The BM1370

The BM1370 is an undocumented SHA256 mining ASIC from Bitmain. It’s mostly used in the Antminer S21 Pro.

Hashrate

The nominal hashrate of the BM1370 is between 1~1.4TH/s.

Pin #	Pinout	Explanation
1	VDD3_0	Internal voltage domain 1. (for bypass capacitors)
2	VDD2_0	Internal voltage domain 2. (for bypass capacitors)
3	VDD1_0	Internal voltage domain 3. (for bypass capacitors)
4	VSS	Ground
5	NRSTI	Reset input
6	CI	Serial Command Input
7	RO	Serial Response Output
8	CLKI	Clock Input
9	BI	Busy Input
10	ROSC_SEL	Address 0 (unknown functionality)
11	LITE_PAD	Address 1 (unknown functionality)
12	INV_CLK0	Inverted Clock Output (unknown use)
13	PLL_VSS	Phase Locked Loop Ground
14	VDDIO_08_0	0.8V IO voltage
15	VDDIO_12_0	1.2V IO voltage
16	VDDI0_12_1	1.2V IO voltage
17	VDDI0_08_1	0.8V IO voltage
18	VSS	Ground
19	PIN_MODE	Pin mode selector
20	TEMP_P	Temperature postitive diode side
21	TEMP_N	Temperature negative diode side
22	BO	Busy Output
23	CLK0	Clock output
24	RI	Serial Response Input
25	CO	Serial Command Output
26	NRST0	Reset Output
27	VSS	Ground
28	VDD1_1	Internal voltage domain 1. (for bypass capacitors)
29	VDD2_1	Internal voltage domain 2. (for bypass capacitors)
30	VDD3_1	Internal voltage domain 3. (for bypass capacitors)
31	VDD	Power
32	VSS	Ground