TEXAS INSTRUMENTS Errata SLLZ051 October 2006 TUSB2046B Errata Manual

This document mentions that TI's TUSB2046B, TUSB2077A and TUSB2036 chips have a small problem in determining the intended speed of an attached downstream device. According to the USB specification, the speed should be determined by sampling the DP or DM line following a 100ms debounce interval after either signal (DP or DM) first crosses the VIH threshold. The TUSB2046B (TUSB2077A, TUSB2036) actually samples the speed at the first VIH crossing and latches this value. This issue has only been observed recently with newer devices that either drive DM high or show excessive ringing during the initial connection, hence causing the speed detection to be seen as low speed by the TUSB2046B (TUSB2077A, TUSB2036).

Brand: TEXAS

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MD5 Checksum: 4E42AB98A20681AAA3A73F1F6A2BC0DF

Publication date: 13 March, 2012

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PDF Link: TEXAS INSTRUMENTS Errata SLLZ051 October 2006 TUSB2046B Errata Manual PDF

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