A shift register lookup table , also shift register LUT or SRL , refers to a component in digital circuitry . It is essentially a shift register of variable length. The length of SRL is dynamically, if necessary. 
The SRL component is used in FPGA devices. The SRL can be used as a programmable delay element.
- Lookup table
- Shift register
- Jump up^ 16-Bit Shift Register Look-Up-Table (LUT) ArchivedMay 21, 2010, at theWayback Machine.
- Jump up^ Application note from Xilinxhttp://www.xilinx.com/support/documentation/application_notes/xapp465.pdf