Altera IP Compiler for PCI Express Uživatelský manuál stáhnout pdf (Strana 147)

Chapter 5: IP Core Interfaces 5–61

Test Signals

August 2014 Altera Corporation IP Compiler for PCI Express User Guide

Test Interface Signals—Soft IP Implementation

Table 5–34 describes the test signals for the soft IP implementation.

Table 5–34. Test Interface Signals—Soft IP Implementation

Signal I/O Description

test_in[31:0]

The

test_in

bus provides runtime control for specific IP core

features. For normal operation, this bus can be driven to all 0's. The

following bits are defined:

[0]—Simulation mode. This signal can be set to 1 to accelerate

MegaCore function initialization by changing many initialization

count.

[2:1]—reserved.

[3]–FPGA mode. Set this signal to 1 for an FPGA implementation.

[4]—reserved.

[6:5] Compliance test mode. Disable/force compliance mode:

■ bit 0—completely disables compliance mode; never enter

compliance mode.

■ bit 1—forces compliance mode. Forces entry to compliance mode

when timeout is reached in polling.active state (and not all lanes

have detected their exit condition).

[7]–Disables low power state negotiation. When asserted, this signal

disables all low power state negotiation. This bit is set to 1 for Qsys.

[11:8]—You must tie these signals low.

[15:13]—selects the lane.

[32:16, 12]—reserved.

test_out[511:0]

[8:0]

for ×1 or ×4

test_out[127:0]

[8:0]

for ×8

The test_out bus allows you to monitor the PIPE interface When you

choose the 9-bit

test_out

bus width, a subset of the test_out

signals are brought out as follows:

■ bits[4:0] =

test_out[4:0]

on the ×8 IP core.

bits[4:0] =

test_out[324:320]

on the ×4/×1 IP core.

■ bits[8:5] =

test_out[91:88]

on the ×8 IP core.

bits[8:5] =

test_out[411:408]

on the ×4/×1 IP core.

The following bits are defined when you choose the larger bus:

■ [7:0]—

txdata

■ [8]—

txdatak

■ [9]—

txdetectrx

■ [10]—

txelecidle

■ [11]—

txcompl

■ [12]—

rxpolarity

■ [14:13]—

powerdown

■ [22:15]—

rxdata

■ [23]—

rxdatak

■ [24]—

rxvalid

■ [63:25]—reserved.

1 2 ... 142 143 144 145 146 147 148 149 150 151 152 ... 371 372

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