ttbit
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OFFICIAL TTBIT SCRYPT LITECOIN MINER Setup Info

Sun Sep 02, 2018 10:26 am

Image THANK YOU FOR YOUR ATTENTION!!!

THIS IS THE SUPPORT THREAD: Keep this thread on topic!


BFGMINER 5.4.2 Instructions

I have built a native bfgminer driver binaries with support for Linux and Windows x64. More systems and architectures coming soon. Please follow the GitHub release link below, which has binaries for each system attached.

bfgminer download: https://github.com/ttbit-software/bfgminer/releases

You will also need to install the latest version of Silicon Labs VPC drivers for Win OS link below. If you downloaded this driver below, make sure you update to the latest version, as the TTBIT USB Scrypt Miner uses a new UART chip and the old driver will not work will with it.

UART VPC Driver: https://www.silabs.com/products/develop ... cp-drivers

For linux you need to execute the .sh file in terminal with sudo command i.e. sudo start.sh

Just edit that same file with a text editor to change pools, add bfgminer options, and change frequency. You can also use the -c flag and load it with your own config file.

If everything is setup and running correctly you should see something similar to this:

Image

If you are new to mining, the most important stats on this screen are what is in between the dashed lines. These are your per device statistics, so if we follow along from left to right for MLD 0, the first number (3.32 mh/s) is your 2 minute average hashrate, second number is your overall average hashrate since miner start (3.34 mh/s), and the last number (3.41) is the pool hashrate based on your submitted shares. A:596 shows your number of shares accepted by the pool, R:4 shows number of shares rejected (usually due to a stale share), and last number HW:0 shows the number of hardware errors reported by the ASIC. This is probably the most important value and will be explained in more detail in the tuning section below.

If you overclock it successfully it will look like this:

Image

900 mhz with v.core = 0.88 and m.core = 0.9 @ 5mh/s

Frequency:

The TTBIT Scrypt miner can run on a very wide range of speed and efficiency, and leaves a lot of tuning up to you guys. Make sure you read up on the Support section below where I go more in-depth on frequency and voltage tuning. The TTBIT Scrypt Miner has a default frequency setting of 600mhz, and can range from 384mhz to up to a cap of 954mhz.

To change the frequency edit the start.sh file in your driver folder and change the number in "--set MLD:clock=600" to the desired frequency.

Please note that this version of the miner has a fixed list of frequencies available to use below.
List of available frequencies: 384, 450, 480, 540, 576, 600, 612, 625, 636, 648, 660, 672, 684, 700, 720, 744, 756, 768, 796, 832, 852, 876, 900, 924, 954

To run the miner at higher frequencies then you must adjust the voltage. If you run the miner using --set MLD:clock=900 at the stock core voltage (0.75) then it will simply stall. Follow the steps below to adjust core voltage (EXPERTS ONLY!!!):

Voltage Adjustment:

There are two pots that control the two main voltages feeding the ASIC. The left pot (next to usb port) controls the memory voltage (when looking at the board with USB port facing left), and the right controls core voltage. When shipped, memory voltage is set to 0.90v and core voltage is set to 0.75v.

Below is a visual of the board for reference:
Image You adjust the voltage by turning the Pot clockwise or counterclockwise with a fine flat head or philips screwdriver. The pots are VERY sensitive, the whole voltage range is within HALF a turn in either direction from the stock position. You must do micro adjustments if you want to do very fine tuning. For example going from .75 - .8 v might take as little as a little torque pressure on the screwdriver even if you don't feel it actually twist.

Make sure you have place the stick horizontal and the USB end is facing LEFT.

To turn the voltage UP turn the pot CLOCKWISE, to turn it DOWN, COUNTERCLOCKWISE.

DO NOT turn the pots more than 180 degrees in either direction, they have no stops and if you go past their lowest or highest setting you could damage them.

To check the voltage use a multimeter and contact the ground wire to the ground terminal (circled and labeled ground in the picture), and the positive wire to the outputs of the two inductors (circled and labeled VCORE, and VMEMORY). Be extra careful not to short anything as a single short anywhere on the board while its powered will most likely fry it. I recommend doing this with a voltmeter. But if you do not have voltmeter then please know that a quarter turn clockwise on the VCORE changes the value from 0.75 to 1.0v
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