USB4640 datasheet(42/64 Pages) SMSC

42 / 64 page

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

Datasheet

Revision 1.0 (06-09-09)

SMSC USB4640/USB4640i

DATASHEET

8.4.4.8

E5h: Configuration Data Byte 2 (CFG_DAT_BYT2)

8.4.4.9

E6h: Configuration Data Byte 3 (CFG_DAT_BYT3)

4:3

Reserved

2:1

CURRENT_SNS

Over-Current Sense: Selects current sensing on a port-by-port basis, all

ports ganged, or none (only for bus-powered hubs). The ability to support

current sensing on a per port or ganged basis is dependent upon the

hardware implementation.

‘00’ = Ganged sensing (all ports together)

‘01’ = Individual (port-by-port)

‘1x’ = Over-current sensing not supported (must only be used with bus-

powered configurations!)

PORT_PWR

Port Power Switching: Enables power switching on all ports simultaneously

(ganged), or port power is individually switched on and off on a port-by-port

basis (individual). The ability to support power enabling on a port or ganged

basis is dependent upon the hardware implementation.

‘0’ = Ganged switching (all ports together)

‘1’ = Individual port-by-port switching

BIT

NAME

DESCRIPTION

7:6

Reserved

5:4

OC_TIMER

OverCurrent Timer: Over-current timer delay.

‘00’ = 50 ns

‘01’ = 100 ns

‘10’ = 200 ns

‘11’ = 400 ns

COMPOUND

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

compound device (per the USB 2.0 Specification). The applicable port(s)

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

Note:

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.

‘0’ = No

‘1’ = Yes, the hub is part of a compound device

2:0

Reserved

BIT

NAME

DESCRIPTION

7:4

Reserved

BIT

NAME

DESCRIPTION

USB4640 Datenblatt(PDF) 42 Page - SMSC Corporation

USB4640 Datenblatt(HTML) 42 Page - SMSC Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

Datenblatt Download

Link URL