USB2512AI View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
USB2512AI Datasheet PDF : 57 Pages
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USB251xB/xBi
5.1.10 REGISTER 09H: NON-REMOVABLE DEVICE
Bit Number
7:0
Bit Name
NR_DEVICE
Description
Non-Removable Device: indicates which port has a non-removable device.
0 : port is removable
1 : port is non-removable
Bit 7 : rsvd
Bit 6 : rsvd
Bit 5 : rsvd
Bit 4 : controls port 4
Bit 3 : controls port 3
Bit 2 : controls port 2
Bit 1 : controls port 1
Bit 0 : rsvd
Note: The device must provide its own descriptor data.
When using the default configuration, the NON_REM[1:0] pins will designate
the appropriate ports as being non-removable.
5.1.11 REGISTER 0AH: PORT DISABLE FOR SELF-POWERED OPERATION
Bit Number
7:0
Bit Name
PORT_DIS_SP
Description
Port Disable Self-Powered: disables one or more ports.
0 = port is available
1 = port is disabled
Bit 7 : rsvd
Bit 6 : rsvd
Bit 5 : rsvd
Bit 4 : controls port 4
Bit 3 : controls port 3
Bit 2 : controls port 2
Bit 1 : controls port 1
Bit 0 : rsvd
During self-powered operation when mapping mode is disabled (PRTMAP_EN
= 0), this register selects the ports that will be permanently disabled. These
ports are then unavailable and cannot be enabled or enumerated by a host
controller. The ports can be disabled in any order, where the internal logic will
automatically report the correct number of enabled ports to the USB host. The
active ports will be reordered in order to ensure proper function.
When using the default configuration, PRT_DIS_P[x:1] and PRT_DIS_M[x:1]
pins disable the appropriate ports.
DS00001692C-page 24
2010 - 2015 Microchip Technology Inc.
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