USB2504-JD Standard Microsystems Corp., USB2504-JD Datasheet - Page 20

• Manufacturer Part Number: USB2504-JD
• Description: Interface, Integrated USB2.0 Compatible 4-Port Hub
• Manufacturer: Standard Microsystems Corp.

Revision 1.3 (06-28-04)
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 1010xxx (where xxx is “don’t care”).
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
C
D
A
B
E
F
6
7
8
9
(BYTES)
SIZE
2
2
2
1
1
1
1
1
1
1
1
1
1
Table 5.1 User-Defined Descriptor Data
DEFAULT
0424
4-port =
2504
0000
98
90
00
00
00
01
64
01
64
32
(HEX)
SELF
CFG
DEFAULT
0424
4-Port =
2504
0000
1C
90
00
00
00
01
64
01
64
32
(HEX)
14
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 USB2.0 Compatible 4-Port Hub
DESCRIPTION
SMSC USB2504
Datasheet