GS2972 Datasheet, PDF (17/125 Pages) Semtech Corporation – 3G/HD/SD-SDI Serializer with Complete SMPTE Audio & Video Support

Table 1-1: Pin Descriptions (Continued)
Pin
Number
Name
Timing
Type
H5
GRP2_EN/DIS
Input
H6
GRP1_EN/DIS
Input
H7
AUDIO_INT
Output
H8
JTAG/HOST
J4
AIN_5/6
J5
WCLK2
J6
AIN_1/2
J7
WCLK1
Input
Input
Input
Input
Input
Description
Enables Audio Group 2 embedding. Set HIGH to enable.
Please refer to the Input Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
Enables Audio Group 1 embedding. Set HIGH to enable.
Please refer to the Input Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
STATUS SIGNAL OUTPUT.
Please refer to the Output Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
Summary Interrupt from Audio Processing.
This signal is set HIGH by the device to indicate a problem with the
audio processing which requires the Host processor to interrogate
the interrupt status registers.
IO_VDD = +3.3V
Drive Strength = 8mA
IO_VDD = +1.8V
Drive Strength = 4mA
Note: By default, out of reset, the AUDIO_INT pin will output the
HD_AUDIO_CLOCK, rather than the audio interrupt signal. In order
to output the interrupt flags from the audio core as intended, the
user must write 0001h to register 0232h.
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 JTAG test mode or host interface mode.
When JTAG/HOST is HIGH, the host interface port is configured for
JTAG test.
When JTAG/HOST is LOW, normal operation of the host interface
port resumes and the separate JTAG pins become the JTAG port.
Serial Audio Input; Channels 5 and 6.
Please refer to the Input Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
48kHz Word Clock associated with AIN_5/6 and AIN_7/8 (channels 5,
6, 7 and 8).
Please refer to the Input Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
Serial Audio Input; Channels 1 and 2.
Please refer to the Input Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
48kHz Word Clock associated with AIN_1/2 and AIN_3/4 (channels 1,
2, 3 and 4).
Please refer to the Input Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
GS2972 3G/HD/SD-SDI Serializer with Complete
SMPTE Audio & Video Support
Final Data Sheet Rev. 9
GENDOC-047479 September 2013
www.semtech.com
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