GC2011A datasheet(16/50 Pages) TI

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Texas Instruments Incorporated

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GC2011A 3.3V DIGITAL FILTER CHIP

SLWS129A

This document contains information which may be changed at any time without notice

By triggering on the TC strobe the user can guarantee that the snapshots are spaced by a known number of

samples. For example, the user can program the chip to capture blocks of 512 samples every 220 clocks. The blocks

can then be coherently combined to calculate accurate spectral information.

Once the snapshot has been triggered, the chip clears the START control bit. When the snapshot is finished

the chip will set the A_DONE or B_DONE bits in SNAP_REGC. NOTE that the delay from START being cleared to the

DONE bits being set can be up to 8192 clocks when the rate is every fourth clock and the trigger delay is set to 15.

The user accesses the snapshot as 256 16 bit words using addresses 256 to 511 in the chip’s control address

space. If the samples were stored as bytes, the results can either be read as two byte words, or be read as sign

extended bytes. If the user is reading bytes, then a control bit is used to select the upper or lower byte. The snapshot

memory is read-only by the user.

GC2011A Datasheet(PDF) 16 Page - Texas Instruments