unicore UM981, Руководство пользователя, Страница: 13 / 27

UM981 User Manual
8 Hardware UC-00-M33 EN R1.0
No. Pin I/O Description
19 PVT_STAT O
PVT status: active high;
Outputs high when positioning and low when
not positioning
20 RTK_STAT O
RTK status: active high;
Outputs high for RTK fixed solution and low
for other positioning status or no positioning
21 ERR_STAT O
Error status: active high;
Outputs high when failing self-test and low
when passing self-test
22 RSV — Reserved, recommended to be floating
23 RSV — Reserved, recommended to be floating
24 NC — No connection inside
25 NC — No connection inside
26 RXD2 I COM2 input, LVTTL
27 TXD2 O COM2 output, LVTTL
28 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 or input/output data, but can be
floating
29 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 or input/output data, but can be
floating
30 TXD3 O
COM3 output, can be used as CAN TXD,
LVTTL
31 RXD3 I COM3 input, can be used as CAN RXD, LVTTL
32 GND — Ground