Usb Application With Usb Remote Wakeup Function; Usb Application Without Usb Remote Wakeup Function - Quectel QuecOpen AG521R-NA Hardware Design

NOTE
DRX cycle index values are broadcasted by the base station through the wireless network.

3.5.1.1. USB Application with USB Remote Wakeup Function

If the host supports USB suspend/resume and remote wakeup function, the following three preconditions must be
met to let the module enter sleep mode.
⚫
Use sleep API to enable the sleep mode.
⚫
Ensure the level of pins that configured as wake-up interrupt in Table 5 are under non-wakeup status.
⚫ The host's USB bus, which is connected with the module's USB interface, enters suspended state.
The following figure shows the connection between the module and the host.
Figure 4: Sleep Mode Application with USB Remote Wakeup
⚫
Sending data to the module through USB will wake up the module.
⚫
When the module has URC to report, it will send remote wake-up signals via USB bus so as to wake up the
host.

3.5.1.2. USB Application without USB Remote Wakeup Function

If the host supports USB suspend/resume, but does not support remote wake-up function, it needs to be woken up
via the module's GPIO.
There are three preconditions to let the module enter sleep mode.
AG521R-NA_QuecOpen_Hardware_Design
Figure 3: Sleep Mode Current Consumption Diagram
USB_VBUS
USB Interface
GND
Module
Automotive Module Series
AG521R-NA QuecOpen Hardware Design
VDD
USB Interface
GND
Host
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