USB 2.0 High-Speed 4-Port Hub Controller
Datasheet
4.3.1.29
Register FBh: Port Remap 12 (Reset 0x00)
BIT
NUMBER
BIT NAME
DESCRIPTION
DESCRIPTION
DESCRIPTION
7:0
PRTR12
Port remap register for ports 1 & 2.
4.3.1.30
Register FCh: Port Remap 34 (Reset = 0x00)
BIT NAME
BIT
NUMBER
7:0
PRTR34
Port remap register for ports 3 & 4.
4.3.1.31
Register FFh: Status/Command (Reset = 0x00)
BIT NAME
BIT
NUMBER
7:3
2
Reserved
Reserved
INTF_PW_DN
SMBus Interface Power Down
‘0’ = Interface is active
‘1’ = Interface power down after ACk has completed
1
0
RESET
Reset the SMBus Interface and internal memory back to RESET_N
assertion default settings.
‘0’ = Normal Run/Idle State
‘1’ = Force a reset of registers to their default state
USB_ATTACH
USB Attach (and write protect)
‘0’ = SMBus slave interface is active
‘1’ = Hub will signal a USB attach event to an upstream device, and the
internal memory (address range 00h-FEh) is “write-protected” to prevent
unintentional data corruption.
4.3.2
I2C EEPROM
The I2C EEPROM interface implements a subset of the I2C Master Specification (Please refer to the
Philips Semiconductor Standard I2C-Bus Specification for details on I2C bus protocols). The Hub’s I2C
EEPROM interface is designed to attach to a single “dedicated” I2C EEPROM, and it conforms to the
Standard-mode I2C Specification (100kbit/s transfer rate and 7-bit addressing) for protocol and
electrical compatibility.
Note: Extensions to the I2C Specification are not supported.
The Hub acts as the master and generates the serial clock SCL, controls the bus access (determines
which device acts as the transmitter and which device acts as the receiver), and generates the START
and STOP conditions.
SMSC USB2514
Revision 1.92 (05-08-07)
DATA3S1HEET
SMSC [ SMSC CORPORATION ]
