Wolfgang am 2. Jänner 2019 um 22:03 Uhr

2019-01-02T22:03:16Z

← Nächstältere Version		Version vom 2. Jänner 2019, 22:03 Uhr
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	{{PUGAUGE Hardware Summary}}		{{PUGAUGE Hardware Summary}}

	== Build notes ==		=== Build notes ===

	=== Connection of ATmega6490 ===		==== Connection of ATmega6490 ====

	In the first development version all circuitry is mounted on a solderless breadboard:		In the first development version all circuitry is mounted on a solderless breadboard:
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	{{TableEnd}}		{{TableEnd}}

	* Serial-USB Adapter, connected to TXD/RXD of UART0 of ATmega6490 PLUS Auto-Reset-Circuit using DTR of Serial-USB:		=== Serial-USB Adapter, connected to TXD/RXD of UART0 of ATmega6490 PLUS Auto-Reset-Circuit using DTR of Serial-USB ===

	{{TableBegin}}		{{TableBegin}}
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	\| 30 \|\| 5		\| 30 \|\| 5
	{{TableEnd}}		{{TableEnd}}

			=== Optional Debug-Assist Serial-USB-Adapter, connected to a GPIO Port driven by Software-UART ===

			This is an output-only software/bit-banging asynchronous serial output used for outputting debug information.

			The serial output of this interface is connected to GPIO Port PB6 and may be hooked up to an additional Serial-USB adapter.

			This debug output port is served by the [[PUGAUGE Software#PUGAUGE Debug Library\|PUGAUGE debug library]], which also provides a few convenience debug output functions and shortcut macros which can be enabled or disabled at compile time additional to route debug output to either the {{PUGAUGE}} LCD and/or the debug serial port.

	=== TQFP-100 Breakout board ===		=== TQFP-100 Breakout board ===

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2019-01-01T15:46:02Z

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{{PUGAUGE Hardware Summary}}

== Build notes ==

=== Connection of ATmega6490 ===

In the first development version all circuitry is mounted on a solderless breadboard:

{{Image|/public/public/Projekte/PUGAUGE/Hardware/PUGAUGE_BBD-002.JPG|height=400px}}

* The ATmega6490 is mounted on the [[#TQFP-100 Breakout board|BBR]].
* LCD-Voltage Buffer Capacitor: 3x220nF FKC in parallel from ATmega6490 Pin 1 / BBR Pin 76 to GND
* System Status LED: Port line PB0 (ATmega6490 Pin 19 / BBR Pin 94) to 330 Ohm to yellow LED to GND
* In-System-Programmer (IST) USPasp connected to 10-pin 2x5 100mil-spaced Connector:

See also http://nerdyelectronics.com/usbasp-tutorial/ :

<pre>
Connector seen on board pins
USBasp pin number USBasp pin MCU Pin +---+---+---+---+---+
1 MOSI MOSI | 2 | 4 | 6 | 8 |10 |
5 Reset Reset +---+---+---+---+---+
7 SCK SCK | 1 | 3 | 5 | 7 | 9 |
9 MISO MISO +---+--++---++--+---+
10 GND GND +-----+
2 Vcc Vcc NOTE1: the USBasp ribbon cable has a RED marking on the wire going to in 1
thus, it should be on the LEFT side of above connector!
NOTE2: the USBasp ribbon cable connector has a protrusion in the near pin 5. Look for this to be sure!
</pre>

{{TableBegin}}
! Signal name !! description !! 10-pin-conn pin number !! ATmega6490 pin name !! ATmega6490 pin number !! BBR pin number
|-
| MOSI || data from programmer to MCU || 1 || MOSI || 21 || 96
|-
| Reset || reset pulse to MCU || 5 || Reset || 30 || 5
|-
| SCK || serial clock to MCU || 7 || SCK || 20 || 95
|-
| MISO || data from MCU to programmer || 9 || MISO || 22 || 97
|-
| GND || Ground reference || 10 || GND || 99,11,32,81 || 74,86,7,56
|-
| VCC || +5V supply from programmer || 2 || VCC || 100,10,31,80 || 75,85,6,55
{{TableEnd}}

* Serial-USB Adapter, connected to TXD/RXD of UART0 of ATmega6490 PLUS Auto-Reset-Circuit using DTR of Serial-USB:

{{TableBegin}}
! Signal name !! description !! FT323-adapter pin !! ATmega6490 pin name !! ATmega6490 pin number !! BBR pin number
|-
| GND || Ground reference || GND || GND ||   ||  
|-
| TXD || data from USB to MCU || TXD || RXD/PCINT0/PE0 || 2 || 77
|-
| RXD || data from MCU to USB || RXD || TXD/PCINT1/PE1 || 3 || 78
|-
| DTR || DataTerminalReady from USB || DTR
| 100nF Capacitor to "Reset"-Pin<br/>PLUS: pullup-10k-Resistor to +5V<br/>parallel to 1N4148Diode<br/>Cathode to +5V, Anode to Reset<br/>PLUS "RESET"Button to GND
| 30 || 5
{{TableEnd}}

=== TQFP-100 Breakout board ===

When soldering the AVR6490 Chip in the TQFP-100 case to it's breakout board, I made an error:

I turned it 90 degrees to the right. Therefore Pin 1 of the chip appears at Pin 76 of the breakout board.

The algorithm to find the BBR pin when knowing the pin number on the TQFP-100 package of the ATmega6490 is:

<code>''BBR-pin'' = (''TQFP-pin'' + 75) MOD 100</code>

There will be a translation table on the [[PUGAUGE Tables]] page.

Connection from the D301 LCD to the PUGAUGE MCU is documented on the [[PUGAUGE Tables]] page.

PUGAUGE Hardware - Versionsgeschichte

Wolfgang am 2. Jänner 2019 um 22:03 Uhr

Wolfgang: Die Seite wurde neu angelegt: „{{PUGAUGE Hardware Summary}} == Build notes == === Connection of ATmega6490 === In the first development version all circuitry is mounted on a solderless br…“