USB2503-HZH Standard Microsystems Corp., USB2503-HZH Datasheet - Page 27

• Manufacturer Part Number: USB2503-HZH
• Description: Interface, Integrated USB2.0 Compatible 3-Port Hub
• Manufacturer: Standard Microsystems Corp.

Integrated USB2.0 Compatible 3-Port Hub
Datasheet
SMSC USB2503
5.3.9.7
5.3.9.8
NUMBER
NUMBER
BIT
BIT
7:0
2:1
7
6
5
4
3
0
Register 06h: Device ID (MSB) (Reset = 0x00)
Register 07h: CONFIG_BYTE_1 (Reset = 0x00)
SELF_BUS_PWR
CURRENT_SNS
EOP_DISABLE
MTT_ENABLE
HS_DISABLE
PORT_PWR
PORT_IND
BIT NAME
BIT NAME
DID_MSB
Self or Bus Power: Selects between Self- and Bus-Powered operation.
0 = Bus-Powered operation.
1 = Self-Powered operation.
Note: If Dynamic Power Switching is enabled, this bit is ignored and the
SELF_PWR pin is used to determine if the hub is operating from self or bus
power.
Port Indicator Support: Indicates implementation of LED indicators
0 = No LED indicators.
1 = LED indicators.
High Speed Disable: Disables the capability to attach as either a High/Full-
speed device, and forces attachment as Full-speed only i.e. (no High-Speed
support).
0 = High-/Full-Speed.
1 = Full-Speed-Only (High-Speed disabled!)
Multi-TT enable: Enables one transaction translator per port operation.
0 = single TT for all ports.
1 = one TT per port (multiple TT’s supported)
EOP Disable: Disables EOP generation of EOF1 when in Full-Speed mode.
0 = EOP generation is normal.
1 = EOP generation is disabled.
Over Current Sense: Indicates whether current sensing is on a port-by-port
basis, or ganged.
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: Indicates whether port power switching is on a port-
by-port basis or ganged.
0 = Ganged switching (all ports together)
1 = Individual port-by-port switching.
Most Significant Byte of the Device ID.
22
DESCRIPTION
DESCRIPTION
Revision 1.3 (08-24-04)