w a r e
TTL Pin as Output
FIG. 17 TTL PIN AS OUTPUT
If a TTL Pin is configured as an
Output
, the event is signalled when the volt-
age at the TTL Pin changes from 0V to +3.3V.
Under
Positive edge
you can select the following
Function Codes
:
–
Fixed Low (0V)
: The TTL Pin is fixed to 0V.
–
Fixed High (3.3V)
: The TTL Pin is fixed to +3.3V.
–
Connection State
: Via this function you can signal the connection state.
Please select the desired connection state under
Connection State.
The
following options are available:
–
Disconnect
–
Connect
–
System Alarm Pending
: This function signals a pending system alarm
(see CHAPTER 4.9.1).
–
System Alarm Pending (inverted)
: Same function as above, except that
here the inverted signal is transmitted.
–
Application Alarm Pending
: This function signals a pending application
alarm.
–
Decoder synced
: If the Audio decoder is synchronized, the TTL pin is set.
ATTENTION Please note that the maximum switching current is 10 mA and the maximum
switching voltage is 3.3V per TTL output.
!