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2
Device description
2.1 USB
A USB 2.0-compatible serial port is featured for data communication and power supply. USB drivers
are installed automatically through Windows update.
2.2 UART
The unit includes an RS-232 port which can be dynamically connected to the UARTs of the ZED-F9R
module or the MCU. Selection of the UART connection is controlled by the NEO_UART_SEL and
MCU_UART _SEL pins on the front connector.
NEO_UART_SEL
LOW
OPEN
OPEN
LOW
The selected UART interface is also available via the RxD and TxD pins on the front connector.
☞
RxD and TxD pins on the front connector are at TTL voltage levels.
⚠
Flow control should not be used with the RS-232 port.
2.3 Antenna
The kit includes u-blox ANN-MB L1/L2 active multi-band GNSS antenna with a 5-meter cable. There
is a female SMA connector (RF IN) available on the front side of the unit for connecting the antenna.
⚠
Do not use the SMA connector in the back. It is reserved for future use.
2.4 14-pin front connector
The connector and its signals are described in the table below.
Pin no.
Pin name
14
VIN 5-24V
13
GND
12
CAN_H
11
CAN_L
10
NEO_UART_SEL
9
MCU_UART_SEL
8
TIME_MARK
7
WHEELTICK
6
DIRECTION
5
SDA
4
SCL
3
TxD
2
RxD
1
GND_A
⚠
Leave the reserved pins open.
UBX-20029244 - R03
C1-Public
MCU_UART_SEL
OPEN
LOW
OPEN
LOW
I/O
Level
Description
I
5 - 24 V
Power input – can be used in place of USB
Common ground pin for case-work, power and serial interface connections
I
Connect to the vehicle CAN high wire (ISO 11898-2)
I
Connect to the vehicle CAN low wire (ISO 11898-2)
I
-
Reserved
I
-
Pull-down signal for enabling UART communication with the MCU
I
Time mark input
I
5 - 24 V
Wheel tick pulse input
I
5 - 24 V
Direction of travel input
Reserved
Reserved
I/O
3.3 V
UART TxD
I/O
3.3 V
UART RxD
Ground for wheel tick and direction signals
Device description
C102-F9R - User guide
Connected component
Reserved
MCU
ZED-F9R
None
Page 6 of 32
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