 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
SH7721 Datasheet(PDF) 849 Page - Renesas Technology Corp |
|
|
|||||||||||||||||||||||||||||
SH7721 Datasheet(HTML) 849 Page - Renesas Technology Corp |
|
|
849 / 1524 page  Section 24 USB Host Controller (USBH) Rev. 3.00 Jan. 18, 2008 Page 787 of 1458 REJ09B0033-0300 24.3.19 Hc Rh Descriptor A Register (USBHRDA) USBHRDA is the first register of two registers describing the features of the root hub. The reset value is implementation specific. The descriptor length (11), descriptor type (TBD), and the hub controller current bit (0) of Class Descriptor of the hub are emulated by HCD. All other bits are placed in USBHRDA and USBHRDB. Bit Bit Name Initial Value R/W Description 31 30 29 28 27 26 25 24 POTPGT7 POTPGT6 POTPGT5 POTPGT4 POTPGT3 POTPGT2 POTPGT1 POTPGT0 0 0 0 0 0 0 1 0 R/W R/W R/W R/W R/W R/W R/W R/W Power On To Power Good Time These bits specify the time required for waiting before accessing the power-on port of the root hub. These bits are implementation specific. The unit of time is 2 ms. The time is calculated as POTPGT × 2 ms. 23 to 13 All 0 R Reserved These bits are always read as 0. The write value should always be 0. 12 NOCP 1 R/W No Over Current Protection This bit selects how the over-current status of the root hub is reported. When this bit is cleared, the OCPM bit specifies global report or report at each port. 0: Over-current status is collectively reported for all downstream ports 1: Over-current protection is not supported 11 OCPM 0 R/W Over Current Protection Mode This bit selects how the over-current status in the root-hub port is reported. At reset, this bit reflects the same mode of PowerSwitchingMode. When the NOCP bit is cleared, this bit is valid. 0: Over-current status is collectively reported for all downstream ports 1: Over-current protection is not supported 10 DT 0 R Device Type This bit indicates that the USB Host Controller is not a compound device. Always set this bit to 0. |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
