UNICORECOMM UM220-INS NF, User Manual

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UM220 User Manual
8
3.4 Pin Definition (Top View
）
NC
NC
TXD1
RXD1
VCC
TIME PULSE
WHEELTICK
NC
NC
FWD
NC
nRESET
VCC_RF
GND
RF_IN
GND
V_BCKP
GND
GND
NC
NC
TXD2
RXD2
NC
Top View
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Figure 3-2 Top View
Pin No. Name I/O Electrical Level Description
1 nRESET I LVTTL For reset
1=normal
0=reset
2 NC — — Reserve
3 TIMEPUL
SE
O LVTTL Time pulse(1PPS)
4 WHEELTI
CK
I LVTTL Odometer speed pulse
Incorrect signals of the odometer will lead to
serious problems in the use of the product.
Please make sure the signal is correct.
5 NC — — Reserve
6 TXD2 O LVTTL UART 2-TX
7 RXD2 I LVTTL UART 2-RX
8 NC — — Reserve
9 VCC_RF
6
O Output Voltage RF section
10 GND — — Ground
11 RF_IN I — GNSS signal input (BD2 B1+GPS L1)
12 GND — — Ground
13 GND — — Ground
14 NC — — Reserve
15 FWD I LVTTL Odometer forward
6 The maximum output current for VCC_RF is 60 mA,
with current limiting protection function. However,
long-term short circuit will still cause irreparable damage to the module.