OEM6 Family Installation and Operation User Manual Rev 7
155
29
USERIO0
3.3V CMOS IO
2
General Purpose IO.
30
USERIO1
a
3.3V CMOS IO
2
General Purpose IO.
31
EVENT_IN2 /
USERIO2
3.3V CMOS IO
2
General Purpose IO. Multiplexed with
EVENT_IN2 (software selectable pin
functions). Weak pull up internal to
OEM638
32
MKO
(EVENT_OUT2)
3.3V CMOS Output
Rising
Edge
b
8
Mark Output. Outputs a user-
specified timing signal. Can be
synchronized with PPS
33
nRESET_IN
3.3V CMOS Input
Active
Low
-
Reset Input. Resets the OEM card
when low.
Minimum low time for reset is 1 us.
This pin is pulled up internally (32 k
Ω
-
100 k
Ω
).
34
GPAI0
Analog
Analog
--
-
General Purpose Analog Input.
0 - 3.3 V Input; sampled by internal
12-bit ADC.
35
_RESETOUT
3.3V CMOS Output/
Input
Active
Low
2
Reset Output. Normally high, is driven
low shortly after the receiver is reset
and remains low for approximately
140 ms.
Weak pull up internal to OEM638
36
GND
GND
GND
--
-
37
FR
3.3V CMOS Input
--
-
Reserved. Do not use. 10 kohm pull
down resistor internal to OEM638
38
ERROR/
EVENT_IN4
3.3V CMOS Output/
Input
Active
High
2
Error indicator/Multiplexed with
EVENT_IN4 (software selectable pin
functions)
39
5V
Power
Output
--
-
Onboard 5V supply. Here for legacy
support only. This supply should be
left floating unless used for reverse
compatibility with the OEMV-3.
40
EXT_LNA_PWR Power
Input
--
-
External LNA power supply input
option. An external supply between
5.5 V and
18 VDC may be connected here if the
internal 3.3 V and 5.0 V options are
not suitable. Powers the GNSS
antenna.
a. On power up, if USERIO1 (pin 30) is pulled LOW or not connected, COM1 will be configured as RS-232 at
boot. If USERIO1 (pin30) is pulled high, then COM1 will be configured as RS-422 at boot (as described in
OEM6 Family Firmware Reference Manual
(OM-20000129).
b. Software configurable. Default polarity is shown in table.
Pin
Signal Name
Signal Type
Signal
Direction Polarity
Drive
Strength
(mA)
Description
This connector mates with
Samtec SSW-120-01-G-D
(or similar). The
standard mating height for the OEM638 card is 14 mm.