USB2503-HZH Standard Microsystems Corp., USB2503-HZH Datasheet - Page 20

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

Revision 1.3 (08-24-04)
5.2.3.5
5.2.3.6
NUMBER
NUMBER
NUMBER
BIT
BIT
BIT
5:4
2:0
7:0
0
7
6
3
EEPROM Offset 7(h) - CONFIG_BYTE_2
EEPROM Offset 8(h) - Non-Removable Device
COMPOUND
NR_DEVICE
PORT_PWR
OC_TIMER
BIT NAME
BIT NAME
BIT NAME
DYNAMIC
Reserved
Reserved
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.
Dynamic Power Enable: Controls the ability for the Hub to transition to Bus-
Powered operation if the local power source is removed (can revert back to
Self-Power if local power source is restored).
0 = No Dynamic auto-switching.
1 = Dynamic Auto-switching capable.(Default)
Reserved
OverCurrent Timer: Over Current Timer delay.
00 = 0.1ms
01 = 2ms (Default)
10 = 4ms
11 = 6ms
Compound Device: Designates if Hub is part of a compound device.
0 = No. (Default)
1 = Yes, Hub is part of a compound device.
Reserved.
Non-Removable Device: Indicates which port(s) include non-
removable devices. ‘0’ = port is removable, ‘1’ = port is non-
removable.
Bit 7= Reserved
Bit 6= Reserved
Bit 5= Reserved
Bit 4= Reserved
Bit 3= 1; Port 3 non-removable.
Bit 2= 1; Port 2 non-removable.
Bit 1= 1; Port 1 non removable.
Bit 0 is Reserved, always = ‘0’.
15
DESCRIPTION
DESCRIPTION
DESCRIPTION
Integrated USB2.0 Compatible 3-Port Hub
SMSC USB2503
Datasheet