CYUSB2014-BZXI datasheet(73/82 Pages) INFINEON

73 / 82 page

Datasheet

001-52136 Rev. *Y

2022-08-11

EZ-USB FX3

SuperSpeed USB Controller

Errata

7.Low Power U1 Fast-Exit Issue with USB3.0 host controller.

Problem definition

When FX3 device transitions from Low power U1 state to U0 state within 5 µs after

entering U1 state, the device sometimes fails to transition back to U0 state, resulting

in USB Reset.

Parameters affected NA

Trigger condition(s)

This condition is triggered during low power transition mode.

Scope of impact

Unexpected USB warm reset during data transfer.

Workaround

This problem can be worked around in the FW by disabling LPM (Link Power

Management) during data transfer.

Fix status

FW workaround is proven and reliable.

8.USB data corruption when operating on hosts with poor link quality.

Problem definition

If FX3 is operating on a USB 3.0 link with poor signal quality, the device could send

corrupted data on any of the IN endpoints (including the control endpoint).

Parameters affected NA

Trigger condition(s)

This condition is triggered when the USB3.0 link signal quality is very poor.

Scope of impact

Data corruption in any of the IN endpoints (including the control endpoint).

Workaround

The application firmware should perform an error recovery by stalling the endpoint on

receiving CYU3P_USBEPSS_RESET_EVT event, and then stop and restart DMA path

when the CLEAR_FEATURE request is received.

Note: SDK versions 1.3.3 and above internally manages the DMA transfers and

performs the endpoint reset when potential error conditions are seen. For more details

in application firmware, please refer to GpiftoUsb example available with SDK.

Fix status

FW Work-around is proven and reliable.

9.Device treats Rx Detect sequence from the USB 3.0 host as a valid U1 exit LFPS burst.

Problem definition

The USB 3.0 PHY in the FX3 device uses an electrical idle detector to determine whether

LFPS is being received. The duration for which the receiver does not see an electrical

idle condition is timed to detect various LFPS bursts. This implementation causes the

device to treat an Rx Detect sequence from the USB host as a valid U1 exit LFPS burst.

Parameters affected NA

Trigger condition(s)

This condition is triggered when the USB host is initiating an Rx Detect sequence while

the USB 3.0 Link State Machine on the FX3 is in the U1 state. Since the host will only

perform Rx Detect sequence in the RX Detect and U2 states, the error condition is seen

only in cases where the USB link on the host has moved into the U2 state while the link

on FX3 is in the U1 state.

Scope of impact

FX3 moves into Recovery prematurely leading to a Recovery failure followed by Warm

Reset and USB re-enumeration. This sequence can repeat multiple times resulting in

data transfer failures.

Workaround

FX3 can be configured to transition from U1 to U2 a few microseconds before the host

does so. This will ensure that the link will be in U2 on the device side before the host

attempts any Rx Detect sequence; thereby preventing a false detection of U1 exit.

Fix status

Workaround is implemented in FX3 SDK library 1.3.4 and above.

CYUSB2014-BZXI Datasheet(PDF) 73 Page - Infineon Technologies AG

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