328P datasheet

[NMNeil]

Due to ignorance and not taking sufficient time I've managed to brick an Atmega328, well a couple of them actually.
Of course there are various commercial and DIY fuse doctor programmers on the web, but just copying and pasting Arduino code doesn't help me learn anything. So I decided to write my own program for the ATTiny 2313. Simply because I have plenty and it would be a great C programming learning experience.
Looking at the 328P datasheet for high voltage parallel programming, page 300 gives a nice diagram of how to physically wire the 328p up.
Now my question.
Is the data pinout read right to left, or left to right. By that I mean the sheet says PC(1:0) : PB(5:0)
So are the data pins read as PC0(0), PC1(1), PB0(2) to PB5(7).
or is it PB0(0) to PB5(5) then PC0(6), PC1(7)?
It's got me stumped.

 

[Harald Kapp]

Which datasheet do you refer to? This one clearly shows the location of each pin starting on page 14.

 

[(*steve*)]

Find a programmer that interfaces via the 6 pin connector on the arduino (or the 6 pins if you're using a bare chip) and most of your bucking problems will go away.

It is always possible to set it up so you need high voltage programming, but unless you're careless the in circuit programming will work even if you've broken the boot loader.

 

[NMNeil]

Which datasheet do you refer to? This one clearly shows the location of each pin starting on page 14.

It's not the pin position that I'm having trouble with.
Page 300 of the full datasheet shows the data pins used for HV parallel programming being
PC(1:0) : (PB(5:0)
My question is that as they are sharing port B and port C to give the data byte, is bit 0 on PC0 and bit 7 on PB5, or is bit 0 on PB0 and bit 7 on PC1?

 

[Harald Kapp]

It seems you are referring to another datasheet than I do. Please post a link to your version, so we can have a look at it.

 

[NMNeil]

It seems you are referring to another datasheet than I do. Please post a link to your version, so we can have a look at it.

Atmel have updated their data sheet so it's now on page 352
http://www.atmel.com/Images/Atmel-42735-8-bit-AVR-Microcontroller-ATmega328-328P_datasheet.pdf

 

[Harald Kapp]

Now I seee. It's really obscure and information is hard to find.
This is what I found on another microcontroller forum (German, sorry):

D7 = PC1
D6 = PC0
D5 = PB5
D4 = PB4
D3 = PB3
D2 = PB2
D1 = PB1
D0 = PB0

 

[NMNeil]

Thank you so much.
I'm getting the hang of reading the bits right to left and beginning the count with 0, but when they share a byte between 2 registers, that one had me stumped.