TEXAS INSTRUMENTS Errata SLLZ053 October 2006 TUSB2036 Errata Manual

This document describes a bug in TI TUSB2036, TUSB2046B and TUSB2077A in detecting the speed of connected devices. The bug may cause the devices to be recognized as low speed devices.

Brand: Texas Instruments
Category: Other Electronics
Document type: Application Note
Language: English
Pages: 2
File format: PDF
File size: 20 KB
Published: 13 March, 2012
Updated: 30 September, 2023
MD5 checksum: 8F70CF0ECB5FEEC3B76BA587D5C9F63A
PDF: TEXAS INSTRUMENTS Errata SLLZ053 October 2006 TUSB2036 Errata Manual PDF

About this manual

The document describes an errata for the TUSB2036 USB hub controller (also affecting TUSB2046B and TUSB2077A). It explains that the device samples speed at the first V4 crossing instead of after the required 100 ms debounce, which can cause false low‑speed detection with newer downstream devices.

The errata lists the affected parts and recommends a software fix: issue CLEAR_PORT_FEATURE(PORT_ENABLE) followed by a RESET_PORT after ensuring DP and DM lines are stable. It also includes a standard Texas Instruments legal notice.

What's inside

Parts Affected
Symptom
Description
IMPORTANT NOTICE

Specifications

Parts Affected	TUSB2036SLLS372B, TUSB2046BSLLS413B, TUSB2077ASLLS414A

Frequently asked questions

How can false low‑speed detection be resolved?

Issue a CLEAR_PORT_FEATURE(PORT_ENABLE) followed by a RESET_PORT in the driver after ensuring DP and DM are stable.

Download PDF (20 KB)