USB4640 datasheet(43/64 Pages) SMSC

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High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller

Datasheet

SMSC USB4640/USB4640i

Revision 1.0 (06-09-09)

DATASHEET

8.4.4.10

E7h: Non-Removable Device

PRTMAP_EN

Port Mapping Enable: Selects the method used by the hub to assign port

numbers and disable ports.

‘0’ = Standard Mode. Strap options or the following registers are used to

define which ports are enabled, and the ports are mapped as port ‘n’ on the

hub is reported as port ‘n’ to the host, unless one of the ports is disabled,

then the higher numbered ports are remapped in order to report contiguous

port numbers to the host.

‘1’ = Port Map mode. The mode enables remapping via the registers defined

below.

2:0

Reserved

BIT

BYTE NAME

DESCRIPTION

7:0

NR_DEVICE

Indicates which port(s) include non-removable devices.

‘0’ = Port is removable

‘1’ = Port is non-removable

Informs the host if one of the active ports has a permanent device that is

undetachable from the hub. The device must provide its own descriptor data.

When using the internal default option, the NON_REM[1:0] pins will

designate the appropriate ports as being non-removable.

Bit 7= Reserved

Bit 6= Reserved

Bit 5= Reserved

Bit 4= Reserved

Bit 3= Controls physical port 3

Bit 2= Controls physical port 2

Bit 1= Controls physical port 1

Bit 0= Reserved

Note:

Bit 1 must be set to a ‘1’ by the firmware for proper identification of

the card reader as a non-removable device.

BIT

NAME

DESCRIPTION

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