Techniques for programming programmable logic array devices

The method of programming a programmable logic integrated circuit device from separate programming circuitry which includes programming data memory and a single clock signal circuit having a single oscillator circuit that is programmable to produce a clock signal having any of a plurality of frequencies, each frequency being suitable for use as a programming clock signal frequency by different ones of the programmable logic integrated circuit device, the method comprising:

• determining a one of the frequencies that is suitable for use as a programming clock signal frequency by the programmable logic integrated circuit device;
• programming the single clock signal circuit to produce the clock signal with said one of the frequencies;
• and
• applying programming data from the programming data memory to the programmable logic integrated circuit device in synchronism with the clock signal produced by the clock signal circuit at said one of the frequencies.