Intel 21152 Jumpers, Secondary Slot Numbering and IDSEL Mapping, Jumper Connections, Introduction

Introduction

1.4Jumpers

The EB152 provides 10 jumpers that can be used for debugging and for special evaluation tests. The jumpers can be used for monitoring CLK signals and 21152 secondary PCI signals. Additional optional jumpers control secondary bus arbitration.

Table 1-1shows the connections required to allow observation of these signals at scope pod connector pins.

Table 1-1.	Jumper Connections
	Jumper	Description
	J1	This jumper monitors the following signals:
		p_clk (PCI clock)
		s_clk_o<4:1> (four secondary PCI clocks)
		s_clk_o<0> (fed back to the s_clk input pin)
		s_gnt_l<2> and s_gnt_l<3>.
	J2, J8 through J12	Logic analyzer pods can be plugged into these jumpers for
		monitoring 21152 secondary PCI signals.
	W1, W4, J7	These jumpers control secondary bus arbitration. Chapter 4, Secondary Bus
		Arbitration, provides information about configuring these jumpers.

1.5Secondary Slot Numbering and IDSEL Mapping

The PCI secondary bus option card slots are mapped to PCI device numbers 4, 5, 6, and 7 as shown in Figure 1-2. The secondary bus lines s_ad<20:23> are used as secondary IDSEL lines.

Figure 1-2. Secondary PCI Slot Numbering

PCI Device Numbers

4 5 6 7

PCI Option Card Slots

LJ-04468.AI4

21152 PCI-to-PCI Bridge Evaluation Board User’s Guide 1-3