
Datasheet
BIT | FIELD NAME | DESCRIPTION |
3:0 | Port | Selects which ports are active. A one indicates that the port is |
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| |
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| Bit 3: Port 4 is |
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| Bit 2: Port 3 is |
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| Bit 1: Port 2 is |
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| Bit 0: Port 1 is |
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| All zeroes sets all ports active. |
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| Note: Active ports must be contiguous, and must start with port |
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| number 1. |
Table 8.4 - Address 8; Config_Byte_1
BIT | FIELD NAME | DESCRIPTION |
7 | Dynamic Power | Selects the ability to transition to |
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| power source is removed: |
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| 0: No dynamic |
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| 1: Dynamic |
6 | Selects the ability to support an OTG host: | |
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| 0: No OTG support. |
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| 1: OTG support enabled. |
5:4 | Reserved | Set to zero. |
3:0 | Selects the | |
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| active ports. |
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| 0101: delay is 2ms |
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| 1010: delay is 4ms |
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| 1111: delay is 6ms |
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| Note: All other values are reserved |
Table 8.5 - Addresses 9 - 11
BIT | FIELD NAME | DESCRIPTION |
7:0 | Max Power | Current in 2mA increments that the |
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| upstream port in this configuration. |
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| A value of 50, or 32(h), indicates 100 mA. |
7:0 | HubContrCurrent | Absolute maximum current requirement in 2mA increments of the |
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| hub controller electronics. |
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| A value of 50, or 32(h), indicates 100 mA. |
7:0 | PwrOn2PwrGood | Time in 2ms intervals from the time the power on sequence begins |
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| on a port until power is good on that port. |
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| A value of 50, or 32(h), indicates 100 ms. |
8.3Default Configuration Values
Default values for configuration data are loaded as described in section 8.1.2 and 8.1.3 above. The values programmed are summarized in Table 8.6 - Default Configuration Values.
SMSC USB20H04 | Page 23 | Revision 1.63 |
DATASHEET