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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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TUSB8040A Datenblatt(PDF) 13 Page - Texas Instruments |
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TUSB8040A Datenblatt(HTML) 13 Page - Texas Instruments |
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13 / 39 page  TUSB8020A, TUSB8040A www.ti.com SLLSEA7B – MAY 2012 – REVISED AUGUST 2012 2.1 Signal Descriptions Table 2-1. Signal Descriptions TYPE DESCRIPTION I Input O Output I/O Input/output PD, PU Internal pull-down/pull-up PT Passive pass through P Power Supply G Ground 2.2 Clock and Reset Signals Table 2-2. Clock and Reset Signals TUSB8040A TUSB8020A SIGNAL TYPE PIN NO. PIN NO. DESCRIPTION NAME PFP RKM PFP RKM Global power reset. This reset brings all of the TUSB80x0A internal registers to their default states. When GRSTz is asserted, the device is completely GRSTz I, PU 33 A18 33 A18 nonfunctional. GRSTz should be asserted a minimum of 3 ms after all power rails are valid at the device. Crystal input. This terminal is the crystal input for the internal oscillator. The input XI I 76 A49 76 A49 may alternately be driven by the output of an external oscillator. When using a crystal a 1-M Ω feedback resistor is required between XI and XO. Crystal output. This terminal is crystal output for the internal oscillator. If XI is driven XO O 74 A48 74 A48 by an external oscillator this pin may be left unconnected. When using a crystal a 1- M Ω feedback resistor is required between XI and XO. Oscillator return. If using a crystal, the load capacitors should use this signal as the VSSOSC I 75 B45 75 B45 return path and it should not be connected to the PCB ground. If using an oscillator, this terminal should be connected to PCB Ground. 2.3 USB Upstream Signals Table 2-3. USB Upstream Signals TUSB8040A TUSB8020A SIGNAL NAME TYPE PIN NO. PIN NO. DESCRIPTION PFP RKM PFP RKM USB_SSTXP_UP O 62 B39 62 B39 USB SuperSpeed transmitter differential pair (positive) USB_SSTXM_UP O 63 A42 63 A42 USB SuperSpeed transmitter differential pair (negative) USB_SSRXP_UP I 66 A44 66 A44 USB SuperSpeed receiver differential pair (positive) USB_SSRXM_UP I 65 B40 65 B40 USB SuperSpeed receiver differential pair (negative) USB_DP_UP I/O 70 A46 70 A46 USB high-speed differential transceiver (positive) USB_DM_UP I/O 69 B42 69 B42 USB high-speed differential transceiver (negative) Precision resistor reference. A 9.09-k Ω ±1% resistor should be connected USB_R1 PT 78 A50 78 A50 between USB_R1 and USB_R1RTN. USB_R1RTN PT 79 B47 79 B47 Precision resistor reference return USB upstream port power monitor. The VBUS detection requires a voltage divider. The signal USB_VBUS must be connected to VBUS through a USB_VBUS I 73 B44 73 B44 90.9-k Ω ±1% resistor, and to ground through a 10-kΩ ±1% resistor from the signal to ground. Copyright © 2012, Texas Instruments Incorporated PIN DESCRIPTIONS 13 Submit Documentation Feedback Product Folder Links: TUSB8020A TUSB8040A |
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