bq78350-R1与MCU通信手册_BQ78350

bq78350

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bq78350-R1

Technical Reference

Literature Number: SLUUBD3D

September 2015–Revised September 2018

SLUUBD3D–September 2015–Revised September 2018

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Contents

Preface ........................................................................................................................................ 9

1 Introduction....................................................................................................................... 10

2 Basic Measurement System................................................................................................. 11

2.1 Introduction.................................................................................................................. 11

2.2 Current and Coulomb Counting .......................................................................................... 11

2.3 Voltage....................................................................................................................... 11

2.4 Temperature ................................................................................................................ 12

2.4.1 FET Temperature Measurement ............................................................................... 12

2.4.2 Temperature Enable .............................................................................................. 12

2.4.3 Temperature Mode Configuration ............................................................................... 12

2.5 Temperature Ranges ...................................................................................................... 13

2.6 Basic Configuration Options .............................................................................................. 13

2.6.1 DA Configuration .................................................................................................. 13

2.6.2 FET Options........................................................................................................ 14

2.6.3 AFE Cell Map ...................................................................................................... 15

3 Protections........................................................................................................................ 17

3.1 Introduction.................................................................................................................. 17

3.1.1 General Protections Configuration .............................................................................. 17

3.1.2 Enabled Protections .............................................................................................. 18

3.1.3 Enabled Removal Recovery ..................................................................................... 20

3.1.4 FET Action Options for Current Protections ................................................................... 21

3.2 Cell Undervoltage Protection ............................................................................................. 21

3.3 Cell Overvoltage Protection............................................................................................... 22

3.4 Overcurrent in Charge Protection ........................................................................................ 22

3.5 Overcurrent in Discharge Protection..................................................................................... 23

3.6 Hardware-Based Protection............................................................................................... 24

3.6.1 Overload in Discharge Protection ............................................................................... 24

3.6.2 Short Circuit in Discharge Protection ........................................................................... 26

3.6.3 AFE ALERT OVRD Protection .................................................................................. 27

3.7 Temperature Protections .................................................................................................. 28

3.7.1 Overtemperature in Charge Protection......................................................................... 28

3.7.2 Overtemperature in Discharge Protection...................................................................... 29

3.7.3 Undertemperature in Charge Protection ....................................................................... 29

3.7.4 Undertemperature in Discharge Protection .................................................................... 29

3.7.5 Overtemperature FET Protection................................................................................ 30

3.8 Precharge Timeout Protection............................................................................................ 30

3.9 Fast Charge Timeout Protection ......................................................................................... 31

3.10 Overcharge Protection..................................................................................................... 31

4 Permanent Fail................................................................................................................... 32

4.1 Introduction.................................................................................................................. 32

4.2 Permanent Failure Configuration......................................................................................... 32

4.3 Enabling Use of the SAFE Pin ........................................................................................... 34

4.4 Safety Cell Undervoltage Permanent Fail............................................................................... 36

4.5 Safety Cell Overvoltage Permanent Fail ................................................................................ 37

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SLUUBD3D–September 2015–Revised September 2018

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Contents

4.6 Safety Overcurrent in Charge Permanent Fail ......................................................................... 37

4.7 Safety Overcurrent in Discharge Permanent Fail ...................................................................... 38

4.8 Safety Overtemperature Cell Permanent Fail .......................................................................... 38

4.9 Safety Overtemperature FET (SOTF) Permanent Fail ................................................................ 38

4.10 Voltage Imbalance at Rest Permanent Fail............................................................................. 39

4.11 Charge FET Permanent Fail.............................................................................................. 39

4.12 Discharge FET Permanent Fail........................................................................................... 39

4.13 External Override Permanent Fail........................................................................................ 40

4.14 AFE Register Permanent Fail............................................................................................. 40

4.15 AFE Communication Permanent Fail.................................................................................... 41

4.16 AFE XREADY Permanent Fail ........................................................................................... 41

4.17 Instruction Flash (IF) Checksum Permanent Fail ...................................................................... 41

4.18 Data Flash (DF) Permanent Fail ......................................................................................... 41

4.19 Open Thermistor Permanent Fail (TS1, TS2, TS3).................................................................... 42

4.20 PF Status Snapshot Data Flash.......................................................................................... 42

4.20.1 Device Status Data .............................................................................................. 42

4.20.2 Device Voltage Data ............................................................................................. 43

4.20.3 Device Current Data ............................................................................................. 44

4.20.4 Device Temperature Data....................................................................................... 44

4.20.5 AFE Regs ......................................................................................................... 44

4.21 Black Box Recorder........................................................................................................ 44

4.21.1 Black Box Recorded Data....................................................................................... 45

5 Charge Algorithm ............................................................................................................... 47

5.1 Introduction.................................................................................................................. 47

5.2 Fast and Pre-Charging .................................................................................................... 47

5.3 Valid Charge Termination ................................................................................................. 48

5.4 Charge and Discharge Alarms ........................................................................................... 48

5.5 Charge Disable ............................................................................................................. 51

5.6 Charge Inhibit............................................................................................................... 51

5.7 Charge Suspend ........................................................................................................... 52

6 System Present.................................................................................................................. 53

6.1 Introduction.................................................................................................................. 53

6.2 System Present Detection and Action................................................................................... 53

7 Cell Balancing.................................................................................................................... 54

7.1 Introduction.................................................................................................................. 54

7.1.1 Cell Balancing Configuration..................................................................................... 55

8 Power Modes ..................................................................................................................... 56

8.1 Introduction.................................................................................................................. 56

8.2 NORMAL Mode............................................................................................................. 56

8.3 SLEEP Mode................................................................................................................ 56

8.3.1 Device Sleep....................................................................................................... 56

8.3.2 ManufacturerAccess() MAC Sleep.............................................................................. 57

8.3.3 IN SYSTEM SLEEP Mode ....................................................................................... 57

8.4 SHUTDOWN Mode ........................................................................................................ 57

8.4.1 Voltage Based Shutdown ........................................................................................ 57

8.4.2 Time Based Shutdown............................................................................................ 58

8.4.3 ManufacturerAccess() MAC Shutdown......................................................................... 58

8.5 Power Mode Indication (PWRM) ......................................................................................... 58

9 CEDV Gas Gauging ............................................................................................................ 59

9.1 Introduction.................................................................................................................. 59

9.1.1 Main Fuel Gauge Registers...................................................................................... 59

9.1.2 Fuel Gauge Operating Modes ................................................................................... 60

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SLUUBD3D–September 2015–Revised September 2018

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Contents

9.1.3 Full Charge Capacity ............................................................................................. 61

9.1.4 Initial Battery Capacity at Device Reset........................................................................ 62

9.1.5 Capacity Learning (FCC Update) ............................................................................... 62

9.1.6 Qualified Discharge ............................................................................................... 63

9.1.7 End-of-Discharge Thresholds and Capacity Correction...................................................... 64

9.1.8 Reserve Capacity ................................................................................................. 65

9.1.9 EDV Discharge Rate and Temperature Compensation ...................................................... 65

9.1.10 EDV Age Factor .................................................................................................. 66

9.1.11 Self Discharge .................................................................................................... 67

9.1.12 Battery Electronic Load Compensation ....................................................................... 67

9.2 Gauging Configuration Options........................................................................................... 67

10 Lifetime Data Collection ...................................................................................................... 70

10.1 Description .................................................................................................................. 70

10.2 Lifetimes ..................................................................................................................... 71

10.2.1 LifetimeDataBlock1() 0x0060 ................................................................................... 71

10.2.2 LifetimeDataBlock2() 0x0061 ................................................................................... 71

10.2.3 LifetimeDataBlock3() 0x0062 ................................................................................... 71

10.2.4 LifetimeDataBlock4() 0x0063 ................................................................................... 72

10.2.5 LifetimeDataBlock5() 0x0064 ................................................................................... 73

10.2.6 LifetimeDataBlock6() 0x0065 ................................................................................... 73

10.2.7 LifetimeDataBlock7() 0x0066 ................................................................................... 73

11 Device Security .................................................................................................................. 75

11.1 Description .................................................................................................................. 75

11.2 SHA-1 Description.......................................................................................................... 75

11.3 HMAC Description.......................................................................................................... 75

11.4 Authentication............................................................................................................... 75

11.5 Security Modes ............................................................................................................. 76

11.5.1 FULL ACCESS or UNSEALED to SEALED .................................................................. 76

11.5.2 SEALED to UNSEALED......................................................................................... 76

11.5.3 UNSEALED to FULL ACCESS................................................................................. 76

12 Manufacture Production...................................................................................................... 77

12.1 Manufacture Testing ....................................................................................................... 77

12.1.1 Manufacturing Status Configuration ........................................................................... 77

12.2 Calibration................................................................................................................... 78

12.2.1 Cell Voltage Calibration ......................................................................................... 79

12.2.2 External Average Voltage Calibration ......................................................................... 79

12.2.3 VAUX Voltage Calibration....................................................................................... 80

12.2.4 Voltage Calibration Data Flash ................................................................................. 80

12.2.5 Current Calibration ............................................................................................... 80

12.2.6 Deadbands ........................................................................................................ 81

12.2.7 Current Calibration Data Flash ................................................................................. 82

12.2.8 Temperature Calibration......................................................................................... 82

12.2.9 Temperature Calibration Data Flash........................................................................... 82

12.2.10 External Temp Model .......................................................................................... 83

13 Display Port....................................................................................................................... 84

13.1 Introduction.................................................................................................................. 84

13.1.1 Light Emitting Diode (LED) Display Operation ............................................................... 84

13.1.2 Liquid Crystal Display (LCD) Operation ....................................................................... 84

13.2 Display Activation .......................................................................................................... 84

13.2.1 LED Display Activation .......................................................................................... 84

13.2.2 LCD Display Activation .......................................................................................... 85

13.3 State-Of-Charge Display .................................................................................................. 85

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SLUUBD3D–September 2015–Revised September 2018

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Contents

13.4 LED and LCD Display Configuration .................................................................................... 85

13.5 LCD Specific Display Configuration...................................................................................... 86

13.6 LED Configuration Register............................................................................................... 86

14 Host Controlled GPIO ......................................................................................................... 88

14.1 Introduction.................................................................................................................. 88

14.2 Configuring the GPIO...................................................................................................... 88

14.3 Using the GPIO............................................................................................................. 91

15 Key Input........................................................................................................................... 92

15.1 Introduction.................................................................................................................. 92

15.2 Input Configuration......................................................................................................... 92

15.3 Operation.................................................................................................................... 92

16 Communications ................................................................................................................ 93

16.1 Introduction.................................................................................................................. 93

16.2 SMBus On and Off State.................................................................................................. 93

16.3 Packet Error Checking..................................................................................................... 93

16.4 Slave Address .............................................................................................................. 93

16.5 Broadcasts to Smart Charger and Smart Battery Host................................................................ 94

16.6 SMB Configuration Options ............................................................................................... 95

17 SBS Commands ................................................................................................................. 96

17.1 Summary .................................................................................................................... 96

17.2 0x00 ManufacturerAccess() and 0x44 ManufacturerBlockAccess() ................................................. 98

17.2.1 ManufacturerAccess() 0x0000 ManufacturerBlockAccess() or ManufacturerData() ................... 100

17.2.2 ManufacturerAccess() 0x0001 Device Type ................................................................ 100

17.2.3 ManufacturerAccess() 0x0002 Firmware Version .......................................................... 100

17.2.4 ManufacturerAccess() 0x0003 Hardware Version.......................................................... 100

17.2.5 ManufacturerAccess() 0x0004 Instruction Flash Signature ............................................... 100

17.2.6 ManufacturerAccess() 0x0005 Static DF Signature........................................................ 100

17.2.7 ManufacturerAccess() 0x0006 Chemical ID................................................................. 100

17.2.8 ManufacturerAccess() 0x0008 Static Chem DF Signature................................................ 101

17.2.9 ManufacturerAccess() 0x0009 All DF Signature............................................................ 101

17.2.10 ManufacturerAccess() 0x0010 SHUTDOWN Mode ...................................................... 101

17.2.11 ManufacturerAccess() 0x0011 SLEEP Mode.............................................................. 101

17.2.12 ManufacturerAccess() 0x001B Cell Balance Toggle ..................................................... 102

17.2.13 ManufacturerAccess() 0x001C AFE Delay Disable....................................................... 102

17.2.14 ManufacturerAccess() 0x001D SAFE Toggle ............................................................. 102

17.2.15 ManufacturerAccess() 0x001E PRE-CHG FET ........................................................... 102

17.2.16 ManufacturerAccess() 0x001F CHG FET.................................................................. 102

17.2.17 ManufacturerAccess() 0x0020 DSG FET .................................................................. 102

17.2.18 ManufacturerAccess() 0x0022 FET Control ............................................................... 102

17.2.19 ManufacturerAccess() 0x0023 Lifetime Data Collection ................................................. 103

17.2.20 ManufacturerAccess() 0x0024 Permanent Failure........................................................ 103

17.2.21 ManufacturerAccess() 0x0025 Black Box Recorder...................................................... 103

17.2.22 ManufacturerAccess() 0x0026 SAFE....................................................................... 103

17.2.23 ManufacturerAccess() 0x0027 LED Display Enable...................................................... 103

17.2.24 ManufacturerAccess() 0x0028 Lifetime Data Reset ...................................................... 103

17.2.25 ManufacturerAccess() 0x0029 Permanent Fail Data Reset ............................................. 103

17.2.26 ManufacturerAccess() 0x002A Black Box Recorder Reset.............................................. 104

17.2.27 ManufacturerAccess() 0x002B LED TOGGLE ............................................................ 104

17.2.28 ManufacturerAccess() 0x002C LED Display Press....................................................... 104

17.2.29 ManufacturerAccess() 0x002D CALIBRATION Mode ................................................... 104

17.2.30 ManufacturerAccess() 0x0030 Seal Device ............................................................... 104

17.2.31 ManufacturerAccess() 0x0035 Security Keys ............................................................. 104

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