Philips ISP1520 - Manual (Page 9)

Philips Semiconductors
UM10014_4
ISP1520 Hi-Speed USB Hub Demo Board
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
User manual Rev. 04.00 — 11 May 2004 9 of 18
Table 5-4: Power Mode Selection Using SW1
*—
Default
settings.
Figure 5-1: Windows Reporting of the Self-Powered Mode
5.6. I 2 C-Bus Interface
The ISP1520 can use either its USB descriptors from the internal ROM, or from an external I 2 C-
bus TM EEPROM or microcontroller. Mode selection is done through jumpers J1and J2 (see Table
5-5:).
Table 5-5: Mode Selection Using J1 and I2
*—Default settings.
SW1 Power Mode
S Self-powered*
B Ignore
J1 J2 Mode SCL SDA
ON ON
Internal ROM LOW LOW
OFF OFF I 2 C-bus EEPROM* HIGH HIGH