GS3241 datasheet(49/108 Pages) SEMTECH

49 / 108 page

GS3241

Final Data Sheet

Rev.2

PDS-061444

September 2017

49 of 108

Semtech

Proprietary & Confidential

www.semtech.com

4.7.6 Output State Control Modes

The GS3241 provides several output state control modes to meet specific application

requirements. The trace driver has the following three output modes: operational,

muted, or disabled. During non-sleep, if the control modes are configured such that

multiple output modes are enabled, the priorities of the control modes from highest to

lowest are the following: disabled, and then muted. Section 4.7.6.1 through

Section 4.7.7 describe how to configure the output control modes that are enabled

during non-sleep.

If the device enters sleep, either manually or automatically, the sleep output control

modes take precedence over the non-sleep control modes. The default trace driver

configuration is for it to be disabled during sleep; however the trace driver can be

configured to mute during sleep by setting the CFG_SLEEP_OUTPUT<n>_MUTE

parameter in register 0x5 to 1b.

4.7.6.1 Output Mute Control Mode

Each of the outputs on the GS3241 have independent mute control modes, which can

be configured through the host interface.

The following are the four output mute control modes:

1. The outputs automatically mute on LOS (default).

2. The outputs automatically mute on LOS and during rate search.

3. The outputs never mute.

4. The outputs are always muted.

The first mute control mode is the default power-up configuration for both output

drivers (the CTRL_OUTPUT<n>_AUTO_MUTE control parameter in register 0x49 is set

to 1b). In this mode, the outputs will automatically mute on the assertion of LOS. This

includes LOS as a result of setting up Squelch Adjust (see Section 4.2.1 for more details).

In addition to mute on LOS, with auto mute control mode configured, setting the

CTRL_OUTPUT<n>_AUTO_MUTE_DURING_RATE_SEARCH control parameter in

and begins to rate search.

Table 4-9: ΔVDDO (mVppd) and VCMOUT(V) vs. DS Setting and VCCO

ΔVDDO (mVppd) vs. DS Setting

DC-Coupled

VCMOUT (V) vs. DS Setting

AC-Coupled

VCMOUT (V) vs. DS Setting

Vcco (V)

1.2

200

400

—

1.15

1.1

—

1.1

—

1.8

200

400

800

1.75

1.7

1.6

1.7

1.6

1.4

2.5

200

400

800

2.45

2.4

2.3

2.4

2.3

2.1

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