USB-Serial Bridge Controller Support for Remote Wakeup - KBA91655

Version: *A

 

Question:

Does the USB-Serial Bridge Controller support remote wakeup?

 

Answer:

Yes. The USB-Serial Bridge Controller (CY7C65211/CY7C65213/CY7C65215) supports remote wakeup. The remote wakeup feature can be enabled by using the Cypress USB-Serial Configuration Utility as shown in Figures 1 and 2. Click the Configure button adjacent to the Remote Wake-up and Suspend option (as shown in Figure 1) for the CY7C65211/CY7C65215 device and click the Configure button adjacent to the RI# and Sleep# option (as shown in Figure 2) for the CY7C65213 device.

Figure 1. Remote Wake-up and Suspend Option for CY7C65211/CY7C65215

Figure 2. RI# and Sleep# Option for CY7C65213

When enabled (as shown in Figures 3 and 4), the Remote wake-up or RI# option (Remote wake-up name is used in CY7C65211 and CY7C65215 whereas RI# name is used in CY7C65213) can be used to wake up the USB host (from the suspend state) remotely from the attached USB-Serial Bridge Controller device. You need to connect the WAKEUP or RI# pin to GND (WAKEUP pin name is used in CY7C65211 and CY7C65215 whereas RI# pin name is used in CY7C65213) to wake-up the USB host if the Invert Polarity option in the Cypress USB-Serial Configuration Utility is not selected (as shown in Figure 3 for CY7C65211 or CY7C65215 and Figure 4 for CY7C65213). The WAKEUP or RI# pin should be connected to VCCIO/VDDD if the Invert Polarity option is selected.

Note: VDDD is the pin name used in CY7C65211 and CY7C65215. VCCIO is the pin name used in CY7C65213.

Figure 3. Configuration of Remote Wake-up in CY7C65211 and CY7C65215

Figure 4. Configuration of RI# in CY7C65213