Reverse Engineering Report
The first public reverse-engineering of
Canaan's A3197S Bitcoin mining ASIC
Date: June 5, 2026
Conducted by: Nikos
ASIC: Canaan A3197S — 10 SHA-256 engines per chip
Host platform: Canaan Avalon Nano 3s (12× A3197S, Kendryte K230D dual-core RISC-V)
Stock Firmware: Avalon Nano 3s release 2025061101 (June 2025)
Test Firmware: TNA-OS (custom mining stack built on the cracked protocol)
Board Revision: MM-NANO3S-V0.2
https://github.com/CryptoIceMLH/Nano3S
quotingBTC Tech Nerd Army
nevent1q…6m7f
First-ever crack of the Canaan A3197S ASIC
TNA-OS now supports Canaan Nano3s
--Adjustable frequency & core voltage, per-chip PLL
--Stratum V1 and V2 — full SV2 with Noise encryption, not just legacy V1
--Up to 8 pools with multipool + automatic failover
--PSU bypass / direct USB-PD control
--Live PSU telemetry: voltage, current, watts, PD-contract status, fault detection
--Live web dashboard with an interactive hashboard schematic — every chip's health, hashrate, temp, and chip-ID at a glance
--REST API + CGMiner-compatible API + SSH
Miner is live on pool- Link below
https://pool.gobrrr.me/stats/bc1quhztuc8vwms0e9mc4jd2jtw9d0u28mh9ht8528/tna-osnano3s