Receiver pinouts
Applicable receivers: BD982
40-pin header
The 40-pin header (J1) has the following pinouts:
|
Pin |
Signal name |
Description |
Integration notes |
|---|---|---|---|
|
1 |
GND |
Ground Digital ground |
Ground Digital ground |
|
2 |
RTK LED |
RTK LED. Flashes when an RTK correction is present. This is similar to all OEM GNSS products, except for the requirement for an external resistor. |
When used to drive an LED, a series resistor with a typical value of 300 Ohms is required. This pin supplies a maximum current of 4 mA For LEDs with Vf above 2.7 or current excess of 4 mA, an external buffer is required. |
|
3 |
POWER_OFF |
Powers the unit on and off. |
Drive high with a 3.3 V to gracefully shut down the unit, leave floating, or ground to keep the unit on. Integrators should not drive TTL signals when the unit is not powered. |
|
4 |
PPS (Pulse Per Second) |
Pulse Per Second |
This is 3.3 V TTL level, 4 mA max drive capability. To drive 50 load to ground, an external buffer is required. |
|
5 |
VCC Input DC Card Power |
VCC Input DC Card power (3.3 V only) |
VCC Input DC Card power (3.3 V only) |
|
6 |
VCC Input DC Card Power |
VCC Input DC Card power (3.3 V only) |
VCC Input DC Card power (3.3 V only) |
|
7 |
Event2, CAN1_Rx and COM3_Rx |
Event2 – Event input CAN1_Rx - CAN Receive line
COM3_Rx – COM3 Receive line |
MUTUALLY EXCLUSIVE and TTL level. Connect Event2 to a TTL level signal to use as Event. Connect CAN1_Rx to RX line of a CAN driver to use as CAN. Connect COM3_Rx to a transceiver if RS-232 level is required. |
|
8 |
Event1 |
Event1 – Input |
Event1 (must be 3.3 V TTL level) |
|
9 |
Power LED |
POWER Indicator. High when unit is on, low when off. This is similar to all OEM GNSS products, except for the requirement for an external resistor. This allows user to use this as a control line. |
When used to drive an LED, a series resistor with a typical value of 300 Ohms is required. This pin supplies a maximum current of 4 mA For LEDs with Vf above 2.7 or current excess of 4 mA, an external buffer is required. |
|
10 |
Satellite LED |
Satellite LED. Rapid flash indicates <5 satellites. Slow flash indicates >5 satellites. |
When used to drive an LED, a series resistor with a typical value of 300 Ohms is required. This pin supplies a maximum current of 4 mA For LEDs with Vf above 2.7 or current excess of 4 mA, an external buffer is required. |
|
11 |
COM2_CTS |
COM2 Clear to Send – TTL Level |
Connect COM2_CTS to a transceiver if RS-232 level is required. |
|
12 |
RESET_IN |
RESET_IN – ground to reset |
Drive low to reset the unit. Otherwise, leave unconnected. |
|
13 |
COM2_RTS |
COM 2 Request to Send – TTL Level |
Request to Send for COM 2 connect to a transceiver if RS-232 level is required. |
|
14 |
COM2_Rx |
COM 2 Receive Data – TTL Level |
Connect COM2_RX to a transceiver if RS-232 level is required. |
|
15 |
NO CONNECT |
Reserved |
|
|
16 |
COM2_Tx |
COM 2 Transmit Data – TTL Level |
Connect COM2_TX to a transceiver if RS-232 level is required |
|
17 |
NO CONNECT |
Reserved |
|
|
18 |
COM1_Rx |
COM 1 Receive Data – RS-232 Level |
|
|
19 |
CAN1_Tx and COM3_Tx |
CAN1_Tx - CAN Transmit line COM3_Tx – COM3 Transmit line |
MUTUALLY EXCLUSIVE and TTL level. Connect CAN1_Tx to TX line of a CAN driver to use as CAN. Connect COM3_Tx to a transceiver if RS-232 level is required. |
|
20 |
COM1_Tx |
COM 1 Transmit Data – RS-232 Level |
|
|
21 |
USB D (-) |
USB D (-) Bi-directional USB interface data (-) |
USB data for OTG mode (device and host). |
|
22 |
USB D (+) |
USB D (+) Bi-directional USB interface data (+) |
USB data for OTG mode (device and host). |
|
23 |
GND |
Ground Digital ground |
Ground Digital ground |
|
24 |
GND |
Ground Digital ground |
Ground Digital ground |
|
25 |
USB ID |
USB OTG ID |
Driving a low level puts unit into USB host mode. High level or no-connect puts unit in device mode. Pull-up is on unit and not required for integration. |
|
26 |
USB Vbus |
USB Vbus |
In USB device operation, Vbus is only used for detection. In USB host mode, the unit supplies power per USB spec (500 mA at 5 V max). |
|
27 |
GND |
Ground Digital ground |
Ground Digital ground |
|
28 |
GND |
Ground Digital ground |
Ground Digital ground |
|
29 |
GND |
Ground Digital ground |
Ground Digital ground |
|
30 |
GND |
Ground Digital ground |
Ground Digital ground |
|
31 |
GND |
Ground Digital ground |
Ground Digital ground |
|
32 |
GND |
Ground Digital ground |
Ground Digital ground |
|
33 |
ETH_TD+ |
Ethernet Transmit. Positive side of differential pair. |
Connect straight to ethernet connector. Magnetics are on-board unit. |
|
34 |
ETH_RD+ |
Ethernet Receive. Positive side of differential pair. |
Connect straight to ethernet connector. Magnetics are on-board unit. |
|
35 |
ETH_TD- |
Ethernet Transmit. Negative side of differential pair. |
Connect straight to ethernet connector. Magnetics are on-board unit. |
|
36 |
ETH_RD- |
Ethernet Receive. Negative side of differential pair. |
Connect straight to ethernet connector. Magnetics are on-board unit. |
|
37 |
COM4_Rx |
COM 4 Receive data – RS-232 level |
– |
|
38 |
COM4_Tx |
COM 4 Transmit data – RS-232 level |
– |
|
39 |
GND |
Ground Digital ground |
Ground Digital ground |
|
40 |
GND |
Ground Digital ground |
Ground Digital ground |
