Philips ISP1520 User Manual download pdf (Page 9)

Philips Semiconductors

UM10014_4

ISP1520 Hi-Speed USB Hub Demo Board

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

C-Bus Interface

The ISP1520 can use either its USB descriptors from the internal ROM, or from an external I

C-

bus

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

Self-powered*

Ignore

J1 J2 Mode SCL SDA

ON ON

Internal ROM LOW LOW

OFF OFF

C-bus EEPROM* HIGH HIGH

1 2 3 4 5 6 7 8 9 10 ... 18

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Philips ISP1520 User Manual Page 9