USB 2.0
Datasheet
4.3.1.11Register 0Ah: Port Disable For Self Powered Operation
BIT |
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NUMBER | BIT NAME |
| DESCRIPTION |
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7:0 | PORT_DIS_SP | Port Disable | |
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| is available, ‘1’ = port is disabled. | |
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| During | |
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| (PRTMAP_EN='0'), this selects the ports which will be permanently disabled, | |
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| and are not available to be enabled or enumerated by a Host Controller. The | |
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| ports can be disabled in any order, the internal logic will automatically report | |
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| the correct number of enabled ports to the USB Host, and will reorder the | |
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| active ports in order to ensure proper function. | |
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| Bit 7= Reserved | |
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| Bit 6= Reserved | |
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| Bit 5= Reserved | |
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| Bit 4= 1; Port 4 | is disabled |
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| Bit 3= 1; Port 3 | is disabled |
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| Bit 2= 1; Port 2 | is disabled |
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| Bit 1= 1; Port 1 | is disabled |
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| Bit 0 is Reserved, always = ‘0’ | |
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4.3.1.12Register 0Bh: Port Disable For Bus Powered Operation
BIT |
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NUMBER | BIT NAME | DESCRIPTION |
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|
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7:0 | PORT_DIS_BP | Port Disable |
|
| is available, ‘1’ = port is disabled. |
|
| During |
|
| (PRTMAP_EN='0'), this selects the ports which will be permanently disabled, |
|
| and are not available to be enabled or enumerated by a Host Controller. The |
|
| ports can be disabled in any order, the internal logic will automatically report |
|
| the correct number of enabled ports to the USB Host, and will reorder the |
|
| active ports in order to ensure proper function. |
|
| When using the internal default option, the PRT_DIS[1:0] pins will disable the |
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| appropriate ports. |
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| Bit 7= Reserved |
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| Bit 6= Reserved |
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| Bit 5= Reserved |
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| Bit 4= 1; Port 4 is disabled |
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| Bit 3= 1; Port 3 is disabled |
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| Bit 2= 1; Port 2 is disabled |
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| Bit 1= 1; Port 1 is disabled |
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| Bit 0 is Reserved, always = ‘0’ |
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SMSC USB2514 | 25 | Revision 1.98 |
| DATASHEET |
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