GS2972 Datasheet, PDF (19/125 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
K9
CS_TMS
Input
K10
SDIN_TDI
Input
Description
COMMUNICATION SIGNAL INPUT.
Please refer to the Input Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
Chip select / test mode start.
JTAG Test mode (JTAG/HOST = HIGH)
CS_TMS operates as the JTAG test mode start, TMS, used to control
the operation of the JTAG test, and is active HIGH (for new designs,
use the dedicated JTAG port).
Host mode (JTAG/HOST = LOW), CS_TMS operates as the host
interface Chip Select, CS, and is active LOW.
COMMUNICATION SIGNAL INPUT.
Please refer to the Input Logic parameters in the DC Electrical
Characteristics table for logic level threshold and compatibility.
Shared JTAG/HOST pin. Provided for pin compatibility with GS1582.
Serial data in/test data in.
In JTAG mode, this pin is used to shift test data into the device (for
new designs, use the dedicated JTAG port).
In host interface mode, this pin is used to write address and
configuration data words into the device.
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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