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TUSB8020BPHPR Datasheet(PDF) 27 Page - Texas Instruments |
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TUSB8020BPHPR Datasheet(HTML) 27 Page - Texas Instruments |
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27 / 43 page  USB_SSTXP_UP USB_SSTXM_UP VBUS CAP_UP_TXM CAP_UP_TXP USB_SSRXP_UP USB_SSRXM_UP USB_DP_UP USB_DM_UP TUSB8020B U1A USB_DP_UP 26 USB_DM_UP 27 USB_SSTXM_UP 28 USB_SSTXP_UP 29 USB_SSRXM_UP 31 USB_SSRXP_UP 32 USB_VBUS 9 GANGED / SMBA2 / HS_UP 35 FULLPWRMGMTZ / SMBA1 / SS_UP 36 C1 10uF C3 0.1uF 0201 C4 0.1uF R3 4.7K 0402 5% J1 USB3_TYPEB_CONNECTOR VBUS 1 DM 2 DP 3 GND 4 SSTXN 5 SSTXP 6 GND 7 SSRXN 8 SSRXP 9 SHIELD0 10 SHIELD1 11 R5 1M 0402 5% R4 4.7K 0402 5% C5 0.001uF R2 10K 1% 0402 1% R1 90.9K 0402 1% C2 0.1uF 0201 TUSB8020B www.ti.com SLLSEF6A – JULY 2014 – REVISED JULY 2014 Typical Application (continued) 9.2.1 Design Requirements Table 25. Input Parameters DESIGN PARAMETER EXAMPLE VALUE VDD supply 1.1 V VDD33 supply 3.3 V Upstream port USB support (SS, HS, FS) SS, HS, FS Downstream port 1 USB support (SS, HS, FS, LS) SS, HS, FS, LS Downstream port 2 USB support (SS, HS, FS, LS) SS, HS, FS, LS Number of removable downstream ports 2 Number of non-removable downstream ports 0 Full power management of downstream ports Yes (FULLPWRMGMTZ = 0) Individual control of downstream port power switch Yes (GANGED = 0) Power switch enable polarity Active high (PWRCTL_POL = 0) Battery charge support for downstream port 1 Yes Battery charge support for downstream port 2 Yes I2C EEPROM support No 24-MHz clock source Crystal 9.2.2 Detailed Design Procedure 9.2.2.1 Upstream Port Implementation The upstream of the TUSB8020B is connected to a USB3 type B connector. This particular example has GANGED terminal and FULLPWRMGMTZ terminal pulled low, which results in individual power support each downstream port. The VBUS signal from the USB3 type B connector is fed through a voltage divider. The purpose of the voltage divider is to make sure the level meets USB_VBUS input requirements. Figure 27. Upstream Port Implementation Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback 27 Product Folder Links: TUSB8020B |
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