GS6152 datasheet(28/80 Pages) SEMTECH

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GS6152

Final Data Sheet

Rev.2

PDS-060984

July 2015

28 of 80

Semtech

Proprietary & Confidential

www.semtech.com

The signals that can be input on the GPIOs are listed in Table 4-6 below.

By default, the GPIO pins are configured to the following parameters:

GPIO0: LOS (output)

GPIO1: LOCKED (output)

GPIO2: LBR_HBR (output)

GPIO3: DDO1_DISABLE (input)

Table 4-5: GPIO Status Outputs

GPIO[0:3]_SELECT

Parameter

Description

0000

LOS

Loss of signal indication - High when there is no detected

signal on the selected DDI input

0001

LOCKED

Phase lock indication - High when the CDR has

phase-locked to a valid input signal

0010

LBR_HBR

Low bit-rate/High bit-rate - High when the part is locked to

the SD data rate; low for all other data rates and in bypass.

0101

RATE_DET0

Rate Detect - Three bits used in conjunction that represent

the data rate detected by the rate search state machine.

Refer to Table 4-3 for rate encoding details.

0110

RATE_DET1

0111

RATE_DET2

1000

LOCKED_125M

High when the rate search state machine is locked to a

MADI data rate (125Mb/s)

1001

LOCKED_270M

High when the rate search state machine is locked to an SD

data rate (270Mb/s)

1010

LOCKED_1G485

High when the rate search state machine is locked to an HD

data rate (1.485Gb/s)

1011

LOCKED_2G97

High when the rate search state machine is locked to a 3G

data rate (2.97Gb/s)

1100

LOCKED_5G94

High when the rate search state machine is locked to a 6G

data rate (5.94Gb/s)

1101

RATE_CHANGE

When a change in the data rate is detected by the rate

search state machine, the RATE_CHANGE signal is pulsed

high for a duration of 37ns

Table 4-6: GPIO Signal Inputs

GPIO[0:3]_SELECT

Parameter

Description

0000

DDO0_DISABLE

Disables serial data output 0 (DDO0, DDO0)

0001

DDO1_DISABLE

Disables serial data output 1 (DDO1, DDO1)

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