Differences

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

--- boards:mt128 [2022/11/11 13:05] – [Resources] 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 -c usbtiny -p m128
 avrdude: AVR device initialized and ready to accept instructions
@@ Line 27: / Line 26: @@
 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>
@@ Line 36: / Line 94: @@
 [[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]]

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