AVR-Chat

Thanks.   Just out of curiosity, do you know why Atmel didn't just call this
"ISP", with a clear section heading labeled such, like in many other data
sheets?   This is my first excursion into the Tiny's.  Is this
characteristic of Tiny's?   Steve

 

From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
Of Tim Mitchell
Sent: Monday, January 24, 2011 1:12 AM
To: AVR-Chat@yahoogroups.com
Subject: RE: [AVR-Chat] ISP for Tiny84

 

  

----Original Message----
From: AVR-Chat@yahoogroups.com <mailto:AVR-Chat%40yahoogroups.com> 
[mailto:AVR-Chat@yahoogroups.com <mailto:AVR-Chat%40yahoogroups.com> ] On
Behalf Of Steve Hodge
Sent: 23 January 2011 22:05 To: AVR-Chat@yahoogroups.com
<mailto:AVR-Chat%40yahoogroups.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





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