Altera V-Series Avalon-MM DMA User Manual

Page 98

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Byte Offset

Register

Dir

Description

14'h0064

ltssm_reg[4:0]

O

Specifies the current LTSSM state. The LTSSM state

machine encoding defines the following states: :
• 5'b: 00000: Detect.Quiet

• 5'b: 00001: Detect.Active

• 5'b: 00010: Polling.Active

• 5'b: 00011: Polling.Compliance

• 5'b: 00100: Polling.Configuration

• 5'b: 00101: Polling.Speed

• 5'b: 00110: config.Linkwidthstart

• 5'b: 00111: Config.Linkaccept

• 5'b: 01000: Config.Lanenumaccept

• 5'b: 01001: Config.Lanenumwait

• 5'b: 01010: Config.Complete

• 5'b: 01011: Config.Idle

• 5'b: 01100: Recovery.Rcvlock

• 5'b: 01101: Recovery.Rcvconfig

• 5'b: 01110: Recovery.Idle

• 5'b: 01111: L0

• 5'b: 10000: Disable

• 5'b: 10001: Loopback.Entry

• 5'b: 10010: Loopback.Active

• 5'b: 10011: Loopback.Exit

• 5'b: 10100: Hot.Reset

• 5'b: 10101: LOs

• 5'b: 11001: L2.transmit.Wake

• 5'b: 11010: Speed.Recovery

• 5'b: 11011: Recovery.Equalization, Phase 0

• 5'b: 11100: Recovery.Equalization, Phase 1

• 5'b: 11101: Recovery.Equalization, Phase 2

• 5'b: 11110: recovery.Equalization, Phase 3

14'h0068

current_speed_reg[1:0]

O

Indicates the current speed of the PCIe link. The

following encodings are defined:
• 2b’00: Undefined

• 2b’01: Gen1

• 2b’10: Gen2

• 2b’11: Gen3

UG-01154

2014.12.18

Control Register Access (CRA) Avalon-MM Slave Port

5-29

Registers

Altera Corporation

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