Avalon2

Avalon2 is the second machine of Avalon project. using the 55nm ASIC chips

Pictures

PCB

Single modular

Avalon2 parts

Avalon2

User manual

TP LINK WR703N

The USB on the AR9331 have bugs. if you want use serial console, please the direct serial console on 703N (the /dev/ttyATH0). it's far more stable then USB-serial convertor. you may want add a usb-hub between machine and 703n

Raspberry Pi

The 13 ports USB HUB

• The default firmware IP address is 192.168.0.100, you can access it by http://192.168.0.100
• You may need update the address/DNS to your local configuration. DO NOT FORGET your IP address.
• If Rpi can access internet the cgminer should automatic start

• 8GB Memory card: http://item.jd.com/632744.html
• Reflash: sudo dd if=openwrt-brcm2708-sdcard-vfat-ext4.img of=/dev/sdb bs=4M #/dev/sdb is your memory card
• USB Hub, UNITEK Y-2132 USB2.0 13ports
• USB WiFi, EDUP EP-N8508GS

Manual by others

• 彩云比特中文评测

The Avalon2

• A3255 ASIC Datasheet: http://downloads.canaan-creative.com/hardware/A3255/datasheet/
• The Hardware design files: http://downloads.canaan-creative.com/hardware/A3255/avalon2

Specification

315GH/s, 1020W@220V in normal mode. 
210GH/s, 420W@220V in ECO mode. 

Avalon2 Single Modular

Module hash speed: ~105GHS
Chip operating speed: 1.5GHS 
Chip working voltage: 1.0V 
Typical values ​​DH: ~2% 
Module Power: 24.5A@12V, 294W (excluding fan power consumption). 0.1A @ 5V, 0.5A @ 3.3V. 
Power Module conversion efficiency: >= 87% 
Design Operating temperature: 85C (chip temperature), 60C (PCB, temperature sensor measurements) 
Fan: 4PIN PWM speed control, report fan speed back.
Include: Single modular, USB Connector

• LEDS 8 7 6 5 4 3 2 1

1, 2, 3, 4, 5: Blink when found nonce
6, 7, Data transfer
8: Error or under testing

Firmware

Source code

• MM(Miner Manager)]
• The cgminer Avalon2 support
• OpenWrt LUCI page
• OpenWrt cgminer package, files and config
• Build script file

20140123

• Include the first stable version of MM firmware
• Include the RPi OpenWrt firmware
• Include the 703N OpenWrt firmware
• Support fixed fan speed, support A3255 frequency from 1G to 2G, support adjust voltage for 0.65v to 1.1v
• Display all modules status include 2 fan, 2 temperature sensors, voltage and frequency
• Voltage display as encode mode. needs to be changed to human readable
• Include an ASIC cores testing python script
• Downloads: http://downloads.canaan-creative.com/software/avalon2/2014-01-23/

Testing

• The Avalon2 MM firmware support testing. no needs particular firmware.
• The host test program is here: https://github.com/BitSyncom/avalon-extras/blob/master/scripts/avalon2-a3255-modular-test.py
• Run avalon2-a3255-modular-test.py for testing. you may update your serial port at -s option.

Donation

• Ngzhang0: 1kBGUHDxmSAegACRB6fcE2vrnVAfPJarW
• Con Kolivas: 15qSxP1SQcUX3o4nhkfdbgyoWEFMomJ4rZ
• Kanoi: 1KanoiBupPiZfkwqB7rfLXAzPnoTshAVmb
• Xiangfu: 19BT2rcGStUK23vwrmF6y6s3ZWpxzQQn8x

Links

• 55nm open design contest: http://avalon-asics.com/avalon-gen2-55nm-open-source-design-contest/
• Documents release by Avalon: http://downloads.canaan-creative.com/hardware/A3255/
• Avalon2 prototype by using Avalon1 hardware design