Usb-Uart Connector (J901); Expansion Connector (J1003) - NXP Semiconductors i.MX 8M Nano LPDDR4 EVK User Manual

NXP Semiconductors

2.15 USB-UART connector (J901)

The i.MX 8M Nano Applications Processor has four independent UART ports, UART1 - UART4. On the EVK board, UART2 is
used for Cortex-A53 core and UART4 is used for Cortex-M7 core. We use a single-chip USB to dual-channel UART IC for system
debugging, and the part number is FT2232D. The developers can download the driver from FTDI. After the driver for FT2232D is
installed, the PC will enumerate two COM ports when the USB cable is plugged into J901. Developers can use Putty, Tera Term,
Xshell, or other terminal tools. The required settings are as listed in
Table 4. Terminal setting parameters
Data rate
Data bits
Parity
Stop bits

2.16 Expansion connector (J1003)

One 40-pin dual-row Pin Header connector, J1003, is provided on the EVK board to support I
connection. The developers can use the port for some specific application development.
Table 5. J1003 pin definition
No. Net name
1 VEXT_3V3
3 I2C3_SDA_3V3
5 I2C3_SCL_3V3
7 UART3_CTS
9 GND
11 UART3_RTS
13 EXP_IO9
15 EXP_IO10
17 VEXT_3V3
19 ECSPI2_MOSI
21 ECSPI2_MISO
23 ECSPI2_SCLK
25 GND
User's Guide
Description
Power Output, 3.3 V
I2C3 data signal
I2C3 clock signal
UART3 clear to send signal
Ground
UART3 request to send signal
Expansion IO signal
Expansion IO signal
Power Output, 3.3 V
SPI2 data signal, master output
slave input
SPI2 data signal, master input
slave output
SPI2 clock signal
Ground
Table continues on the next page...
i.MX 8M Nano LPDDR4 EVK Board Hardware User's Guide, Rev. 1, 12/2020
Table 4.
115,200 baud
8
None
1
2
S, UART, I2C, and GPIO
No. Net name
2 VDD_5V
4 VDD_5V
6 GND
8 UART3_TXD
10 UART3_RXD
12 EXP_IO8
14 GND
16 EXP_IO11
18 —
20 GND
22 —
24 ECSPI2_SS0
26 —
Specifications
Description
Power Output, 5 V
Power Output, 5 V
Ground
UART3 transmit signal
UART3 transmit signal
Expansion IO signal
Ground
Expansion IO signal
NC
Ground
NC
SPI2 chip select signal
NC
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