EPIC programmer: can program 16f877, but NOT 16f84....who has the solution?

[Darrel Taylor]

16F84 on a LAB-X1. (missed that the first time)

It can be done, but it takes some modifications.
Pretty much ruins the LAB-X1 too.

It is highly recommended that a PICmicro MCU with 40 pins, such as the
PIC16F877, be used with the LAB-X1. ... snip ...

However, it is possible to install a PICmicro MCU device with fewer pins and
then use jumpers to connect power, ground, oscillator inputs and I/O to the
proper pins for that device.

For example, to use the 18-pin PIC16F84 on the LAB-X1, first cut the traces
between the first 9 pads on headers P1 and P4 on the solder side of the
board. This will isolate the inner pads to the 40-pin ZIF socket from the
outer pads to the peripherals.

Next, solder in headers for P1 - P4. Jumper the outer Vdd, Vss, O1 and MCLR
posts to the proper inner posts to connect power, ground, the oscillator and
master clear to the PIC16F84. Refer to the PIC16F84 data sheet to determine
the correct PICmicro MCU pins.

Finally, jumper the desired peripherals to the PIC16F84 I/O pins. For
in-circuit programming through J3 to work properly, RB6 and RB7 on the
PIC16F84 must be connected to B6 and B7 on header P4.

Ugg!

[Archangel]

Hi Lucidan,
I use a JDM Clone, not an epic, BUT on my programmer, the 40 pin devices use all the places on the socket, for 18 pin devices you have to orient the chip 1 set of pins below the top of the socket and other devices similarly must be oriented differently, from the 18 pin devices, maybe your programmer is set up in a similar fashion.
JS

[Lucidan]

Thanks Darrel: "Pretty much ruins the LAB-X1 too." You're right:

"For example, to use the 18-pin PIC16F84 on the LAB-X1, first cut the traces
between the first 9 pads on headers.... "

They have got to be kidding...this is unbelievable. I'll just use Atmel devices for smaller applications. You can practically program those just by looking at them.