EVB-USB4640 SMSC, EVB-USB4640 Datasheet - Page 42

• Manufacturer Part Number: EVB-USB4640
• Description: EVALUATION BOARD FOR USB4640
• Manufacturer: SMSC

Specifications of EVB-USB4640

• Main Purpose: Interface, USB 2.0 Hub
• Embedded: *
• Utilized Ic / Part: USB4640
• Primary Attributes: *
• Secondary Attributes: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1107

Revision 1.0 (06-09-09)
8.4.4.8
8.4.4.9
BIT
BIT
BIT
4:3
2:1
7:6
5:4
2:0
7:4
0
3
E5h: Configuration Data Byte 2 (CFG_DAT_BYT2)
E6h: Configuration Data Byte 3 (CFG_DAT_BYT3)
CURRENT_SNS
COMPOUND
PORT_PWR
OC_TIMER
Reserved
Reserved
Reserved
Reserved
NAME
NAME
NAME
Reserved
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 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
Reserved
OverCurrent Timer: Over-current timer delay.
‘00’ = 50 ns
‘01’ = 100 ns
‘10’ = 200 ns
‘11’ = 400 ns
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:
‘0’ = No
‘1’ = Yes, the hub is part of a compound device
Reserved
Reserved
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.
DATASHEET
High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
42
DESCRIPTION
DESCRIPTION
DESCRIPTION
SMSC USB4640/USB4640i
Datasheet