SLLSFU1A December   2023  – July 2024 MCF8315C

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Characteristics of the SDA and SCL bus for Standard and Fast mode
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Output Stage
      2. 6.3.2  Device Interface
        1. 6.3.2.1 Interface - Control and Monitoring
        2. 6.3.2.2 I2C Interface
      3. 6.3.3  Step-Down Mixed-Mode Buck Regulator
        1. 6.3.3.1 Buck in Inductor Mode
        2. 6.3.3.2 Buck in Resistor mode
        3. 6.3.3.3 Buck Regulator with External LDO
        4. 6.3.3.4 AVDD Power Sequencing from Buck Regulator
        5. 6.3.3.5 Mixed Mode Buck Operation and Control
        6. 6.3.3.6 Buck Under Voltage Protection
        7. 6.3.3.7 Buck Over Current Protection
      4. 6.3.4  AVDD Linear Voltage Regulator
      5. 6.3.5  Charge Pump
      6. 6.3.6  Slew Rate Control
      7. 6.3.7  Cross Conduction (Dead Time)
      8. 6.3.8  Motor Control Input Sources
        1. 6.3.8.1 Analog Mode Motor Control
        2. 6.3.8.2 PWM Mode Motor Control
        3. 6.3.8.3 I2C based Motor Control
        4. 6.3.8.4 Frequency Mode Motor Control
        5. 6.3.8.5 Speed Profiles
          1. 6.3.8.5.1 Linear Reference Profiles
          2. 6.3.8.5.2 Staircase Reference Profiles
          3. 6.3.8.5.3 Forward-Reverse Reference Profiles
      9. 6.3.9  Starting the Motor Under Different Initial Conditions
        1. 6.3.9.1 Case 1 – Motor is Stationary
        2. 6.3.9.2 Case 2 – Motor is Spinning in the Forward Direction
        3. 6.3.9.3 Case 3 – Motor is Spinning in the Reverse Direction
      10. 6.3.10 Motor Start Sequence (MSS)
        1. 6.3.10.1 Initial Speed Detect (ISD)
        2. 6.3.10.2 Motor Resynchronization
        3. 6.3.10.3 Reverse Drive
          1. 6.3.10.3.1 Reverse Drive Tuning
      11. 6.3.11 Motor Start-up
        1. 6.3.11.1 Align
        2. 6.3.11.2 Double Align
        3. 6.3.11.3 Initial Position Detection (IPD)
          1. 6.3.11.3.1 IPD Operation
          2. 6.3.11.3.2 IPD Release Mode
          3. 6.3.11.3.3 IPD Advance Angle
        4. 6.3.11.4 Slow First Cycle Start-up
        5. 6.3.11.5 Open loop
        6. 6.3.11.6 Transition from Open to Closed Loop
      12. 6.3.12 Closed Loop Operation
        1. 6.3.12.1 Closed Loop Acceleration/Deceleration Slew Rate
        2. 6.3.12.2 Speed PI Control
        3. 6.3.12.3 Current PI Control
        4. 6.3.12.4 Torque Mode
        5. 6.3.12.5 Overmodulation
      13. 6.3.13 Motor Parameters
        1. 6.3.13.1 Motor Resistance
        2. 6.3.13.2 Motor Inductance
        3. 6.3.13.3 Motor Back-EMF constant
      14. 6.3.14 Motor Parameter Extraction Tool (MPET)
      15. 6.3.15 Anti-Voltage Surge (AVS)
      16. 6.3.16 Active Braking
      17. 6.3.17 Output PWM Switching Frequency
      18. 6.3.18 PWM Modulation Schemes
      19. 6.3.19 Dead Time Compensation
      20. 6.3.20 Motor Stop Options
        1. 6.3.20.1 Coast (Hi-Z) Mode
        2. 6.3.20.2 Low-Side Braking
        3. 6.3.20.3 Active Spin-Down
      21. 6.3.21 FG Configuration
        1. 6.3.21.1 FG Output Frequency
        2. 6.3.21.2 FG during open loop
        3. 6.3.21.3 FG during idle and fault
      22. 6.3.22 DC Bus Current Limit
      23. 6.3.23 Protections
        1. 6.3.23.1  VM Supply Undervoltage Lockout
        2. 6.3.23.2  AVDD Undervoltage Lockout (AVDD_UV)
        3. 6.3.23.3  BUCK Under Voltage Lockout (BUCK_UV)
        4. 6.3.23.4  VCP Charge Pump Undervoltage Lockout (CPUV)
        5. 6.3.23.5  Overvoltage Protection (OVP)
        6. 6.3.23.6  Overcurrent Protection (OCP)
          1. 6.3.23.6.1 OCP Latched Shutdown (OCP_MODE = 00b)
          2. 6.3.23.6.2 OCP Automatic Retry (OCP_MODE = 01b)
        7. 6.3.23.7  Buck Overcurrent Protection
        8. 6.3.23.8  Hardware Lock Detection Current Limit (HW_LOCK_ILIMIT)
          1. 6.3.23.8.1 HW_LOCK_ILIMIT Latched Shutdown (HW_LOCK_ILIMIT_MODE = 00xxb)
          2. 6.3.23.8.2 HW_LOCK_ILIMIT Automatic recovery (HW_LOCK_ILIMIT_MODE = 01xxb)
          3. 6.3.23.8.3 HW_LOCK_ILIMIT Report Only (HW_LOCK_ILIMIT_MODE = 1000b)
          4. 6.3.23.8.4 HW_LOCK_ILIMIT Disabled (HW_LOCK_ILIMIT_MODE= 1xx1b)
        9. 6.3.23.9  Motor Lock (MTR_LCK)
          1. 6.3.23.9.1 MTR_LCK Latched Shutdown (MTR_LCK_MODE = 00xxb)
          2. 6.3.23.9.2 MTR_LCK Automatic Recovery (MTR_LCK_MODE= 01xxb)
          3. 6.3.23.9.3 MTR_LCK Report Only (MTR_LCK_MODE = 1000b)
          4. 6.3.23.9.4 MTR_LCK Disabled (MTR_LCK_MODE = 1xx1b)
        10. 6.3.23.10 Motor Lock Detection
          1. 6.3.23.10.1 Lock 1: Abnormal Speed (ABN_SPEED)
          2. 6.3.23.10.2 Lock 2: Abnormal BEMF (ABN_BEMF)
          3. 6.3.23.10.3 Lock3: No-Motor Fault (NO_MTR)
        11. 6.3.23.11 Minimum VM (undervoltage) Protection
        12. 6.3.23.12 Maximum VM (overvoltage) Protection
        13. 6.3.23.13 MPET Faults
        14. 6.3.23.14 IPD Faults
        15. 6.3.23.15 Thermal Warning (OTW)
        16. 6.3.23.16 Thermal Shutdown (TSD)
    4. 6.4 Device Functional Modes
      1. 6.4.1 Functional Modes
        1. 6.4.1.1 Sleep Mode
        2. 6.4.1.2 Standby Mode
        3. 6.4.1.3 Fault Reset (CLR_FLT)
    5. 6.5 External Interface
      1. 6.5.1 DRVOFF Functionality
      2. 6.5.2 DAC output
      3. 6.5.3 Oscillator Source
        1. 6.5.3.1 External Clock Source
      4. 6.5.4 External Watchdog
    6. 6.6 EEPROM access and I2C interface
      1. 6.6.1 EEPROM Access
        1. 6.6.1.1 EEPROM Write
        2. 6.6.1.2 EEPROM Read
      2. 6.6.2 I2C Serial Interface
        1. 6.6.2.1 I2C Data Word
        2. 6.6.2.2 I2C Write Transaction
        3. 6.6.2.3 I2C Read Transaction
        4. 6.6.2.4 I2C Communication Protocol Packet Examples
        5. 6.6.2.5 I2C Clock Stretching
        6. 6.6.2.6 CRC Byte Calculation
  8. 7 EEPROM (Non-Volatile) Register Map
    1. 7.1 Algorithm_Configuration Registers
    2. 7.2 Fault_Configuration Registers
    3. 7.3 Hardware_Configuration Registers
    4. 7.4 Internal_Algorithm_Configuration Registers
  9. 8 RAM (Volatile) Register Map
    1. 8.1 Fault_Status Registers
    2. 8.2 System_Status Registers
    3. 8.3 Device_Control Registers
    4. 8.4 Algorithm_Control Registers
    5. 8.5 Algorithm_Variables Registers
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Application Curves
        1. 9.2.1.1 Motor startup
        2. 9.2.1.2 MPET
        3. 9.2.1.3 Dead time compensation
        4. 9.2.1.4 Auto handoff
        5. 9.2.1.5 Anti voltage surge (AVS)
    3. 9.3 Power Supply Recommendations
      1. 9.3.1 Bulk Capacitance
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Thermal Considerations
        1. 9.4.2.1 Power Dissipation
  11. 10Device and Documentation Support
    1. 10.1 Support Resources
    2. 10.2 Trademarks
    3. 10.3 Electrostatic Discharge Caution
    4. 10.4 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.6.2.1 I2C Data Word

The I2C data word format is shown in Table 6-8.

Table 6-8 I2C Data Word Format
TARGET_IDR/WCONTROL WORDDATACRC-8
A6 - A0W0CW23 - CW0D15 / D31/ D63 - D0C7 - C0

Target ID and R/W Bit: The first byte includes the 7-bit I2C target ID, followed by the read/write command bit. Every packet in MCF8315C the communication protocol starts with writing a 24-bit control word and hence the R/W bit is always 0.

24-bit Control Word: The Target Address is followed by a 24-bit control bit. The control word format is shown in Table 6-9.

Table 6-9 24-bit Control Word Format
OP_R/WCRC_ENDLENMEM_SECMEM_PAGEMEM_ADDR
CW23CW22CW21- CW20CW19 - CW16CW15 - CW12CW11 - CW0

Each field in the control word is explained in detail below.

OP_R/W – Read/Write: R/W bit gives information on whether this is a read (1b) operation or write (0b) operation. For write operation, MCF8315C will expect data bytes to be sent after the 24-bit control word. For read operation, MCF8315C will expect an I2C read request with repeated start or normal start after the 24-bit control word.

CRC_EN – Cyclic Redundancy Check(CRC) Enable: MCF8315C supports CRC to verify the data integrity. This bit controls whether the CRC feature is enabled or not.

DLEN – Data Length: DLEN field determines the length of the data that will be sent by external MCU to MCF8315C. MCF8315C protocol supports three data lengths: 16-bit, 32-bit and 64-bit.

Table 6-10 Data Length Configuration
DLEN ValueData Length
00b16-bit
01b32-bit
10b64-bit
11bReserved

MEM_SEC – Memory Section: Each memory location in MCF8315C is addressed using three separate entities in the control word – Memory Section, Memory Page, Memory Address. Memory Section is a 4-bit field which denotes the memory section to which the memory location belongs like RAM, ROM etc.

MEM_PAGE – Memory Page: Memory page is a 4-bit field which denotes the memory page to which the memory location belongs.

MEM_ADDR – Memory Address: Memory address is the last 12-bits of the address. The complete 22-bit address is constructed internally by MCF8315C using all three fields – Memory Section, Memory Page, Memory Address. For memory locations 0x000000-0x000800, memory section is 0x0, memory page is 0x0 and memory address is the lowest 12 bits(0x000 for 0x000000, 0x080 for 0x000080 and 0x800 for 0x000800). All relevant memory locations (EEPROM and RAM variables) have MEM_SEC and MEM_PAGE values both corresponding to 0x0. All other MEM_SEC, MEM_PAGE values are reserved and not for external use.

Data Bytes: For a write operation to MCF8315C, the 24-bit control word is followed by data bytes. The DLEN field in the control word should correspond with the number of bytes sent in this section. In case of mismatch between number of data bytes and DLEN, the write operation is discarded.

CRC Byte: If the CRC feature is enabled in the control word, CRC byte has to be sent at the end of a write transaction. Refer to Section 6.6.2.6 for detailed information on CRC byte calculation.