OEM7700 Strobe Specifications
Strobes |
Input/Output |
Factory Default |
Comment |
ERROR |
Output |
Active high |
Normally low. |
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 MARKxPOS and MARKxTIME logs and ONMARK trigger.) Polarity is configurable using the EVENTINCONTROL 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). |
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. 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. This pin must be held low for >20 µs while stable power is already applied, to reset the OEM7700 card. It is recommended to hold the nRESET_IN pin low for a >150 ms when initially applying power to the card, giving the power supply time to stabilize before the card starts to boot. |
PPS |
Output |
Active low |
A time synchronization output. This is a pulse where the leading edge is synchronized to receiver calculated GNSS Time. The polarity, period and pulse width can be configured using the PPSCONTROL command |
Strobe |
Sym |
Min |
Max |
Current |
ERROR |
VOL |
|
0.2 |
8 |
VOH |
3.1 |
|
||
EVENT_IN1 (Mark ) EVENT_IN2 (Mark2) EVENT_IN3 (Mark3) EVENT_IN4 (Mark4) |
VIL |
|
0.8 |
- |
VIH |
1.7 |
|
||
EVENT_OUT1 EVENT_OUT2 EVENT_OUT3 EVENT_OUT4 |
VOL |
|
0.2 |
8 |
VOH |
3.1 |
|
||
ME_RDY |
VOL |
|
0.2 |
4 |
VOH |
3.1 |
|
||
POS_VALID |
VOL |
|
0.55 |
8 |
VOH |
2.3 |
|
||
nRESET_IN |
VIL |
|
0.8 |
- |
VIH |
2.55 |
|
||
PPS |
VOL |
|
0.55 |
24 |
VOH |
2.3 |
|