hi
PLD AND FPGA all are comes under programmable device family
PLD is stand for programmable logic device
and fpga is for Field Programmable Logice Device
where as vhdl and verilog is hardware descriptive language
vhdl is very high speed hardware descriptive langauage
and verilog is hdl language
VHDL stands for VHSIC(Very High speed integrated circuit) HDL
HDL - Hardware description language.
If you want to program either a fpga or a cpld, start learning verilog or vhdl. the tools provided by the fpga or cpld vendor is quite easy to learn. all that it needs is a HDL file. Hope this helps.
to start in FPGA....u need to learn VHDL or Verilog....it doesn't matter which one u start with...one of them is even enough....
for PLD...u can start by CPLD for instance...and also u need a HDL (vhdl or verilog)
..u can get a small kit and do simple applications with it...then migrate to FPGA...and do more applications on a kit also....
VHDL primer is a good book to start....
there is also HDL chip design by Douglas smith (design, synthesis and simulation of ASICs and FPGAs using VHDL And verilog)
PLD - programable Logic Device
FPGA - Field Programmable Gate Array
VHDL- Very High Speed Hard Ware Discription Language.(also as VLSI HDL)
Verilog - Verify logic.
for learning VHDL you have to go through the LRM(Language Ref Manual or VHDL Book), feel free to contact .