GS1582-IBE3 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

GS1582-IBE3

Multi-Rate Serializer with Cable Driver, Audio Multiplexer and ClockCleaner™

Semtech Corporation 

NOTE: 8b/10b encoding will take place after K28.5 sync character insertion.

KIN should be set HIGH whenever the parallel data input is to be interpreted as any

special character defined by the DVB-ASI standard (including the K28.5 sync character).

This pin should be set LOW when the input is to be interpreted as data.

NOTE: When operating in DVB-ASI mode, DIN[9:0] are set to high impedance.

TS

8

FIFO

KIN

WRITE_CLK

<27MHz

READ CLK

=27MHz

CLK_IN FIFO_EMPTY

CLK_OUT

AIN ~ HIN

8

KIN

INSSYNCIN

PCLK = 27MHz

GS1582

SDO

SDO

Figure 4-9: DVB-ASI FIFO Implementation using the GS1582

4.5 Data-Through Mode

The GS1582 may be configured to operate as a simple parallel-to-serial converter. In this

mode, the device passes data to the serial output without performing any scrambling or

encoding.

Data-through mode is enabled only when both the SMPTE_BYPASS and DVB_ASI pins

are set LOW.

4.6 Standby Mode

In standby mode, the power consumption of the GS1582 is reduced to 125mW. Standby

mode is enabled when the STANDBY pin is set HIGH. Once the STANDBY pin is set

HIGH, it may take up to 50ms for power reduction to take place.

In this mode, the serial output pins are set to high impedance, and the GS1582 loses lock

to the reference input PCLK. While in standby mode, the programmed register values

are retained. However, no registers can be accessed for reading or writing via the GSPI

port. No write bits will be captured and all read functions will return a value of 0.

The power in standby mode can be further reduced through two means:

1. Eliminate activity on all parallel data and clock inputs. This can be achieved by

setting the parallel data and clock HIGH, or not driving them. Setting the parallel

inputs to LOW is not recommended as it will result in a smaller power saving.

2. Remove the 3.3V supply to the CD_VDD pin of the device.

The standby power consumption under various conditions is shown in Table 4-2:

Standby Power Consumption.

In order to return to normal operation from standby mode, the STANDBY pin must be set

to LOW. Once normal operation is resumed, the GS1582 will re-lock to the reference

GS1582 Multi-Rate Serializer with Cable Driver, Audio

Multiplexer and ClockCleanerTM

Data Sheet

40117 - 4

December 2011

36 of 115

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