Re: [avr-chat] Minimum Hardware For Atmega32 Programming With AVRDUDE

[Ormund Williams]

On Sun, 2014-02-09 at 22:05 -0500, Robert Cochran wrote:
> I'd like to ask what the minimum hardware configuration is for
> successful programming of an Atmega32 PDIP chip with Avrdude. I have
> ordered hardware accordingly. Perhaps this list could kindly be
> reviewed?

> 1. Breadboard
> 2. Atmega32 PDIP
> 3. 5v power supply
> 4. Programmer, such as this:
> http://www.ebay.com/itm/USBTiny-USBtinyISP-AVR-ISP-programmer-for-Arduino-bootloader-Meag2560-uno-r3-/400368767664?ssPageName=ADME:L:OC:US:3160
> or
> An Arduino already configured as a programmer

> 5. XTAL or resonator of a frequency listed in datasheet
> 6. If XTAL is used, 22 pf ceramic capacitors
For 'minimum hardware' don't need 5 and 6

> 7. LED for a basic blinking light action
Good

> 8. 330 Ohm and 10K Ohm resistors
330 ohm resistor to limit current in LED, what's the 10k for?

> 9. Possibly a powered USB hub to connect programmer to
Don't need this, ISPs use very little power.

> Hardware connections as follows:

> 1. 5v VCC connected to pins 9, 10, 30
Connect 5v VCC to 10, 30 and 32, connect 9 only to the ISP

> 2. GND connected to pins 11, 31
Good.


> 3. XTAL or resonator connected to pins 12, 13
> 4. If XTAL used, 22 pf capacitors connected to XTAL and GND
Don't need step 3 and 4. A factory blank mega32 comes with the internal
8MHz RC oscillator enabled and doesn't use an external crystal until you
set the right fuses.


> 5. Programmer pins connected to Atmega pins 6, 7, 8, 9, GND
And VCC, some programmers may not see the chip if they don't detect
power.


Regards.



-- 
Ormund