Can anyone confirm correct default fuses for ATTINY2313?

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alank2
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Posted by alank2: Fri. Apr 5, 2019 - 11:25 PM
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ATDF file says 0x62 for the low fuse, but the datasheet says 0x64.  Any idea which is correct?  Datasheet error?

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AVR Microcontrollers, megaAVR and tinyAVR
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ezharkov
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Posted by ezharkov: Sat. Apr 6, 2019 - 01:41 AM
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This is messed up. There are datasheets with 0x62 and 064. There are ATDFs with 0x62 and 0x64. Let's look at Atmel.ATtiny_DFP.1.3.229.atpack from http://packs.download.atmel.com/ :

grep initval ATtiny2313* | grep LOW
ATtiny2313.atdf:        <register caption="" name="LOW" offset="0x00" size="1" initval="0x64">
ATtiny2313A.atdf:        <register caption="" name="LOW" offset="0x00" size="1" initval="0x62">

 

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Simonetta
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Posted by Simonetta: Sat. Apr 6, 2019 - 01:51 AM
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The low fuse=0x64 has the system clock running at 8MHz.  This is the factory default [also the CLK/8 fuse is active: which makes the clock default actual be 1MHz].

When the low fuse is 0x62, then the system clock is 4MHz.  Table 2: page 23 of the PDF datasheet file for ATtiny2313.

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