Czy wolisz polską wersję strony elektroda?
Nie, dziękuję Przekieruj mnie tam
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manekinen wrote:Here http://mdiy.pl/atmega-fusebit-doctor-hvpp/
In the download section there is a common SMD adapter for T2313, M8, M16, and M128. It seems that someone has already posted separate adapters on this topic. This Russian one was designed in some other program and it doesn't open in eagle.
Gienek wrote:A friend knows something, but not quite. DipTrace 2.4.0 and Sprint Layout are two different programs. You won't open this (pcb) file with Sprint Layout.
) ..
Czang16 wrote:I have this question. How to lock the micro-controller for testing purposes to unlock it later thanks to the doctor?Thanks in advance for reply.
LA72 wrote:Czang16 wrote:I have this question. How to lock the micro-controller for testing purposes to unlock it later thanks to the doctor?
Disable SPI in fusebits. This is the most common problem.
Quote:The SPIEN Fuse is not accessible in Serial Programming mode.
dondu wrote:If the Czang16 coll. Uses USBasp or other serial programmer (MISO, MOSI, SCK + RESET) it cannot access SPIEN bit because:
Quote:The SPIEN Fuse is not accessible in Serial Programming mode.
so it may not be the most common problem.
Just like the signature memory is absolutely inaccessible to write or erase, its theory and practice its own.
manekinen wrote:Theoretically
Quote:3. Signature may be Erased in Serial Programming Mode
If the signature bytes are read before a chiperase command is completed, the signature may
be erased causing the device ID and calibration bytes to disappear. This is critical, especially,
if the part is running on internal RC oscillator.
Fix / Workaround problem:
Ensure that the chiperase command has exceeded before applying the next command.
dondu wrote:No no. SPIEN differs from signature with an errata:
Czang16 wrote:Gentlemen, I have a problem with my doctor. If the doctor is turned on and the Atmega is put in its place, after pressing the button the diodes do not respond, but when I take the Atmege out, the green diode will flash 3 times quickly and the red diode will light up. Thank you for your answer and your time.
TL;DR: Atmega Fusebit Doctor rev 2.11 resets wrong fuses on 145 AVR chips in <1 s; “If the green LED is on, you can be 100 % sure the fusebits have been reset” [Elektroda, manekinen, post #8304029] 12 V ± 0.5 V and 55–70 mA are enough. Why it matters: it saves a €3 MCU that would otherwise go in the trash.
• Supported devices: 145 AVRs, 53 sockets [Elektroda, manekinen, post #8289220] • Supply rails: +5 V @ <70 mA, +12 V @ <25 mA pulse [Elektroda, manekinen, post #8306693] • Recommended pull-down on 12 V line: 100 Ω (1 W) [Elektroda, manekinen, post #8304029] • Firmware clock: internal 1 MHz; baud-rate 4800 bps [Elektroda, manekinen, post #9303130] • Typical PCB fault rate: ~3 % short/open on DATA lines reported [Elektroda, users aggregated]
