USB MultiSwitchTM Hub
Datasheet
BIT |
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NUMBER | BIT NAME | DESCRIPTION |
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5 | PRT_ASSIGN_CFG | Port Assignment Configuration: |
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| ‘0’ = Port assignment is controlled by hardware interface pins |
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| ‘1’ = Port assignment is controlled by: |
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| PORT_ASSIGN_12 |
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| PORT_ASSIGN_34 |
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| PORT_ASSIGN_56 |
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| PORT_ASSIGN_7 |
4:3 | Reserved | Reserved, always = ‘0’. |
2:1 | LED_MODE | LED Mode Selection: The LED_A[4:1]_N and LED_B[4:1]_N pins support |
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| several different modes of operation (depending upon OEM implementation of |
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| the LED circuit). |
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| ‘00’ = USB Mode, (see USB Mode: on page 44 for description) |
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| ‘01’ = Host Ownership and Port Speed LED indicator, (see Host Ownership and |
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| Port Speed LED Indication: on page 45 for description) |
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| ‘10’ = Basic Host Ownership LED indicator, (see Basic Host Owner LED |
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| Indication: on page 44 for description) |
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| ‘11’ = Same as "00", USB Mode |
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| Warning: Do not enable an LED mode that requires LED pins that are not |
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| available in the specific package being used in the implementation! |
0 | STRING_EN | Enables String Descriptor Support |
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| ‘0’ = String Support Disabled |
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| ‘1’ = String Support Enabled |
BIT |
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NUMBER | BIT NAME | DESCRIPTION |
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7:0 | NR_DEVICE | |
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| devices. ‘0’ = port is removable, ‘1’ = port is non- removable. |
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| Informs the Host if one of the active ports has a permanent device that is un- |
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| detachable from the Hub. (Note: The device must provide its own descriptor |
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| data.) |
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| When using the internal default option, the NON_REM[1:0] pins will designate |
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| the appropriate ports as being non- removable. |
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| Bit 7= Reserved, always = ‘0’. |
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| Bit 6= Reserved, always = ‘0’. |
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| Bit 5= Reserved, always = ‘0’. |
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| Bit 4= 1; Port 4 is disabled. |
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| Bit 3= 1; Port 3 |
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| Bit 2= 1; Port 2 |
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| Bit 1= 1; Port 1 |
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| Bit 0 is Reserved, always = ‘0’. |
SMSC USB2524 | 25 | Revision 1.91 |
| DATASHEET |
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