| ??? 08/20/06 19:35 Read: times |
#122664 - comment on it Responding to: ???'s previous message |
hi,
Jerry Black said:
I have been developing with a Atmel at89c51ac3.
I like this chip because of the ISP UART option and 1k or so XRAM. I already have some firmware mostly written. I think you need specific derivative due AC3 is one of ones which has ADC on-chip, do you? Not all derivatives offer this feature. Or ADC is not the option? It not fast enough. The datasheet says it will run at 30 Mhz in x2 mode. So I am already overclocking. Atmel does not have any other fasters chips in the PLCC 42 ot 52 package. Have you elaborated the reason of "It not fast enough"? Perhaps code optimization and re-structuring of algorithms help or what? And since I don't have a surface mount soldering iron, it needs to be in a PLCC package.
Could you explain this, please? Do you need with exactly Atmel chip in PLCC52 pin-to-pin compatible one? If you look for Atmel derivative exactly as AC3 in PLCC52 then the answer is no, it is not present. If you look for derivative from other vendors but pin-to-pin compatible one in PLCC52 then the answer is "most probably no". If you are ready to re-arrange schematic and PCB but still for PLCC52 then it is "may be" but I personaly doubt on it. Finally, if you accept QFP, SOIC, DIP so "probably yes". Regards, Oleg |
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| Help selecting a 8052 | 01/01/70 00:00 | |
| Why | 01/01/70 00:00 | |
| 200x24 LED Matrix. | 01/01/70 00:00 | |
| why not use some shift registers? | 01/01/70 00:00 | |
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| That's PLCC-44, isn't it? | 01/01/70 00:00 | |
| Thanks Richard. | 01/01/70 00:00 | |
| features and compatibility | 01/01/70 00:00 | |
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