USB82640 datasheet(33/64 Pages) MICROCHIP

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DS60001312A-page 33

USB82640

7.3.3.18

E5h: Configuration Data Byte 2 (CFG_DAT_BYT2)

7.3.3.19

E6h: Configuration Data Byte 3 (CFG_DAT_BYT3)

Bit

Name

Description

7:6

rsvd

5:4

OC_TIMER

OverCurrent Timer: Over-current timer delay.

: 50 ns

: 100 ns

: 200 ns

: 400 ns

COMPOUND

Compound Device: Allows OEM to indicate that the hub is part of a com-

pound device per the USB 2.0 Specification [1]. The applicable port(s) must

also be defined as having a “non-removable device”.

When configured via strapping options, declaring a port as non-removable

automatically causes the hub controller to report that it is part of a compound

device.

: no

: yes, the hub is part of a compound device

2:0

rsvd

Bit

Name

Description

7:4

rsvd

PRTMAP_EN

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

numbers and disable ports.

: 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 num-

bers to the host.

: PortMap mode. The mode enables remapping via the registers defined

below.

2:0

rsvd

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