User Manual for BX40C GNSS Board v2.0
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4.2 System integration
4.2.1 Connectors on BX40C board
There are two connectors on the BX40C board: a 24-pin and a 6-pin header.
Table 4.2 24-pin header signals definition
Pin Signal
Type Description
1
GND
GND Ground digital ground
2
RTK_LED
O
RTK LED, flashes when an RTK correction is
present.
3
RSV/POWER_OFF
IO
Reserved, compatible with power off
4
PPS
O
Pulse per second output, 3.45V TTL level.
5
VCC
PWR +3.45V DC power supply
6
VCC
PWR +3.45V DC power supply
7
CAN1_RX/RX3/EVENT2 IO
CAN1
_
RX, CAN Receive line;
COM3 RX, COM3 Receive line, TTL level;
Event2, Event input, TTL level.
8
EVENT1
IO
Event1 input, 3.45V TTL level
9
PWRLED
O
Power indicator, high when unit is on, low when
off.
10
SATLED
O
Satellite LED, rapid flash indicates <5 satellites,
slow flash indicates >5 satellites.
11
COM2_CTS
IO
COM2 Clear to Send, TTL level
12
nRESETIN
I
Reset input, active low to reset.
13
COM2_RTS
IO
COM2 Request to Send, TTL level
14
COM2_RX
I
COM2 Receive Data, TTL level
15
COM1_CTS
IO
COM1 Clear to Send, RS-232 level
16
COM2_TX
O
COM2 Transmit Data, TTL level
17
COM1_RTS
IO
COM1 Request to Send, RS-232 level
18
COM1_RX
I
COM1 Receive Data, RS-232 level
19
COM3_TX/CAN1_TX
O
COM3 Transmit Data, TTL level;
CAN1 Transmit line.
20
COM1_TX
O
COM1 Transmit Data, RS-232 level
21
USB D-
IO
USB Data- bi-directional
22
USB D+
IO
USB Data+ bi-directional
23
GND
GND Ground digital ground
24
GND
GND Ground digital ground
