GS3241 datasheet(36/108 Pages) SEMTECH

36 / 108 page

GS3241

Final Data Sheet

Rev.2

PDS-061444

September 2017

36 of 108

Semtech

Proprietary & Confidential

www.semtech.com

4.6 PRBS Generator

The GS3241 includes an integrated PRBS generator which can produce a differential

PRBS7 or a divided clock signal on either output for system testing.

Note: When working with the PRBS Generator, please note the following.

•

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.

•

If the application requires adjustments to the default output swing, please see

Section 4.7.4.

•

The parameters referred to within this section are linked to their respective

registers in Table 4-7. For a complete list of registers and functions, please see

Section 5.

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

 To switch DDO0/DDO0 from data mode to PRBS generator mode, set

CTRL_OUTPUT0_SIGNAL_SEL = 1

 To switch DDO1/DDO1 from data mode to PRBS generator mode, set

CTRL_OUTPUT1_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 generator on either output:

 CTRL_AUTO_SLEEP = 0

 CTRL_MANUAL_SLEEP = 0

The following settings are required when DDO1/DDO1 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 DDO0/DDO0 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

3. Set the values within the following parameters which meet the needs of the

application:

 CTRL_PRBS_GEN_SIGNAL_SELECT

 CTRL_PRBS_GEN_CLK_SRC

 CTRL_PRBS_GEN_DATA_RATE

GS3241 Datasheet(PDF) 36 Page - Semtech Corporation

GS3241 Datasheet(HTML) 36 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