This paper provides a tutorial survey of architectures of commercially available high-capacity field-programmable devices (FPDs). We first define the relevant terminology in the field and then describe the recent evolution of FPDs. The three main categories of FPDs are delineated: Simple PLDs (SPLDs), Complex PLDs (CPLDs) and Field-Programmable Gate Arrays (FPGAs). We then give details of the architectures of all of the most important commercially available chips, and give examples of applications of each type of device.
Stephen Brown and Jonathan Rose, "Architecture of FPGAs and CPLDs: A Tutorial," IEEE Design and Test of Computers, Vol. 13, No. 2, pp. 42-57, 1996.