AVR-Chat

----Original Message----
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