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BM1385 ASIC Chip Datasheet

BM1385 ASIC Chip Datasheet

Created 2022/08/06　

I. Overview

BM1385 is a kind of high-performance and low-power consumption bitcoin mining ASIC chip.

1. Features:

1) Typical hash rate and power consumption;

Voltage(V)

Hash Rate(GH/S)

Current(A)

Total power(W)

W/GH

0.71

38.75

14.350

10.189

0.263

0.66

32.50

10.760

7.102

0.219

0.60

21.25

6.410

3.846

0.181

2) Customized package;

3) Support the UART communication interface;

4) Support chain mode, Max 256 chips per chain.

2. Applications

Bitcoin Antminer S7

Antminer S7

II. Pin description

1. Pin diagram

BM1385 ASIC chip pin diagram

2. Signal Description

Name

I/O

Active Level

Description

XIN

I

N/A

Oscillator input

XOUT

O

N/A

Oscillator output

RST_N

I

L

Reset signal

TEST

I

N/A

Internal pull down.

0: Normal mode

1: Test mode

CLKOUT

O

N/A

Clock output

NRSTO

O

L

Reset output

CI

I

N/A

Command Input. Schmitt input.

CO

O

N/A

Command Output

RI

I

N/A

Respond Input. Schmitt input and internal pullup.

RO

O

N/A

Respond Output

BI

I

H

Respond Busy Input. Schmit input and internal pulldown.

BO

O

H

Respond Busy Output

ADDR[3:0]



Address Input. Internal pullup.

RF

O


RO open drain output; Command Rx Flag

TF

O


Respond Tx Flag

PLL_VDD



PLL power (0.9V)

PLL_VSS



PLL ground

LDO_VDD1



LDO power input. Typical 1.8V

LDO_VDDO



LDO power output 0.9V. 1uF external capacitor.

NRST_A



Reset input. Trigger level is (-VDD, VDDPST-VDD)

BI_A



BI input. Trigger level is (-VDD, VDDPST-VDD)

CI_A



CI input. Trigger level is (-VDD, VDDPST-VDD)

XIN_A



XIN input. Trigger level is (-VDD, VDDPST-VDD)

RI_A



RI input. Trigger level is (VDD, VDDPST+VDD)

III. UART description

1. UART protocol

The default baud rate is 115200 when the XIN clock frequency is 25MHz. it can be set via command.

Minimum RX guard time: 1 bit

TX guard time: 2 bit

RX IDLE: 16 bits

Bit order: LSB

2. Work format

Byte0~31 (32bytes)

Byte32~35 (4bytes)

Byte36~39 (4bytes)

Byte40~43 (4bytes)

Byte44~47 (4bytes)

Byte48~50 (3bytes)

Byte51

Byte52~63 (12bytes)

Midstate

Ignore

TM

HCN

SNO

Ignore

Bit[7]

Bit[6:0]

Data2

Ignore

WC

SNO: Start Nonce Offset.

WC: Work Count. It is used to index the input works.

HCN: Hash counting number. When HCN is reached, the hash core will stop hashing.

TM: Ticket Mask. It is used to set the difficulty of return nonce.

3. Work timing

PLLDiv1

PLLDiv2

FBDIV

[11:0]

REFDIV

[5:0]

POSTDIV1

[2:0]

POSTDIV2

[2:0]

Freq(Mhz)

step(Mhz)

0x20040

0x420

32

2

4

1

100.00

0.00

0x28040

0x420

40

s2

4

1

125.00

25.00

0x30040

0x420

48

2

4

1

150.00

25.00

0x38040

0x420

56

2

4

1

175.00

25.00

0x40040

0x420

64

2

4

1

200.00

25.00

0x48040

0x420

72

2

4

1

225.00

25.00

0x50040

0x420

80

2

4

1

250.00

25.00

0x58040

0x420

88

2

4

1

275.00

25.00

0x60040

0x420

96

2

4

1

300.00

25.00

0x68040

0x420

104

2

4

1

325.00

25.00

0x70040

0x420

112

2

4

1

350.00

25.00

0x78040

0x420

120

2

4

1

375.00

25.00

0x80040

0x420

128

2

4

1

400.00

25.00

0x61040

0x320

97

2

3

1

404.17

4.17

0x41040

0x220

65

2

2

1

406.25

2.08

0x62040

0x320

98

2

3

1

408.33

2.08

0x42040

0x220

66

2

2

1

412.50

4.17

0x63040

0x320

99

2

3

1

412.50

4.17

0x64040

0x320

100

2

3

1

416.67

4.17

0x43040

0x220

67

2

2

1

418.75

2.08

0x65040

0x320

101

2

3

1

420.83

2.08

0x44040

0x220

68

2

2

1

425.00

4.17

0x66040

0x320

102

2

3

1

425.00

4.17

0x67040

0x320

103

2

3

1

429.17

4.17

0x45040

0x220

69

2

2

1

431.25

2.08

0x68040

0x320

104

2

3

1

433.33

2.08

0x46040

0x220

70

2

2

1

437.50

4.17

0x69040

0x320

105

2

3

1

437.50

4.17

0x6a040

0x320

106

2

3

1

441.67

4.17

0x47040

0x220

71

2

2

1

443.75

2.08

0x6b040

0x320

107

2

3

1

445.83

2.08

0x48040

0x220

72

2

2

1

450.00

4.17

0x6c040

0x320

108

2

3

1

450.00

4.17

0x6d040

0x320

109

2

3

1

454.17

4.17

0x49040

0x220

73

2

2

1

456.25

2.08

0x6e040

0x320

110

2

3

1

458.33

2.08

0x4a040

0x220

74

2

2

1

462.50

4.17

0x6f040

0x320

111

2

3

1

462.50

4.17

0x70040

0x320

112

2

3

1

466.67

4.17

0x4b040

0x220

75

2

2

1

468.75

2.08

0x71040

0x320

113

2

3

1

470.83

2.08

0x4c040

0x220

76

2

2

1

475.00

4.17

0x72040

0x320

114

2

3

1

475.00

4.17

0x73040

0x320

115

2

3

1

479.17

4.17

0x4d040

0x220

77

2

2

1

481.25

2.08

0x74040

0x320

116

2

3

1

483.33

2.08

0x4e040

0x220

78

2

2

1

487.50

4.17

0x75040

0x320

117

2

3

1

487.50

4.17

0x76040

0x320

118

2

3

1

491.67

4.17

0x4f040

0x220

79

2

2

1

493.75

2.08

0x77040

0x320

119

2

3

1

495.83

2.08

0x50040

0x220

80

2

2

1

500.00

4.17

0x78040

0x320

120

2

3

1

500.00

4.17

0x79040

0x320

121

2

3

1

504.17

4.17

0x51040

0x220

81

2

2

1

506.25

2.08

0x7a040

0x320

122

2

3

1

508.33

2.08

0x52040

0x220

82

2

2

1

512.50

4.17

0x7b040

0x320

123

2

3

1

512.50

4.17

0x7c040

0x320

124

2

3

1

516.67

4.17

0x53040

0x220

83

2

2

1

518.75

2.08

0x7d040

0x320

125

2

3

1

520.83

2.08

0x54040

0x220

84

2

2

1

525.00

4.17

0x7e040

0x320

126

2

3

1

525.00

4.17

0x7f040

0x320

127

2

3

1

529.17

4.17

0x55040

0x220

85

2

2

1

531.25

2.08

0x80040

0x320

128

2

3

1

533.33

2.08

0x56040

0x220

86

2

2

1

537.50

4.17

0x57040

0x220

87

2

2

1

543.75

6.25

0x58040

0x220

88

2

2

1

550.00

6.25

0x59040

0x220

89

2

2

1

556.25

6.25

0x5a040

0x220

90

2

2

1

562.50

6.25

0x5b040

0x220

91

2

2

1

568.75

6.25

0x5c040

0x220

92

2

2

1

575.00

6.25

0x5d040

0x220

93

2

2

1

581.25

6.25

0x5e040

0x220

94

2

2

1

587.50

6.25

0x5f040

0x220

95

2

2

1

593.75

6.25

0x60040

0x220

96

2

2

1

600.00

6.25

0x61040

0x220

97

2

2

1

606.25

6.25

0x62040

0x220

98

2

2

1

612.50

6.25

0x63040

0x220

99

2

2

1

618.75

6.25

0x64040

0x220

100

2

2

1

625.00

6.25

0x65040

0x220

101

2

2

1

631.25

6.25

0x66040

0x220

102

2

2

1

637.50

6.25

0x67040

0x220

103

2

2

1

643.75

6.25

0x68040

0x220

104

2

2

1

650.00

6.25

0x69040

0x220

105

2

2

1

656.25

6.25

0x6a040

0x220

106

2

2

1

662.50

6.25

0x6b040

0x220

107

2

2

1

668.75

6.25

0x6c040

0x220

108

2

2

1

675.00

6.25

0x6d040

0x220

109

2

2

1

681.25

6.25

0x6e040

0x220

110

2

2

1

687.50

6.25

0x6f040

0x220

111

2

2

1

693.75

6.25

0x70040

0x220

112

2

2

1

700.00

6.25

0x71040

0x220

113

2

2

1

706.25

6.25

0x72040

0x220

114

2

2

1

712.50

6.25

0x73040

0x220

115

2

2

1

718.75

6.25

0x74040

0x220

116

2

2

1

725.00

6.25

0x75040

0x220

117

2

2

1

731.25

6.25

0x76040

0x220

118

2

2

1

737.50

6.25

0x77040

0x220

119

2

2

1

743.75

6.25

0x78040

0x220

120

2

2

1

750.00

6.25

0x79040

0x220

121

2

2

1

756.25

6.25

0x7a040

0x220

122

2

2

1

762.50

6.25

0x7b040

0x220

123

2

2

1

768.75

6.25

0x7c040

0x220

124

2

2

1

775.00

6.25

0x7d040

0x220

125

2

2

1

781.25

6.25

0x7e040

0x220

126

2

2

1

787.50

6.25

0x7f040

0x220

127

2

2

1

793.75

6.25

0x80040

0x220

128

2

2

1

800.00

6.25

0x41040

0x120

65

2

1

1

812.50

12.50

0x42040

0x120

66

2

1

1

825.00

12.50

0x43040

0x120

67

2

1

1

837.50

12.50

0x44040

0x120

68

2

1

1

850.00

12.50

0x45040

0x120

69

2

1

1

862.50

12.50

0x46040

0x120

70

2

1

1

875.00

12.50

0x47040

0x120

71

2

1

1

887.50

12.50

0x48040

0x120

72

2

1

1

900.00

12.50

0x49040

0x120

73

2

1

1

912.50

12.50

0x4a040

0x120

74

2

1

1

925.00

12.50

0x4b040

0x120

75

2

1

1

937.50

12.50

0x4c040

0x120

76

2

1

1

950.00

12.50

0x4d040

0x120

77

2

1

1

962.50

12.50

0x4e040

0x120

78

2

1

1

975.00

12.50

0x4f040

0x120

79

2

1

1

987.50

12.50

0x50040

0x120

80

2

1

1

1000.00

12.50

4. Nonce respond format

4bytes

Bit[7]

Bit[6:0]

Nonce

1

WorkCount

5. Configuration description

Support two modes:

a. FIL (Fixed Input Length)

b. VIL (Variable Input Length)

When the system reset (RST_N is low), if ADDR3 is HIGH, and it is FIL mode; else, it is VIL mode.

1) Command

ALL

CMD[6:0]

command

0/1

1

Set Address

1

2

SetPLLDivider2

0/1

4

Get Status

1

5

Chain Inactive

0/1

6

Set Baud OPS

1

0x7

Set PLL Divider1

0/1

0x8

Set Config. Only valid in VIL mode.

2) Set Address

FIL:

31

30:24

23:16

15:8

7:6

[5:0]

ALL

CMD

ADDR

Reserved

Reserved

CRC5

VIL:

Byte0

Byte1

Byte2

Byte3

Byte4

7:5

4

3:0

7:0

7:0

7:0

7:5

4:0

TYPE=2

ALL=0

CMD

Length=5

ADDR

Reserved

Reserved

CRC5

3) Chain Inactive

FIL:

31

30:24

23:16

15:8

7:5

4:0

ALL

CMD

Reserved

Reserved

Reserved

CRC5

VIL:

Byte0

Byte1

Byte2

Byte3

Byte4

7:5

4

3:0

7:0

7:0

7:0

7:5

4:0

TYPE=2

ALL=1

CMD

Length=5

Reserved

Reserved

Reserved

CRC5

4) Set PLL Divider

Set PLL Divider1：

31

30:24

23

23:12

11

10:5

4:0

Reserved

CMD

Reserved

FBDIV[11:0]

Reserved

REFDIV[5:0]

CRC5

Set PLL Divider2：

31

30:24

23:16

15:12

10:8

7:5

4:0

ALL

CMD

ADDR

Reserved

POSTDIV1[2:0]

POSTDIV2[2:0]

CRC5

FBDIV: PLL feedback divider, range from 60 to 160.

REFDIV: PLL reference clock divider, range from 1 to 63.

POSTDIV1: PLL post divide 1, range 1 to 7.

POSTDIV2: PLL post divide 2, range 1 to 7. Total post divide is POSTDIV1* POSTDIV2. The value of POSTDIV1 should ALWAYS be greater than or equal to POSTDIV2.

set PLL divider

5) Get Status

31

30:24

23:16

15:8

7:5

4:0

ALL

CMD

ADDR

REGADDR

Reserved

CRC5

Register Respond format:

4bytes

Bit[7:5]

Bit[4:0]

Read data of register

000

CRC5

6) Set Config

Only valid in VIL mode.

Byte0

Byte1

Byte2

Byte3

Byte4~7

Byte8

7:5

4

3:0

7:0

7:0

7:0


7:5

4:0

TYPE=2

ALL

CMD

Length=9

ADDR

REGADDR

REGDATA

Reserved

CRC5

IV. Electrical character

1. Absolute maximum rating

Symbol

Parameter

Max value

Unit

VDD

Core Voltage

1.2

V

VCC

IO Voltage

1.98

V

PLL_DVDD

PLL Digital power

1.2

V

PLL_AVDD

PLL analog Power

1.92

V

TSTG

Storage Temperature

-65~150

C

2. Recommended operation conditions

Symbol

Parameter

Min.

Typ.

Max.

Unit

VDD

Core Voltage

0.60

0.66

0.8

V

IO_VDD

IO Voltage

1.62

1.8

1.98

V

PLL_VDD

PLL Digital power

0.81

0.9

0.99

V

TOPT

Operation Temperature

0

25

125

C

3. DC characters

Symbol

Parameter

Min.

Typ.

Max.

Unit

VIL

Input Low Voltage

-0.3


0.63

V

VIH

Input High Voltage

1.17


1.98

V

VOL

Output Low Voltage



0.45

V

VOH

Output High Voltage

1.35



V

IL

Input Leakage Current



±10

uA

VT

I/O threshold point

0.81

0.89

0.97

V

VT+

Schmitt input low to high threshold pint

0.95

1.03

1.10

V

VT-

Schmitt input high to low threshold pint

0.64

0.75

0.86

V

RPU

I/O internal pull-up resistor

47K

69K

106K

Q

RPD

I/O internal pull-down resistor

49K

85K

159K

Q

ICC(VCC)

Supply current of VCC


10


mA

ICC(PLL)

Supply current of PLL_DVDD and PLL_AVDD


4


mA

CBIN

Input pin capacitance


10


pF

CBOUT

Output pin capacitance


10


pF

NOTICE
This is an original piece. Reproduction in whole or part without written permission is prohibited.

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