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TUSB4041I-Q1 Datasheet(PDF) 19 Page - Texas Instruments |
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TUSB4041I-Q1 Datasheet(HTML) 19 Page - Texas Instruments |
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19 / 44 page  19 TUSB4041I-Q1 www.ti.com SLLSEK4B – JULY 2015 – REVISED JANUARY 2016 Product Folder Links: TUSB4041I-Q1 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated 8.5.9 Device Removable Configuration Register Offset = 7h Figure 10. Device Removable Configuration Register 7 6 5 4 3 2 1 0 customRmbl RSVD rmbl[3:0] RW-0 R-0 RW-X Table 11. Device Removable Configuration Register Field Descriptions Bit Field Type Reset Description 7 customRmbl RW 0 Custom removable This bit controls the ability to write to the port removable bits. 0 = rmbl[3:0] are read only, and the values are loaded from the OTP ROM. 1 = rmbl[3:0] are R/W and can be loaded by EEPROM or written by SMBus. This bit may be written simultaneously with rmbl[3:0]. 6:4 RSVD R 0 Reserved Read only, returns 0 when read 3:0 rmbl[3:0] RW X Removable The bits in this field indicate whether a device attached to downstream ports 4 through 1 are removable or permanently attached. 0 = The device attached to the port is not removable. 1 = The device attached to the port is removable. Each bit corresponds directly to a downstream port n + 1, For example: rmbl0 corresponds to downstream port 1, rmbl1 corresponds to downstream port 2, and so on. This field is read only unless the customRmbl bit is set to 1. Otherwise, the value of this field reflects the inverted values of the OTP ROM non_rmb[3:0] field. 8.5.10 Port Used Configuration Register Offset = 8h Figure 11. Port Used Configuration Register 7 6 5 4 3 2 1 0 RSVD used[3:0] R-0 RW-1 Table 12. Port Used Configuration Register Field Descriptions Bit Field Type Reset Description 7:4 RSVD R 0 Reserved Read only 3:0 used[3:0] RW 1 Used The bits in this field indicate whether a port is enabled. 0 = The port is disabled. 1 = The port is enabled. Each bit corresponds directly to a downstream port. For example: used0 corresponds to downstream port 1, used1 corresponds to downstream port 2, and so on. All combinations are supported with the exception of both ports 1 and 3 marked as disabled. |
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