Vpp and Vdd timing for some PICs

[Ron]

Hello,

When programming PIC like 16F84 and 16F876, is it possible to apply
Vpp (13V) and Vdd (5V) at the *same time* and still remain within
Microchip specifications?
I have to ask because I have a hard time interpreting Microchip data.

Thanks!

 

[Jan Panteltje]

On a sunny day (1 Jun 2004 05:07:57 -0700) it happened svhs400@yahoo.com (Ron)
wrote in <c048eed9.0406010407.6dab0cab@posting.google.com>:

Hello,

When programming PIC like 16F84 and 16F876, is it possible to apply
Vpp (13V) and Vdd (5V) at the *same time* and still remain within
Microchip specifications?
I have to ask because I have a hard time interpreting Microchip data.

Thanks!
Yes you have to have Vdd at +5V, and then raise Vpp from zero to +13V

to start the programming cycle.
Vpp is also !MCLR, so keep it at 5V in normal operation, 0V for reset.

For some flow chart see for example:
39589b.pdf
(enter it in www.google.com)
JP