GS3590 datasheet(43/118 Pages) SEMTECH

43 / 118 page

GS3590

Final Data Sheet Rev.4



PDS-061414 September 2017

43 of 118

Semtech

Proprietary & Confidential

www.semtech.com

4.7 PRBS Generator

The GS3590 includes an integrated PRBS Generator which can produce a differential

PRBS7 or a divided clock signal on SDIO/SDO or DDO/DDO for system testing.

Note: The parameters referred to within this section are briefly described and linked to

their respective registers in Table 4-8.

•

The PRBS Generator and Checker can be active at the same time. However, the

Generator can not be looped-back on itself for error checking

Please consider the following before initializing the PRBS Generator for use:

•

Ensure that the directional mode setting is set to utilize the appropriate output.

Refer to Section 4.1.1 for more information:

 Cable Driver Mode PRBS output = SDIO/SDO

 Cable Equalizer Mode PRBS output = DDO/DDO

•

If the application requires adjustment to the default output swing on either PRBS

output, please see Section 4.8.5 for details on how to adjust these settings

To configure the PRBS Generator for use, please see the following steps:

1. Select the PRBS Generator as the source on the appropriate output:

 To switch DDO/DDO from data mode to PRBS generator mode, set

CTRL_OUTPUT1_SIGNAL_SEL = 1

 To switch SDIO/SDO from data mode to PRBS generator mode, set

CTRL_OUTPUT0_SIGNAL_SEL = 1

2. The default device settings are configured to power down the device on loss of

input signal. If the PRBS Generator is to be used without a valid input signal, then

the following automatic setting parameters must be disabled. This must be done to

ensure device is powered up and the outputs are active for the PRBS Generator.

The following settings are required for PRBS output on either output:

 CTRL_AUTO_SLEEP = 0

 CTRL_MANUAL_SLEEP = 0

The following settings are required when DDO/DDO is selected as PRBS

output:

 CTRL_OUTPUT1_AUTO_MUTE = 0

 CTRL_OUTPUT1_MANUAL_MUTE = 0

 CTRL_OUTPUT1_AUTO_DISABLE = 0

 CTRL_OUTPUT1_MANUAL_DISABLE = 0

The following settings are required when SDIO/SDO is selected as PRBS

output:

 CTRL_OUTPUT0_AUTO_MUTE = 0

 CTRL_OUTPUT0_MANUAL_MUTE = 0

 CTRL_OUTPUT0_AUTO_DISABLE = 0

 CTRL_OUTPUT0_MANUAL_DISABLE = 0

 CTRL_OUTPUT0_AUTO_SLEW = 0

GS3590 Datasheet(PDF) 43 Page - Semtech Corporation

GS3590 Datasheet(HTML) 43 Page - Semtech Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL