EVB-USB2517 SMSC, EVB-USB2517 Datasheet - Page 3

• Manufacturer Part Number: EVB-USB2517
• Description: Interface Modules & Development Tools Eval BRD USB2517
• Manufacturer: SMSC

Specifications of EVB-USB2517

• Product: Interface Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

EVB-USB2517 Evaluation Board User Manual (Revision A)
SMSC EVB-USB2517 Revision A
2 Hardware Configuration
2.1
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
Hardware Description
The EVB-USB2517 has one onboard regulator, which generates 3.3 volts from an external 5 volt power
supply. The USB2517 generates its own on-chip 1.8 volt supply. The internal 1.8 volt regulator to the
oscillator and the PLL is turned off during suspend to minimize suspend current. The USB2517 hub
consumes power from the 3.3 volt supply. Downstream port power is distributed by four power switches
(U1, U2, U6 and U7) that consume power from the 5 volt supply.
Port Assignment
Downstream ports are numbered one through seven with individual port power controllers. The port
power controllers provide 5 volts of power with over-current protection to the downstream devices.
Upstream and downstream port connectors have USB 2.0 compliant decoupling and a separate shield
ground.
Hub Configuration
Default: The EVB-USB2517 has been set up to support internal default configuration with no strapping
options enabled as determined by the state of CFG_SEL2, CFG_SEL1 and CFG_SEL0 pins
immediately after reset.
EEPROM Option: The EVB-USB2517 can load configuration from an external two-wire, I
U5. To enable this option, change the states of CFG_SEL2 and CFG_SEL1. Program and install an
EEPROM at U5. This option allows access to all of the configuration registers and ID strings for the
USB2517 device for detailed and desired functional analysis and exercise. The EVB-USB2517 is
compatible with I
bytes.
Port Power LEDs
LEDs 9,10,11,12,16,17, and 18 can be arranged to indicate when port power is available. This feature
is optional and consumes power in suspend mode. The recommendation is to leave this feature
unpopulated for low-cost and low-power implementations.
Hi-Speed Indicator LED
A red LED, LED14 or LED15 (depending on the strapping of HS_IND/CFG_SEL1), indicates when the
hub’s upstream port is connected at Hi-Speed.
Powered State LED
An optional LED, LED13, indicates when power is present.
2
C EEPROMs from several manufacturers. The minimum memory requirement is 256
USER MANUAL
3
Revision 1.2 (1-7-09)
2
C EEPROM