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AM335X Datasheet(PDF) 4 Page - Texas Instruments |
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AM335X Datasheet(HTML) 4 Page - Texas Instruments |
4 / 5 page Revision 1.1 Known Design Exceptions to Functional Specifications www.ti.com Advisory 1.1.1 Keypad Capacitor Filter Issue Revisions Affected: 1.1A Details: The keypad on the general-purpose daughterboard has three capacitors which are meant to filter key bounces. These capacitors may interfere with software builds that use alternate means to read the keypad switches and filter the mechanical bounce from the switches. Workaround: Remove C125-C127 from the general-purpose daughterboard. Advisory 1.1.2 PORz Reset Circuit Revisions Affected: 1.1A Details: The logic driving the PWRONRSTn input on the AM335x device is at 1.8-V level instead of the VDDSHV6 level (3.3 V). Since this input generates a reset when active, this lower level may drive the board into reset when not intended. Workaround: • Remove U1. • Add an SN74AUP1G08, an SN74AVC1T45, and an SN74AUP1G08 so that PWRONRSTn on the AM335x device is driven to the correct voltage level (see Figure 1). Figure 1. PORz Circuit 4 AM335x General-Purpose EVM (Revision 1.1) SPRUHD7 – January 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated |
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