Philips user manual Schematics, Other Jumpers, 5.9.1.J13 NOOC, 5.9.2.J14 SUSPEND, UM10011_4

Philips Semiconductors	UM10011_4
	ISP1521 Hi-Speed USB Hub Demo Board

5.9.Other Jumpers

5.9.1.J13 (NOOC)

This jumper will set the OC capabilities in the hub’s descriptors (see Table 5-4).

Table 5-4: Overcurrent Support Selection Using J11 and J12

J13	NOOC	Logic State
OFF	No overcurrent support	1 (HIGH)
ON	Overcurrent support*	0 (LOW)

*—Default settings.

Note: this jumper is for setting the hub’s descriptor only. To inhibit the overcurrent detection, the OC pins must be tied to VCC (5 V)

5.9.2.J14 (SUSPEND)

This jumper is provided for debugging purposes. Logic 1 on the SUSPEND signal indicates that the hub is in the suspend mode. In the default setting jumper J14 is used (pulled down to GND).

Table 5-5: J14 Mode Setting

J14	Mode
OFF	Debugging purpose
ON	Normal mode (default)

6. Schematics

		© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
User manual	Rev. 04.00 — 17 June 2004	11 of 20