GS2970 Datasheet, PDF (15/145 Pages) Semtech Corporation – 3Gb/s, HD, SD SDI Receiver Complete with SMPTE Audio and Video Processing

Table 1-1: Pin Descriptions (Continued)
Pin
Number
H7
H8
J1, K1
J2
J3
J4
J5
J6, K6
K2
K3
K4
K5
Name
Timing
Type
Description
20bit/10bit
IOPROC_EN/DIS
SDO, SDO
SDO_EN/DIS
AOUT_1/2
ACLK
AOUT_5/6
XTAL2, XTAL1
STANDBY
AOUT_3/4
AMCLK
AOUT_7/8
Input
CONTROL SIGNAL INPUT
Please refer to the Input Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
Used to select the output bus width.
HIGH = 20-bit, LOW = 10-bit.
Input
CONTROL SIGNAL INPUT
Please refer to the Input Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
Used to enable or disable audio and video processing features.
When IOPROC_EN is HIGH, the audio and video processing features
of the device are enabled. When IOPROC_EN is LOW, the processing
features of the device are disabled, and the device is in a
low-latency operating mode.
Output
Serial Data Output Signal.
50Ω CML buffer for interfacing to an external cable driver.
Serial digital output signal operating at 2.97Gb/s, 2.97/1.001Gb/s,
1.485Gb/s, 1.485/1.001Gb/s and 270Mb/s.
Input
CONTROL SIGNAL INPUT
Please refer to the Input Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
Used to enable/disable the serial digital output stage.
When SDO_EN/DIS is LOW, the serial digital output signals, SDO and
SDO, are both pulled HIGH.
When SDO_EN/DIS is HIGH, the serial digital output signals, SDO and
SDO, are enabled.
Output
Serial Audio Output; Channels 1 and 2.
Output
64fs sample clock for audio.
Output
Serial Audio Output; Channels 5 and 6.
Analog Input Input connection for 27MHz crystal.
Input
CONTROL SIGNAL INPUT
Please refer to the Input Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
When this pin is set HIGH, the device is placed in a power-saving
mode. No data processing occurs, and the digital I/Os are powered
down.
In this mode, the serial digital output signals, SDO and SDO, are
both pulled HIGH.
Output
Serial Audio Output; Channels 3 and 4.
Output
Oversampled master clock for audio (128fs, 256fs, 512fs selectable).
Output
Serial Audio Output; Channels 7 and 8.
GS2970 3Gb/s, HD, SD SDI Receiver Complete with
SMPTE Audio and Video Processing
Data Sheet
47478 - 4
September 2012
15 of 145