GS1560A/GS1561 Data Sheet
3.6.3 Slave Mode
The GS1560A/GS1561 is said to be in slave mode when the MASTER/SLAVE
input signal is set LOW. In this case, the four device pins listed in Master Mode on
page 36 become input control signals.
It is required that the application layer set the first three inputs to reflect the
appropriate input data format (SMPTE_BYPASS, DVB_ASI, and SD/HD). If just
one of these three is configured incorrectly, the device will not lock to the input data
stream, and the DATA_ERROR pin will be set LOW.
The fourth input signal, RC_BYP (GS1560A only), allows the application layer to
determine whether the serial digital loop-through output will be a reclocked or
buffered version of the input, Reclocker Bypass Control on page 34. Table 3-3
shows the required settings for various input formats.
Table 3-2: Master Mode Output Status Signals
PIN SETTINGS
FORMAT
SMPTE_BYPASS
DVB_ASI
SD/HD
RC_BYP
(GS1560A
only)
HD SMPTE
SD SMPTE
DVB-ASI
HIGH
HIGH
LOW
LOW
LOW
LOW
HIGH
LOW
LOW
HIGH
HIGH
HIGH
HIGH
LOW
HIGH
NOT SMPTE
OR DVB-ASI*
HIGH OR LOW
*NOTE: When the device locks to the data stream in PLL lock mode, the parallel outputs will be
latched LOW, and the serial loop-through output (GS1560A only) will be a buffered version of the
input.
Table 3-3: Slave Mode Input Control Signals
PIN SETTINGS
FORMAT
SMPTE_BYPASS
DVB_ASI
SD/HD
HD SMPTE
SD SMPTE
DVB-ASI
HIGH
HIGH
LOW
LOW
LOW
LOW
HIGH
LOW
LOW
HIGH
HIGH
NOT SMPTE OR
DVB-ASI*
HIGH OR LOW
*NOTE: See Data Through Mode on page 46 for a complete description of Data Through mode.
27360 - 8 September 2005
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