DS64BR401EVK - TEXAS INSTRUMENTS

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DS64BR401EVK User Guide

SATA/SAS MiniSAS4X Cable Extender Demo Kit

General Description:

The DS64BR401EVK – miniSAS4X cable extender demonstration kit provides a complete cable

extension solution using National’s DS64BR401 – Quad Bi-directional Cable/Backplane Extender with

Equalization and De-emphasis.

MiniSAS4X right angle I-PASS Molex receptacle connectors are used as the input and the output

connections for SATA/SAS disk drive storage application. Adaptor board which provides connection

from mini SAS4X (26-pin external) to mini SAS4Xi (36-pin internal) is provided to allow easy straight

forward connection to existing hardware.

Features:

• Quad lane bi-directional transceiver up to 6.4 Gbps rate

• Signal conditioning on input and output for extended reach

• Adjustable receive equalization up to +33 dB gain

• Adjustable transmit de-emphasis up to −12 dB

• Adjustable transmit VOD (600 mVp-p to 1200 mVp-p)

• <0.25 UI of residual DJ at 6.4 Gbps with 40” FR4 trace

• Automatic de-emphasis scaling based on rate detect

• SATA/SAS: OOB signal pass-through,

<3 ns (typ) envelope distortion

• Adjustable electrical IDLE detect threshold

• Low power (100 mW/channel), per-channel power down

• Programmable via pin selection or SMBus interface

• Single supply operation at 2.5V ±5%

• >6 kV HBM ESD Rating

• 3.3V LVCMOS input tolerant for SMBus interface

• High speed signal flow–thru pinout package: 54-pin LLP

(10 mm x 5.5 mm)

Applications:

• SATA (1.5 Gbps / 3.0 Gbps / 6.0 Gbps)

• SAS (3.0 Gbps / 6.0 Gbps)

DS64BR401EVK Demo Kit Contents:

• End User License Agreement

• DS64BR401EVK User Guide Rev.1.7

• DS64BR401 Datasheet

• DS64BR401 MiniSAS4X Demo Board REV.2

• MiniSAS4X Connector Adaptor Board (EXT to INT) REV.2

Ordering Information:

Device: DS64BR401SQ

SATA/SAS miniSAS4X Cable Extender Demo Kit: DS64BR401EVK

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Figure 1. DS64BR401EVK Evaluation Board

Figure 2. MiniSAS4X Connector Adaptor Board (EXT to INT)

CON1, CON2

miniSAS4X (EXT)

Right Angle

Connector

J5 – Jumper Setting

EQA, RATE, VOD

and TXIDLEA/B

J4 – Jumper Setting

DEMA/B, PDWN, EQA

J3 – SMBus Access J1 – VIN (> 3.0V)

DS64BR401SQ

J2 – VDD = 2.5V

CON3

miniSAS4X (EXT)

Right Angle

Connector

CON4

miniSAS4Xi (INT)

Right Angle

Connector

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Typical Repeater Application:

Quick Start Guide:

1. Connect > 3.0V DC power to J1. Measure 2.5 V on J2.

2. Attach two mini SAS4X external cables to the board. If cable is not the 4X external (26-pin) then use the

adaptor board to convert to mini SAS4Xi (36-pin internal) connector.

3. Set EQ and DE level according to the length of the inter-connect media.

Connection and Control Description

Component Name Function

J1 PWR

DC Power - VIN to Low Drop-out Regulator - VIN > 3.0V.

J2 PWR

DC Power - VOUT of Low Drop-out Regulator – fixed 2.5V.

J3 ENSMB, SCL, SDA Optional SMBus access pins.

See datasheet for additional information.

J4 DEM, EQ and

/PWDN

Control pins for De-emphasis, Equalizer and Power-down.

J5 EQ, RATE, VOD

and TXIDLE pins

Control pins for Equalizer, Rate Select, Output VOD levels and

TX output.

CON1 miniSAS4X

Connector Molex mini SAS4X (ext) right angle receptacle connector.

CON2 miniSAS4X

Connector Molex mini SAS4X (ext) right angle receptacle connector.

CON3 miniSAS4X

Connector

Adaptor board with Molex mini SAS4X (EXT) right angle

receptacle connector.

CON4 miniSAS4Xi

Connector

Adaptor board with Molex mini SAS4Xi (INT) right angle

receptacle connector.

J1, J2 – Power Connection

VIN (>3.0V) on J1 is needed for power. The LP38690 – 1A Low Dropout Linear Regulator is used to provide fixed

2.5V. J2 is available to allow access to the 2.5V supply. When by-passing the LP38690, the RS1 (0.01 ohm)

should be removed and a 2.5V external supply can be connected to J2.

J3 – SMBus Access

J3 is used to access the SMBus to configure the DS64BR401. ENSMB should be tied low for external pin control.

When ENSMB is tied high, SCL (clock input) and SDA (data input/output) are enabled.

J4, J5 – Control Pins

Jumpers should be used to tie the control pins to 1-high (VDD), 0-low (GND) or F-float (NC). The EQA, EQB,

DEMA, DEMB, TXIDLEA, TXIDLEB and RATE are 3-level inputs. The PWDN is used to enable and disable the

mini SAS4X (external)

mini SAS4Xi (internal)

Optional Adaptor Board

miniSAS4X (EXT to INT)

Optional Adaptor Board

miniSAS4X (EXT to INT)

SATA/SAS Disk Drive SATA/SAS Host Controller

DS64BR401EVK

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device. PWDN should be tied low (GND) for normal operation. The VOD[1:0] are used to set the output amplitude

voltage level. Please refer to the tables below for detail information.

Equalization Control Pins (EQA/EQB)

EQA/B0 EQA/B1 Equalization Level Recommend Media Length

F F Off Bypass

1 1 5.8 dB at 3 GHz 8 inch FR4 or 0.7 meter (30AWG) cable

0 0 9 dB at 3 GHz 12 inch FR4 or 1 meter (30AWG) cable

0 F 11.7 dB at 3 GHz 20 inch FR4 or 5 meter (30AWG) cable

0 1 14.6 dB at 3 GHz 25 inch FR4 or 6 meter (30AWG) cable

1 F 18.4 dB at 3 GHz 35 inch FR4 or 9 meter (30AWG) cable

1 0 20 dB at 3 GHz 40 inch FR4 or 10 meter (30AWG) cable

F 0 21.2 dB at 3 GHz 10 meter (30AWG) cable

F 1 28.4 dB at 3 GHz 12 meter (30AWG) cable

De-emphasis Control Pins (DEMA/DEMB)

DEMA1/B1 DEMA0/B0 De-emphasis Level VOD Level

0 0 0 dB VOD: 600 mV to 1200 mV

0 1 -3.5dB VOD = 1000 mV

0 1 -2 dB VOD = 1200 mV

1 0 -6 dB VOD = 1000 mV

1 0 -3 dB VOD = 1200 mV

1 1 -9 dB enhanced VOD = 1000 mV

1 1 -11 dB enhanced VOD = 1200 mV

0 F -6 dB enhanced VOD = 1000 mV

0 F -8 dB enhanced VOD = 1200 mV

1 F -12 dB enhanced VOD = 1000 mV

1 F -13 dB enhanced VOD = 1200 mV

F 0 -9 dB enhanced VOD = 1000 + 200 mV

F 0 -10 dB enhanced VOD = 1200 + 200 mV

F 1 -12 dB enhanced VOD = (1000 to 1200 ) + 200 mV

F F Reserved, don’t use

Rate Control Pi ns (RATE)

RATE Functional Description

0 Set the De-emphasis pulse width duration for 3 Gbps (low rate)

1 Set the De-emphasis pulse width duration for 6 Gbps (high rate).

F Enables the auto rate select function.

TX Output Control Pins (TXIDLEA/TXIDLEB)

TXIDLEA/B Functional Description

0 Disables the signal detect/squelch function for all outputs A or B.

1 Forces all outputs to be muted (electrical idle).

F Enables the signal detect/squelch function for all channels.

Signal detect voltage level threshold can be adjusted with an external resistor on the SD_TH

pin to GND. Default level is 130 mVp-p when SD_TH is floating.

Please refer to the Table 4 in the datasheet for typical resistor value.

Output Voltage Amplitude Level (VOD)

VOD1 VOD0 Functional Description

0 0 Output VOD = 600 mVp-p

0 1 Output VOD = 800 mVp-p

1 0 Output VOD = 1000 mVp-p

1 1 Output VOD = 1200 mVp-p

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Figure 3. DS64BR401EVK Equalization Test Se tup

DS64BR401 Equalization Performance with 5m 26AWG cable at 6 Gbps:

TP0 – INPUT (after 5m) TP1 – OUTPUT (after 1m)

VOD = 1.0 Vp-p, PRBS7 DS64BR401 setup condition:

EQ[1:0] = F0 (~11.7 dB at 3 GHz)

DEM[1:0] = 01 (-2 dB with VOD = 1.2 Vp-p)

DS64BR401 Equalization Performance with 10m 24AWG cable at 6 Gbps:

TP0 – INPUT (after 10m) TP1 – OUTPUT (after 1m)

VOD = 1.0 Vp-p, PRBS7 DS64BR401 setup condition:

EQ[1:0] = 01 (~20 dB at 3 GHz)

DEM[1:0] = 01 (-2 dB with VOD = 1.2 Vp-p)

TP1

Agilent

N4903A

J-BERT

Agilent

86100C

DCA-J

1m iPASS

TP0

DS64BR401

10m

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Figure 4. DS64BR401EVK De-emphasis Test Setup

DS64BR401 De-emphasis with 5m 26AWG cable at 6 Gbps:

TP0 – INPUT (after 1m) TP1 – OUTPUT (after 5m)

VOD = 1.0 Vp-p, PRBS7 DS64BR401 setup condition:

EQ[1:0] = 11 (~5.8 dB at 3 GHz)

DEM[1:0] = F0 (-10 dB with VOD = 1.4 Vp-p)

DS64BR401 De-emphasis with 10m 24AWG cable at 6 Gbps:

TP0 – INPUT (after 1m) TP1 – OUTPUT (after 10m)

VOD = 1.0 Vp-p, PRBS7 DS64BR401 setup condition:

EQ[1:0] = 11 (~5.8 dB at 3 GHz)

DEM[1:0] = F1 (-12 dB with VOD = 1.4 Vp-p)

TP1

Agilent

N4903A

J-BERT

Agilent

86100C

DCA-J

10m

TP0

DS64BR401

1m iPASS

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Scope plots of OOB (out of band) signal through the DS64BR401:

Idle to Active Response Time: ~ 4.6 ns

Active to Idle Response Time: ~ 6.7 ns

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Bill of Materials:

DESIGNATION QTY DESCRIPTION

CON1,CON2,CON3 3 Molex - 75586-0009: CONN RCPT 26POS IPASS RT ANG SMD,

Molex - 74548-0211: CONN IPASS SAS 1X1 GUIDE FRAME

CON4 1

Molex - 75783-0140: CONN RCPT 36POS IPASS RT ANG SMD

C1,C2 2

CAP CERAMIC 1UF 10V X5R 0402

C3,C4,C5,C6,C7,C8,C9,C10,

C11,C12,C13,C14,C15,C16,

C17,C18,C19,C20,C21,C22,

C23,C24,C25,C26,C27,C28,

C29,C30,C31,C32,C33,C34

32 CAP .01UF 6.3V CERAMIC X5R 0201

C35,C36,C37,C38,C39 5 CAP CERAMIC .1UF 6.3V X5R 0201

J1, J2 2 HEADER 1x2

J3 1 HEADER 1x4

J4 1 HEADER 3x7

J5 1 HEADER 3x8

RS1 1 RESISTOR 0.01 OHM 1/4W 1% 0805

R1,R2,R3,R4 4 NA – Only needed for special circumstance

U1 1 DS64BR401

U2 1 LP38692SD-2.5_LLP IC REG LDO 1A 2.5V 6-LLP

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Schematic:

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FAB/Manufacture Information:

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Document ID: DS64BR401EVK User Guide

Date: June 25, 2009

Rev: 1.7

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