Product Info

Automotive Module Series
AG521R-NA QuecOpen Hardware Design
AG521R-NA_QuecOpen_Hardware_Design 37 / 104
⚫ Use sleep & wakeup 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.
USB Interface
VDD
USB Interface
Module
Host
GND
GND
USB_VBUS
GPIO
EINT
Figure 5: Sleep Mode Application without USB Remote Wakeup
⚫ Sending data to the module through USB will wake up the module.
⚫ When the module has URC to report, the module’s GPIO signal can be used to wake up the host.
3.5.1.3. USB Application without USB Suspend Function
If the host does not support USB suspend function, USB_VBUS should be connected with an external control
circuit to set the module to 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.
⚫ Disconnect USB_VBUS.
The following figure shows the connection between the module and the host.
USB Interface
VDD
USB Interface
Module
Host
GND
GND
USB_VBUS
GPIO
EINT
Power
Switch
GPIO