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

[Bob Cochran]

Thank you! Doesn't pin 9 (reset) need a pull-up resistor?

Bob


> On Feb 10, 2014, at 12:43 AM, Ormund Williams <address@hidden> wrote:
> 
>> 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
> 
> 
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