A.6.
I
N
A.6 IN
PIN #
Description
1
Reserved, leave unconnected.
2
Ground
3
Reserved, leave unconnected.
4
nRST_
I
N. Driving this pin low resets the receiver.
I
nternally pulled-up.
Debouncing and deglitching is foreseen.
5
EVENTA input, 0-30V, pulled down.
I
nput voltage should be at least 3V
to be detected as high. First input for external event timing. Event
polarity is controlled by the
setEventParameters
command.
6
EVENTB input, 0-30V, pulled down.
I
nput voltage should be at least 3V
to be detected as high. Second input for external event timing. Event
polarity is controlled by the
setEventParameters
command.
7
ANT_EXT, external antenna power. Can be used to apply an external
supply voltage to the antenna. The voltage applied to ANT_EXT(V
AN T
)
determines the voltage source on the MA
I
N connector, as follows:
•
if
V
AN T
<
2
.
0
V
or ANT_EXT left open, the antenna is powered by
the internal 5V supply;
•
if
3
.
0
V < V
AN T
<
4
.
0
V
, there is no power provided to the MA
I
N
connector;
•
if
5
.
0
V < V
AN T
<
12
.
0
V
, the antenna power supply is taken from
ANT_EXT.
Warning:
Exceeding 12.0V for V
AN T
, or drawing more than 200mA from the
antenna connector can permanently damage the receiver.
A.7 USB Host
PIN #
Description
1
USB-H VBus (max current: 500mA)
2
Ground
3
USB-H D
−
4
USB-H D
+
5
Reserved
A.8 PWR
PIN #
Description
1
Power: 9 to 30V DC
2
Always ON. When this pin is tied to pin#1 the receiver is always on
regardless of the state of the power button. Connect to Ground to
enable the power button.
3
Ground
79
