Uart Interfaces - Quectel EG060K Series Hardware Design

⚫
Do not route signal traces under crystals, oscillators, magnetic devices, PCIe and RF signal traces.
It is vital to route the USB differential traces in inner-layers of the PCB, and surround the traces with
ground on that layer and with ground planes above and below.
⚫
If a USB connector is used, keep the ESD protection devices as close to the USB connector as
possible.
⚫ Pay attention to the selection of the ESD protection device since the device's junction capacitance
may cause influences on USB data traces. Typically, the stray capacitance should be less than 2.0
pF for USB 2.0, and less than 0.4 pF for USB 3.0.
⚫ If possible, reserve a 0 Ω resistor on USB_DP and USB_DM traces respectively.
Table 14: USB Trace Length Inside the Module
Pin No. Signal Trace
34 USB_DP
33 USB_DM
37 USB_SS_TX_M
38 USB_SS_TX_P
40 USB_SS_RX_P
41 USB_SS_RX_M

4.3. UART Interfaces

The module provides three UART interfaces: main UART interface, debug UART interface, and
Bluetooth UART interface*
below:
⚫
Main UART interface supports 4800 bps, 9600 bps, 19200 bps, 38400 bps, 57600 bps, 115200 bps
(default), 230400 bps, 460800 bps and 921600 bps baud rates. This interface is used for data
transmission and AT command communication.
⚫
Debug UART interface supports 115200 bps baud rate. It is used for Linux console and log output.
⚫
Bluetooth UART
and can be multiplexed from SPI interface.
EG060K &EG120K _Series_Hardware_Design
103
(multiplexed from SPI interface). Features of these interfaces are shown as
interface* supports 115200 bps baud rate. It is used for Bluetooth communication
Length (mm)
16.02
16.34
20.57
20.21
19.62
19.46
LTE-A Module Series
Length Difference
0.32
0.36
0.16
46 /