system verilog testband for parallel to serial converter

#System verilog testband for parallel to serial converter manuals#
#System verilog testband for parallel to serial converter code#

The following table shows pin definitions for an 8-bit shift-left register with a positive-edge clock, synchronous set, serial in, and serial out.įollowing is VHDL code for an 8-bit shift-left register with a positive-edge clock, asynchronous parallel load, serial in, and serial out.įollowing is the Verilog code for an 8-bit shift-left register with a positive-edge clock, asynchronous parallel load, serial in, and serial out.Įndmodule 8-bit Shift-Left Register with Positive-Edge Clock, Synchronous Parallel Load, Serial In, and Serial Outįollowing is the VHDL code for an 8-bit shift-left register with a positive-edge clock, synchronous parallel load, serial in, and serial out.įollowing is the Verilog code for an 8-bit shift-left register with a positive-edge clock, synchronous parallel load, serial in, and serial out. Note Because this example includes an asynchronous clear XST will not infer SRL16.

The following table shows pin definitions for an 8-bit shift-left register with a negative-edge clock, clock enable, serial in, and serial out.įollowing is the VHDL code for an 8-bit shift-left register with a positive-edge clock, asynchronous clear, serial in, and serial out.įollowing is the Verilog code for an 8-bit shift-left register with a positive-edge clock, asynchronous clear, serial in, and serial out.Įndmodule 8-bit Shift-Left Register with Positive-Edge Clock, Synchronous Set, Serial In, and Serial Out Note For this example, XST will infer SRL16E_1. Signal tmp: std_logic_vector(7 downto 0) įollowing is the Verilog code for an 8-bit shift-left register with a positive-edge clock, serial in, and serial out.Įndmodule 8-bit Shift-Left Register with Negative-Edge Clock, Clock Enable, Serial In, and Serial Out The following figure shows the pin layout of SRL16E.įollowing is the VHDL code for an 8-bit shift-left register with a positive-edge clock, serial in, and serial out. Both are available with or without a clock enable. This is a way to convert data from a parallel format to a. In addition, parallel-in/ serial-out really means that we can load data in parallel into all stages before any shifting ever begins.

#System verilog testband for parallel to serial converter manuals#

Ĭonsult the VHDL/Verilog language reference manuals for more information.īefore writing Shift Register behavior it is important to recall that Virtex, Virtex-E, Virtex-II, and Virtex-II Pro have specific hardware resources to implement Shift Registers: SRL16 for Virtex and Virtex-E, and SRLC16 for Virtex-II and Virtex-II Pro. The parallel-in/ serial-out shift register stores data, shifts it on a clock by clock basis, and delays it by the number of stages times the clock period. predefined shift operators for example, sll, srl.There are different ways to describe shift registers. parallel: the contents of one or several of flip-flops other than the last one, is accessed.Following is the verilog code of Parallel Load Shift Left Register. Parallel Load Shift Left Register verilog code. This page covers Parallel Load Shift Left Register verilog code and test bench code of Parallel Load Shift Left Register. serial: only the contents of the last flip-flop is accessed by the rest of the circuit Parallel Load Shift Left Register verilog code.In general a shift register is characterized by the following control and data signals, which are fully recognized by XST: