244r

Some pics of the 244r,
These aren't official build notes... more my personal pics to help trouble shoot my build.

There ARE two microcontrollers.
It doesn't look like there are any programming headers on the PCB so I may have to program these using
a breadboard.

 sOME PICS  of the naked PCBs.

VCAs
The V2164 is a quad VCA. You can also get these from thonk
http://coolaudio.com/docs/COOLAUDIO_V2164MD_DATASHEET.pdf

The 700-MAX5250BCPP is a
Digital to Analog Converters - DAC 10-Bit 4Ch Precision DAC

The 556-ATTINY84A-PU is a
Amtel 8-bit Microcontroller - MCU 20MHz Ind. Grade 
There are 14 pins.

The 556-ATTINY88-PU is a 
8-bit Microcontrollers - MCU 8KB In-system Flash 12MHz 1.8V-5.5V 
It is 28 pin DIP that can be plugged into a breadboard

 

Each have their own firmware
DOWNLOADS:
ATTINY88 FIRMWARE REV1.0
ATTINY84 FIRMWARE REV1.1 

How should i program these chips?
Could use a AVR programmer or arduino ??
I have an Olimex so might try that first
https://www.olimex.com/Products/AVR/Programmers/AVR-ISP-MK2/open-source-hardware 
The Olimex has a 6 pin & 10 pin ribbon cable

The 10-pin cable fits only the ICSP10 connector.
(In Circuit Serial Programmer)

 The Olimex AVR-ISP-MK2 doesn't provide 6-pin ICSP connector.
The 6-pin cable is for PDI and TPI connectors.
I'll be flashing the chip via the ICSP 10 connector. 
Pin 1 can be identified with an arrow and the red stripe 

So, Depending on the connectors available on your target board you might need an adapter called AVR-ICSP (these connectors are pretty common on mutable instrument boards, but this Buchla format module doesnt have any header ... So I'll need to program using a breadboard.

 This is the ATtiny84 being flashed.
Look for the green LED (instead of red). Green = OK.

And the ATtiny88

Recommended operating systems:- Windows 7 or Windows 8 or Windows 10- any frequently updated Linux distribution- any Mac OS/OSX 
Recommended software tools:- Atmel Studio 6 or Atmel Studio 7- AVRDUDE 6.0.1 or newer- Arduino IDE 

I decided to use Atmel studio 7.

Long installation... about 20 mins.
But programming seems very smooth.

 Tools ----> Device Programming ----->

Choose the tool (AVRISP MkII), then device (eg ATtiny88) .
Hit "apply".

Then go to "Memories"
 You pick the hex file to upload from the Flash (8Kb) section ... dropdown box.

 Hit the "program" button to upload the hex file.

 

Links
+ About Microcontrollers and synths
+ Modularsynthesis.com
+ TheElectricMusicStore
+ BOM

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