About atmega128A programming

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#1
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I've seen that the old atmega128 had ISP support (non jtag), but I can't find ISP support in the new atmega128A

Is ISP obsolete?

I wanted a 4k+ Ram device with ISP, but can't find anything.

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Quote:

but I can't find ISP support

Eh? Where have you looked? It's identical (the A devices are just a die shrink leading to power reductions)

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clawson wrote:
Quote:

but I can't find ISP support

Eh? Where have you looked? It's identical (the A devices are just a die shrink leading to power reductions)

I've checked the pdf from atmel and only refers to JTAG.

I own an ISP-only programmer

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The datasheet doesn't need to be checked, it needs to be read instead.

Warning: Grumpy Old Chuff. Reading this post may severely damage your mental health.

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Though you don't have to read VERY far:

Feb 2010 ATmega128A datasheet PAGE 1 wrote:
Features
• High-performance, Low-power AVR® 8-bit Microcontroller
• Advanced RISC Architecture
–133 Powerful Instructions – Most Single Clock Cycle Execution
–32 x 8 General Purpose Working Registers + Peripheral Control Registers
–Fully Static Operation
–Up to 16 MIPS Throughput at 16 MHz
–On-chip 2-cycle Multiplier
• High Endurance Non-volatile Memory segments
–128K Bytes of In-System Self-programmable Flash program memory
–4K Bytes EEPROM
–4K Bytes Internal SRAM
–Write/Erase cycles: 10,000 Flash/100,000 EEPROM
–Data retention: 20 years at 85°C/100 years at 25°C(1)
–Optional Boot Code Section with Independent Lock Bits
In-System Programming by On-chip Boot Program
True Read-While-Write Operation
–Up to 64K Bytes Optional External Memory Space
–Programming Lock for Software Security
–SPI Interface for In-System Programming

(though the ISP *still* isn't on the SPI pins - but that's the same as the original ATmega128)

Last Edited: Fri. Apr 16, 2010 - 11:54 AM
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MBedder wrote:
The datasheet doesn't need to be checked, it needs to be read instead.

mmm lol

SPI, that's it!

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At least they got the letters right. The clone Olimex JTAGs for $40 work good on the 'older' mega16,32,64,128s.

Imagecraft compiler user

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bobgardner wrote:
At least they got the letters right. The clone Olimex JTAGs for $40 work good on the 'older' mega16,32,64,128s.

thanks guys, I've chosed the sanguino board.

It have all I need (and It works with atmega1284)

avrfreaks, great community!

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But where are you from? Inquiring minds want to know!

Imagecraft compiler user