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TSU6111RSVR Datasheet(PDF) 10 Page - Texas Instruments |
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TSU6111RSVR Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 32 page  TSU6111A SCDS331 – FEBRUARY 2012 www.ti.com ACCESSORY ID DETECTION If VBUS_IN is high and the attachment is not a charger, then determine the impedance on the ID pin. If VBUS_IN is low and an accessory is attached, then use an ADC for impedance sensing on the ID pin to identify which accessory is attached. IMPEDANCE BUCKETS FOR EACH ACCESSORY In order to implement ID detection, each accessory should contain a ID impedance resistor value (refer toTable 2) which has a 5% tolerance accuracy. Table 2. Accessory ID and Switch States SWITCH STATE FACTORY CABLE DETECTED RESISTOR ADC ACCCESSORY IMPEDANCE TOLERANCE DP/DM VALUE JIG BOOT ON ID (%) USB UART OTG 0 — 0 ON OFF OFF OFF MHL 1K 5% 0 OFF OFF OFF OFF Audio Device Type 3 28.7K 5% 1110 OFF OFF OFF OFF Reserved Accessory #1 34K 5% 1111 OFF OFF OFF OFF Reserved Accessory #2 40.2K 5% 10000 OFF OFF OFF OFF Reserved Accessory #3 49.9K 5% 10001 OFF OFF OFF OFF Reserved Accessory #4 64.9K 5% 10010 OFF OFF OFF OFF Audio Device Type 2 80.27K 5% 10011 OFF OFF OFF OFF Phone Powered Device 102K 5% 10100 OFF ON OFF OFF TTY Converter 121K 5% 10101 OFF OFF OFF OFF UART Cable 150K 5% 10110 OFF ON OFF OFF Type 1 Charger 200K 5% 10111 OFF OFF OFF OFF Factory Mode Cable - Boot Off USB 255K 5% 11000 ON OFF ON OFF Factory Mode Cable - Boot On USB 301K 5% 11001 ON OFF ON ON Audio/Video Cable 365K 5% 11010 OFF OFF OFF OFF Type 2 Charger 442K 5% 11011 OFF OFF OFF OFF Factory Mode Cable - Boot Off UART 523K 5% 11100 OFF ON ON OFF Factory Mode Cable - Boot On UART 619K 5% 11101 OFF ON ON ON Stereo Headset with Remote (Audio Device Type 1) 1000.07K 10% 11110 OFF OFF OFF OFF Mono/Stereo Headset (Audio Device Type 1) 1002K 10% 11110 OFF OFF OFF OFF No ID — — 11111 OFF OFF OFF OFF USB Standard Downstream Port — — 11111 ON OFF OFF OFF USB Charging Downstream Port — — 11111 ON OFF OFF OFF Dedicated Charging Port — — 11111 OFF OFF OFF OFF 10 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): TSU6111A |
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