--- pics with gate control of internal timer clock counting-

[asmboy]

I inherited a design with a 16f887 using the T1 gate function to get 2 us resolution for event time events using a sys clock of 16 mhz.

I'd like to improve the resolution to 1 us with an 18F part at 32 mhz , but find that this gating feature is not universally available.

(because of processing time requirements I can't simply jump the present prescalar setup down from /8 to /4 - as that already failed )

A search of the forum was not successful -
the microchip com web site 'java' interactive device selector was no help either.

Can anybody point me to a resource that clearly identifies parts WITH the
T1 ( or really ANY of the timers ) WITH the external gate feature ??

[PCM programmer]

One way would be to use Google. Search the Microchip website for the
following things: A PDF file for 18F with a T1G pin. Put in the TBLRD
instruction to make sure it doesn't return 16F or 12F results:

[asmboy]

i could not make ANY web or microchip search turn up a result ;-((

i only asked here - in case somebody knew offhand -
of any 18F , 5V parts that had T1G support

so i stated a microchip support ticket on it.

will share the results when i hear from m-chip on this question

A-B

[temtronic]

Any chance you could use another pin as the 'T1G' pin to control the timer on/off bit in the SFR ?
Just trying to think of options.....

[asmboy]

I also searched the collection of PDF's on the dozen 28 & 40 pin 18f's i've evaluated or used in a design. No luck there either - will wait and see what m-chip says.

[Ttelmah]

Did you actually 'try' PCM Programmers suggestion?.
It merrily returns 9 PIC18 chip data sheets, with the requirements. The very first one, 64MHz operation, gate control. The F version as opposed to the LF, runs to 5.5v max.
A good demo of how to actually _use_ Google....

Best Wishes

[temtronic]

It is amazing that Google can find the 'right stuff' FAST ! Now , if it'd show me WHERE I left my truck keys.......I'd be outta here !