USB2504 SMSC Corporation, USB2504 Datasheet - Page 20

• Manufacturer Part Number: USB2504
• Description: Integrated USB 2.0 Compatible 4-Port Hub
• Manufacturer: SMSC Corporation

Revision 2.1 (12-06-06)
5.2.1.2
5.2.1.3
5.2.2
5.2.3
VID
PID
DID
Config Data
Byte 1
Config Data
Byte 2
Non
Removable
Device
Port Disable
Self-Powered
Port Disable
Bus-Powered
Max Power
Self-Powered
Max Power
Bus-Powered
Hub Controller
Max Current
Self-Powered
Hub Controller
Max Current
Bus-Powered
Power-On
Time
FIELD
Pull-Up Resistor
The Circuit board designer is required to place external pull-up resistors (10KΩ recommended) on the
SDA/SMBDATA & SCL/SMBCLK/CFG_SELO lines (per SMBus 1.0 Specification, and EEPROM
manufacturer guidelines) to Vcc in order to assure proper operation.
I2C EEPROM Slave Address
Slave address is 1010000.
Note: 10-bit addressing is NOT supported.
In-Circuit EEPROM Programming
The EEPROM can be programmed via ATE by pulling RESET_N low (which tri-states the Hub’s
EEPROM interface and allows an external source to program the EEPROM).
EEPROM DATA
BYTE
MSB:
LSB
1:0
3:2
5:4
A
B
C
D
E
6
7
8
9
F
(BYTES)
SIZE
2
2
2
1
1
1
1
1
1
1
1
1
1
Table 5.1 User-Defined Descriptor Data
0424
4-port =
2504
0000
98
90
00
00
00
01
64
01
64
32
DEFAULT
(HEX)
SELF
CFG
DATASHEET
0424
4-Port =
2504
0000
1C
90
00
00
00
01
64
01
64
32
DEFAULT
20
(HEX)
CFG
BUS
Vendor ID (assigned by USB-IF).
Product ID (assigned by Manufacturer).
Device ID (assigned by Manufacturer).
Configuration data byte #1 for Hub options.
Configuration data byte #2 for Hub options.
Defines the ports that contain attached
devices (this is used only when Hub is part of
a compound device).
Selects the ports that will be permanently
disabled
Selects the ports that will be permanently
disabled
Max Current for this configuration (expressed
in 2mA units).
Max Current for this configuration (expressed
in 2mA units).
Max Current (expressed in 2mA units).
Max Current (expressed in 2mA units).
Time until power is stable.
Integrated USB 2.0 Compatible 4-Port Hub
DESCRIPTION
SMSC USB2504/USB2504A
Datasheet