RE: [AVR-Chat] ISP for Tiny84
2011-01-24 by Tim Mitchell
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From: AVR-Chat@yahoogroups.com
[mailto:AVR-Chat@yahoogroups.com] On Behalf Of Steve Hodge
Sent: 23 January 2011 22:05 To: AVR-Chat@yahoogroups.com
Subject: [AVR-Chat] ISP for Tiny84
> The data sheet for the Tiny84 does not explicitly mention
> "ISP" but I assume
> it can be done because the manual for my ISPMkII
> programmer says it supports
> the Tiny84 with ISP. Am I correct that the "Memory
> Programming" section of
> the data sheet is the relevant section and that I:
>
> -- leave the SPIEN fuse in its default programmed state
> ("SPI prog.
> enabled")
> -- pin "PA4 (ADC4/USCK/SCL/T1/PCINT4)" is the one that I
> connect to the "SCK" line of a standard 2x3 ISP header?
>
> The pins for the "MISO", "MOSI" and "RESET" connections
> to the header are
> pretty clear. It's just this "USCK" one that has me
> (slightly) perplexed.
> I just don't want to design a pcb without first
> confirming.
See p168 of the Tiny84 data sheet, there's a table there that tells you which pins to connect
MOSI PA6 I Serial Data in
MISO PA5 O Serial Data out
SCK PA4 I Serial Clock
--
Tim Mitchell