At 08:13 21.11.96 +0100, you wrote:
>Could anybody explain to me why the program EEPROM on a 16c84 needs
>12-14V to be programmed when the data EEPROM can be written using normal
>voltage? It it two different types of EEPROM?
>- Kim

Hi Kim,

to my knowledge, the Vpp for 16C84 is only a "logic" signal, so you
would not erratically (re-)program the chip.
The 16C84 has an internal voltage-multiplier for the programming
voltage and draws almost no current from the Vpp-line.

Wolfram



+-----------------------------------------------------+
| Wolfram Liebchen                                    |
| Forschungsinstitut fŸr Optik, TŸbingen, Deutschland |
| mailto:liebchen@ffo.fgan.de                         |
+-----------------------------------------------------+