APPENDIX D OEM7720 Technical Specifications
OEM7 Installation and Operation User Manual v4
200
D.5 OEM7720 Strobe Specifications
Strobes
Input/Output
Factory
Default
Comment
ERROR
Output
Active
high
Normally low.
A high output on this pin indicates that the receiver
is in an error state. For information about the cause
of the error, log the
RXSTATUS
log.
EVENT_IN1
EVENT_IN2
EVENT_IN3
EVENT_IN4
Input
Leading edge
triggered
Active
low
Input marks for which a pulse greater than 150 ns
triggers certain logs to be generated. (Refer to the
MARKPOS and MARKTIME logs and ONMARK
trigger.) Polarity is configurable using the
MARKCONTROL
command.
EVENT_OUT1
EVENT_OUT2
EVENT_OUT3
EVENT_OUT4
Output
Active
low
Programmable variable frequency outputs ranging
from 0 Hz to 50 MHz (refer to the
EVENTOUTCONTROL
command).
Note
: EVENT_OUT1 can also be controlled by the
FREQUENCYOUT
command.
ME_RDY
Output
Active
high
Indicates to the host system that the receiver is
ready to receive commands.
This signal is not asserted while booting or during a
reset.
Note
: If an error is detected during receiver
operation (for example, an over temperature
condition), the ERROR signal is asserted and the ME_
RDY signal will normally remain asserted:
commands can still be sent to the receiver under
these conditions. At the time ERROR is asserted,
POS_VALID signal is changed to not asserted. In the
rare case of a fatal, unrecoverable error that leads
to a reboot of the receiver, ME_RDY, ERROR and
POS_VALID are all not asserted while the receiver
restarts.
POS_Valid
(Position Valid)
Output
Active
high
Indicates a valid GNSS position solution is available.
nRESET_IN
Input
Active
low
Reset signal input from external system; active low,
50 ms duration. Hold the nRESET_IN pin low for
>150 ms after power is applied
Table 44: OEM7720 Strobes Description
