unicore UM982 - BIF Function Pin; UART;CAN COM3 Pins; PPS Timing Pin; EVENT Marker Pin

UM982 User Manual
8 Hardware UC-00-M31 EN R1.2
No.
Pin
I/O
Description
24
VCC
POWER
Power supply (+3.3 V)
25
BIF
—
Built-in function; recommended to add a through-
hole testing point and a 10 kΩ pull-up resistor;
cannot connect ground or power supply, cannot
input/output data, and cannot be floating
26
BIF
—
Built-in function; recommended to add a through-
hole testing point and a 10 kΩ pull-up resistor;
cannot connect ground or power supply, cannot
input/output data, and cannot be floating
27
TXD3
O
COM3 output, which can be used as CAN TXD,
LVTTL level
28
RXD3
I
COM3 input, which can be used as CAN RXD,
LVTTL level
29
RSV
—
Reserved, floating
30
PPS
O
Pulse per second, with adjustable pulse width and
polarity
31
RSV
—
Reserved, floating
32
EVENT
I
Event mark input, with adjustable frequency and
polarity
33
RESET_N
I
System reset, active low, and the active time
should be no less than 5 ms.
34
GND
—
Ground
35
GND
—
Ground
36
ANT2_IN
I
GNSS slave antenna signal input
37
GND
—
Ground
38
RSV
—
Reserved, floating
39
RSV
—
Reserved, floating
40
RSV
—
Reserved, floating
41
GND
—
Ground