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TUSB1211A1ZRQR Datasheet(PDF) 29 Page - Texas Instruments |
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TUSB1211A1ZRQR Datasheet(HTML) 29 Page - Texas Instruments |
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29 / 80 page  TUSB1211 www.ti.com SLLSE80B – MARCH 2011 – REVISED JUNE 2015 Table 5-3. HS Differential Receiver PARAMETER TEST CONDITIONS MIN TYP MAX UNIT High-speed squelch detection threshold (differential VHSSQ Ref. USB2.0 100 150 mV signal amplitude) High-speed disconnect detection threshold (differential VHSDSC Ref. USB2.0 525 625 mV signal amplitude) Ref. USB2.0, specified by eye pattern High-speed differential input signaling levels mV templates High-speed data signaling common mode voltage range VHSCM Ref. USB2.0 –50 500 (1) mV (guidelines for receiver) Ref. USB2.0, specified by eye pattern Receiver jitter tolerance 150 ps templates (1) For low-frequency Chirp signaling, the max common mode voltage range value is 600 mV 5.3.8 HS Differential Transmitter The HS transmitter is always operated through the ULPI parallel interface. The parallel data on the interface is serialized, bit stuffed, NRZI encoded, and transmitted as a dc output current on DP or DM depending on the data. Each line has an effective 22.5- Ω load to ground, which generates the voltage levels for signaling. A disconnect detector is also part of the HS transmitter. A disconnect on the far end of the cable causes the impedance seen by the transmitter to double thereby doubling the differential amplitude seen on the DP/DM lines. 5.3.9 Autoresume Asserting AUTORESUME bit enables the PHY to automatically transmit resume signaling. Refer to USB2.0 specification Section 7.1.7.7 and Section 7.9 for more details. When autoresume is enabled, if the PHY detects a resume-K it takes automatically over-driving of the resume-K within 1 ms. If AUTORESUME_WDOG_EN bit is set (default is 1), then an internal autoresume watchdog timer, based on the internal 32K oscillator, CK32K, will be initialized and will start counting when the PHY detects a resume-K. If AUTORESUME_WDOG_EN bit is set then if the PHY does not receive a TXCMD of the NOPID type within TAUTORESUME it will stop driving the resume-K and the USB bus will go back to IDLE-J state Otherwise the PHY will continue to drive the resume-K until it receives a TXCMD of the NOPID type from the LINK. 5.3.10 UART Transceiver By setting CARKITMODE bit in IFC_CTRL register, the TUSB1211 device will enter UART mode. In this mode, the ULPI data bus is redefined as a 2-pin UART interface, which exchanges data through a direct access to the FS/LS analog transmitter at DM pin and receiver at DP pin. See Figure 5-1 for the USB UART data flow. Figure 5-1. USB UART Data Flow Copyright © 2011–2015, Texas Instruments Incorporated Detailed Description 29 Submit Documentation Feedback Product Folder Links: TUSB1211 |
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