Interfacing with HP-HIL

Jon Elson elson at
Sat May 7 14:05:54 CDT 2016

On 05/07/2016 12:35 PM, Chuck Guzis wrote:
> On 05/06/2016 10:26 AM, Paul Koning wrote:
>> I think a well chosen hearing aid tube can outperform a classic (not
>> L or LS) 7400 series IC.
> This application sound like a perfect candidate for a CPLD.
The Xilinx 9500 series of CPLDs are not low-power, by any 
means. They have a formula in the data sheet and a power 
calculator program, that are both WRONG!  They underestimate 
power by a factor of 3!!  I reported this to them, and they 
said I was right, but they were not going to fix the 
documentation!  Sheesh!

(The internal architecture is 36-input diode gates with 
pull-up resistors.  You have two choices of resistor, 
low-power and fast.)

The Xilinx CoolRunner II is quite low power, basically a 
CMOS FPGA architecture.


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