"ian field" wrote in message
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"oppie" wrote in message
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"ian field" wrote in message
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"oppie" wrote in message
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aifk the type of clock is spec'ed in the 'configuration bits' section
of MPLAB. There is a default clock that is initially used and this
depends on the target device (also specified in MPLAB). Past that, the
download is synchronous so the clock is not initially important just as
long as there is one.

Perhaps a better way of phrasing my question - is the PGC clock supplied
by the ICSP interface sufficient on its own during programming, or does
an external clock have to be provided in the absence of an internal
clock generator?

You need some sort of clock running on the micro in order to do
anything - including ICSP.
Default clocks can be anything from an onboard RC oscillator to the
external crystal osc - varies from device to device and families. Check
the datasheet for the chip in question as to start-up oscillator
configurations.
What device are you planning to use?

Most likely 16f84 since that is what I've found the most tutorials for.

The 16F84 should still be available but it's recommended to use the newer
'A' Version
http://www.microchip.com/stellent/id...ame =en010230

The ICSP spec should give you enough information on the basics:
http://ww1.microchip.com/downloads/e...Doc/30277d.pdf
See page 33 for information specific to the 16F8x parts.

Most of my work has been with the 18F series and we just set the processor
up with a 4 mhz crystal and the ICSP header at miinum. Connect up the ICD2 =
you can program and debug through the MPLAB IDE.
===============
I just checked the ICD2 and it does not support your device. Take a look at
the 18F series instead, They're a newer series and better supported. Should
be about the same cost. The ICD is a neat programing/debug tool to use and I
would try to select a part that is supported by it.

The MPLAB ICD 2 currently supports most PIC and dsPIC
Flash microcontrollers. Flash PICmicro MCU's not
supported are PIC16F72/73/74/76/77/83/84A.