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The BM1366

The BM1366 is an undocumented SHA256 mining ASIC from Bitmain. It’s mostly used in the Antminer S19.

PriceNew: ~$25 Used: ~$15 in small quantities
Efficiency25J/TH
Seraial ProtocolUART
Baudrate-
Footprint-

Pinout

BM1366Pinout

PinoutExplanation
VDD1_0Internal voltage domain 1. (for bypass capacitors)
VDD2_0Internal voltage domain 2. (for bypass capacitors)
VDD3_0Internal voltage domain 3. (for bypass capacitors)
VSSGround
NRSTIReset input
BIBusy Input
ROSerial Response Output
CLKIClock Input
CISerial Command Input
ADDR0Address 0 (unknown functionality)
ADDR1Address 1 (unknown functionality)
PLL_VSSPhase Locked Loop Ground
VDDIO_08_00.8V IO voltage
VDDIO_18_01.8V IO voltage (this is normally 1.2V now)
VDD1_1Internal voltage domain 1. (for bypass capacitors)
VDD2_1Internal voltage domain 2. (for bypass capacitors)
VDD3_1Internal voltage domain 3. (for bypass capacitors)
VSSGround
NRST0Reset Output
BOBusy Output
RISerial Response Input
CLK0Clock output
COSerial Command Output
INV_CLK0Inverted Clock Output (unknown use)
PIN_MODEPin mode selector
VSSGround
VDI0_08_10.8V IO voltage
VSI0_08_11.8V IO voltage (this is normally 1.2V now)

Versions

How to identify a cracked “destroyed” chip

BM1366cracked

Here you can cleary see a crack right in the middle of the die. This indicates too much heat on the chip itself probably during a soldering attempt. This crack identifies that this chip will no longer work and therefore has been destroyed. It has multiple versions.