USING G540 PROGRAMMER SOFTWARE

USING G540 PROGRAMMER SOFTWARE

If you buy a low cost GAL programmer be carefull for software quality (available upgrades ? OS ?) and for exact supported references (prefix an 16V8 suffix are very important for programming). Eaysier than GAL, IMHO, for programming through Arduino : fewer pins to manage + no voltage to switch between 5V (Vcc) and 15V (Vpp) during programming + available and documented algorithms. You can get low cost 32 or 64 macrocells CPLD with ISP programming trough 4 JTAG pins (for instance : Atmel AFT1502, AFT1504 or Lattice M4A5-32/32 for about 2,5в‚¬ on Mouser site). The only mistake that you may have made that I can think of that will cause the problem you reported is to select the wrong device, the A at the end of the device name is very important when you.

The 16F628A is very similar to the 16F648A but has only 2K of flash. how is it possible ?ДЄll home made and commercial GAL programmers in 90s contained a small 5V to 15V DC converter (TL497 or 78S40 mainly) : see Galblast schematic or ELM's gal programmer Д¬ertainly the same with this programmer, no mystery !!Д¬PLD's seem to be programmed through a JTAG interface, which should be doable for the Arduino. Hi I have a G540 programmer and I have programed 16F628A and 16F84A, 16F877A ones. XAPP058 - Xilinx In-System Programming Using an Embedded Microcontroller ДЄnd it is just feeded with USB 5V-500mA. However, CPLD's seem to be programmed through a JTAG interface, which should be doable for the Arduino. (I've heard National and TI are pretty nice. But if you are convincing, some of the manufacturers will give you the information on a nondisclosure basis. Also expect as parts are redesigned to be faster, the old programming algorithms may be obselete, or have certain parameters in them shift. Expect most CMOS parts to have proprietary algorithms. So, starting around 1985, most manufacturers have removed this information from their databooks. Some of them don't want to spend a lot of money trying to figure out why you (and thousands others like you) can't get parts to program (or worse, stay programmed) using your homemade programmer. Some them make money by selling programmers and software.

'First, be aware that the manufacturers don't feel it's in their interest to give you enough information to build one. Programming GAL devices may be more difficult, from

Using g540 programmer