Table 1-1: Pin Descriptions (Continued)
Pin Number
24, 25, 26
Name
SS[0:2]
Type
Bi-directional
Description
When AUTO/MAN is HIGH,
SS[0:2]
are outputs, displaying the data rate to
which the PLL has locked.
When AUTO/MAN is LOW,
SS[0:2]
are inputs, forcing the PLL to lock only to
a selected data rate
.
SS2
SS1
SS0
DATA RATE
SELECTED/FORCED
(Mb/s)
270
1483.5/1485
2967/2970
0
1
1
27
28
NC
LOCKED
No
Connect
Output
1
0
1
0
1
0
Not connected internally.
Lock Detect.
This pin is set HIGH by the device when the PLL is locked.
29
LOS
Output
Loss of
Signal.
Set
HIGH when there are no transitions on the active DDI[3:0] input.
30
VCC_DIG
Power
Most positive power supply connection for the internal glue logic.
Connect
to 3.3V.
31
VEE_DIG
Power
Most negative power supply connection for the internal glue logic.
Connect
to
GND.
33
SD/HD
Output
This signal will be set LOW by the device when the reclocker has locked to
2.97Gb/s (2.967Gb/s) or 1.485Gb/s (1.4835Gb/s), or when a non-SMPTE
standard is applied (i.e. the device is not locked).
It will be set HIGH when the reclocker has locked to 270Mbps.
34
35
KBB
RCO_MUTE
Analog Input
Power
Controls
the loop bandwidth of the PLL.
Serial
clock or secondary data output mute.
Assert LOW for reduced power consumption, see
When RCO_MUTE = LOW, the RCO/DDO1 output is powered down.
When RCO_MUTE = HIGH, the RCO/DDO1 output is active.
NOTE: This is not a logic input pin.
GS2975A HD-LINX® III Multi-Rate SDI Automatic
Reclocker with Dual Differential Outputs
Data Sheet
41487 - 4
April 2009
6 of 27
GENNUM [ GENNUM CORPORATION ]
