TUSB2E221 datasheet(25/65 Pages) TI

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The special wake on disconnect sequence when disconnect event interrupt mode is enabled

• System enables interrupt USB_DISCONNECT_Px.

• Repeater is in host mode and has received a CM.L2.

• Repeater detects SE0 for disconnect on USB 2.0.

• Repeater asserts interrupt.

• Interrupt must be cleared prior to eDSPr reinitializing the TUSB2E221 as a host.

• Repeater does not signal or report USB 2.0 SE0 on eUSB2.

• Repeater waits for eDSPr to power up, which starts with port reset announcement.

• Repeater and eDSP follow normal eUSB2 protocol, ending in unconnected state of host mode.

Figure 8-3. Timing Diagram for Disconnect Interrupt for HS/FS

8.4.6 Attach Detect Interrupt Mode

When attach event detect is enabled the TUSB2E221 issues an interrupt event instead of signaling attach on

eUSB2.

• System enables interrupt USB_DETECT_ATTACH_Px. Interrupt must be enabled prior to any connect event.

• Repeater is in host mode.

• Repeater detects attach on USB 2.0.

• Repeater debounces attach for 60µs and asserts interrupt instead of signaling attach on eUSB2.

• Interrupt must be disabled prior to eDSPr reinitializing as a host to process attach through normal

mechanism.

Figure 8-4. Timing Diagram for Attach Detect Interrupt for HS/FS

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TUSB2E221

SNLS757B – JUNE 2024 – REVISED NOVEMBER 2024

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