Intel 21555 manual Switch Settings, Introduction, Switches

Introduction

1.4Switch Settings

Figure 2 shows the three initialization switch packs, and Table 1 on page 9 gives a high-level description of each switch. The switches are read at DE1B55503 power up. Further details on the operation of these switches can be found in Chapter 3, “Optional Configurations”. The switches are in dual-in-line (DIP) packs designated J9, J20, and J21. Each switch pack contains SW1 through SW5.

Figure 2. Switches

SLOT 2 J7

L1+

L2

J8 E9 J101

E8	SLOT 1
	J102
E7	OPTIONAL SLOT

Initialization
Switches			E5		Y1	J4	J6	J2
1	2	3	4	5		E3
J21
1	2	3	4	5	E4	E2		J5
J20					J1
1	2	3	4	5		21555
J9								E1

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8 21555 PCI-to-PCI Bridge Evaluation Board User’s Guide