Differences

This shows you the differences between two versions of the page.

--- boards:mt128 [2022/11/11 12:59] – [Olimex AVR MT128] darron
+++ boards:mt128 [2022/11/21 19:06] (current) – darron
@@ Line 9: / Line 9: @@
 Plugging this board into a usbtiny or usbasp connected to a RPi
-has the tendency to crash the Pi due to inrush current into this board. It
+may crash the Pi due to inrush current. It
-is more sensible to utilise a usbasp which can remove the power to the
+is  sensible to utilise a programmer which can disable (or not supply) target power and power this board using  its AC input.
-target and power this board using the its AC input.
+===Test===
+<code>
+avrdude -c usbtiny -p m128
+avrdude: AVR device initialized and ready to accept instructions
+Reading | ################################################## | 100% 0.01s
+avrdude: Device signature = 0x1e9702 (probably m128)
+avrdude: safemode: Fuses OK (E:FF, H:09, L:CF)
+avrdude done.  Thank you.
+</code>
+===Pinout===
+==JTAG==
+__Male socket__
+<code>
+TCK  2 GND
+TDO  4 5V
+K 5 TMS  6 RESET
+5V   8 NC
+TDI 10 GND
+</code>
+__Female plug__
+<code>
+GND   1 TCK
+5V    3 TDO
+RESET 5 TMS K
+NC    7 5V
+GND   9 TDI
+</code>
+K=KEY
+==ISP==
+__Male socket__
+<code>
+MOSI  2 5V
+NC    4 GND
+K 5 RST   6 GND
+SCK   8 GND
+MISO 10 GND
+</code>
+K=KEY
+==RS-232==
+__DB9 female socket__
+<code>
+3 3 2 1
+8 7 6
+</code>
+<code>
+NC
+TXD
+RXD
+NC
+GND
+NC
+NC
+NC
+NC
+</code>
 ===Resources===
@@ Line 18: / Line 92: @@
 [[https://www.olimex.com/Products/AVR/Development/AVR-MT128/resources/AVR-MT128.pdf|User manual]]
+[[https://eleccelerator.com/fusecalc/fusecalc.php?chip=atmega128&LOW=CF&HIGH=09&EXTENDED=FF&LOCKBIT=FF|Fuse calculator]]
+[[https://ww1.microchip.com/downloads/en/DeviceDoc/doc2467.pdf|ATmega128 datasheet]]

Differences

start

boards

advertisement

Toolbox