USB MultiSwitchTM Hub
Datasheet
7.1.4.25
Register 92h-CFh: Serial String (Reset = 0x00)
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
SER_STR
Serial String, UNICODE UTF-16LE per USB 2.0 Specification
Maximum string length is 31 characters (62 Bytes)
Note:
The String consists of individual 16 Bit UNICODE UTF-16LE
characters. The Characters will be stored starting with the LSB at the
least significant address and the MSB at the next 8-bit location
(subsequent characters must be stored in sequential contiguous
address in the same LSB, MSB manner). Some EEPROM
programmers may transpose the MSB and LSB, thus reversing the
Byte order. Please pay careful attention to the Byte ordering or your
selected programming tools.
7.1.4.26
Register D0h: Port Interface Delay Timer (Reset = 0x00)
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
PRTDT
Port Delay Timer: A 0-255 bit value that represents a delay of 0-255ms from
the time a state change is detected on the PRT_ASSIGN[3:0] pins until the
internal logic begins the port switching process for the affected port (or ports)
to a different upstream host.
Note:
This register effectively creates a programmable debounce circuit for
mechanical switches that may be connected to the PRT_ASSIGN[3:0]
interface pins.
7.1.4.27
Register D1h: Port Assign Interface Configuration 0A (Reset = 0x00)
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
PORT_INT_0A
Port Assign Interface 0A: Determines the configuration of the hardware
interface configuration for the assignment of ports 1 & 2 to upstream hosts.
Bit [7:4] = ‘0000’ Port 2 is unassigned
‘0001’ Port 2 owned by UP1
‘0010’ Port 2 owned by UP2
‘0011’ Reserved, will default to ‘0001’ value
to
‘1111’
Bit [3:0] = ‘0000’ Port 1 is unassigned
‘0001’ Port 1 owned by UP1
‘0010’ Port 1 owned by UP2
‘0011’ Reserved, will default to ‘0001’ value
to
‘1111’
SMSC USB2524
Revision 1.91 (08-22-07)
DATA2S9HEET
SMSC [ SMSC CORPORATION ]
