ZHCSH31B August 2017 – February 2018 DRV10987
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 說明 （續）
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3 Feature Description
- 8.4
Device Functional Modes
- 8.4.1 Motor Parameters
- 8.4.2 Starting the Motor Under Different Initial Conditions
- 8.4.3 Motor Start Sequence
- 8.4.4 Align Current
- 8.4.5 Start-Up Current Setting
- 8.4.6 Closed Loop
- 8.4.7 Current Limits
- 8.4.8 Lock Detect and Fault Handling
- 8.4.9 Anti-Voltage Surge Function
- 8.4.10 PWM Output
- 8.4.11 FG Customized Configuration
- 8.4.12
Diagnostics and Visibility
- 8.4.12.1 Motor-Status Readback
- 8.4.12.2 Motor-Speed Readback
- 8.4.12.3 Motor Electrical-Period Readback
- 8.4.12.4 BEMF Constant Readback
- 8.4.12.5 Motor Estimated Position by IPD
- 8.4.12.6 Supply-Voltage Readback
- 8.4.12.7 Speed-Command Readback
- 8.4.12.8 Speed-Command Buffer Readback
- 8.4.12.9 Fault Diagnostics
- 8.5
Register Maps
- 8.5.1 I2C Serial Interface
- 8.5.2 Register Map
- 8.5.3
Register Descriptions
- 8.5.3.1 FaultReg Register (address = 0x00) [reset = 0x00]
- 8.5.3.2 MotorSpeed Register (address = 0x01) [reset = 0x00]
- 8.5.3.3 MotorPeriod Register (address = 0x02) [reset = 0x00]
- 8.5.3.4 MotorKt Register (address = 0x03) [reset = 0x00]
- 8.5.3.5 MotorCurrent Register (address = 0x04) [reset = 0x00]
- 8.5.3.6 IPDPosition–SupplyVoltage Register (address = 0x05) [reset = 0x00]
- 8.5.3.7 SpeedCmd–spdCmdBuffer Register (address = 0x06) [reset = 0x00]
- 8.5.3.8 AnalogInLvl Register (address = 0x07) [reset = 0x00]
- 8.5.3.9 DeviceID–RevisionID Register (address = 0x08) [reset = 0x00]
- 8.5.3.10 Unused Registers (addresses = 0x011 Through 0x2F)
- 8.5.3.11 SpeedCtrl Register (address = 0x30) [reset = 0x00]
- 8.5.3.12 EEPROM Programming1 Register (address = 0x31) [reset = 0x00]
- 8.5.3.13 EEPROM Programming2 Register (address = 0x32) [reset = 0x00]
- 8.5.3.14 EEPROM Programming3 Register (address = 0x33) [reset = 0x00]
- 8.5.3.15 EEPROM Programming4 Register (address = 0x34) [reset = 0x00]
- 8.5.3.16 EEPROM Programming5 Register (address = 0xYY) [reset = 0x00]
- 8.5.3.17 EEPROM Programming6 Register (address = 0x36) [reset = 0x00]
- 8.5.3.18 Unused Registers (addresses = 0x37 Through 0x5F)
- 8.5.3.19 EECTRL Register (address = 0x60) [reset = 0x00]
- 8.5.3.20 Unused Registers (addresses = 0x61 Through 0x8F)
- 8.5.3.21 CONFIG1 Register (address = 0x90) [reset = 0x00]
- 8.5.3.22 CONFIG2 Register (address = 0x91) [reset = 0x00]
- 8.5.3.23 CONFIG3 Register (address = 0x92) [reset = 0x00]
- 8.5.3.24 CONFIG4 Register (address = 0x93) [reset = 0x00]
- 8.5.3.25 CONFIG5 Register (address = 0x94) [reset = 0x00]
- 8.5.3.26 CONFIG6 Register (address = 0x95) [reset = 0x00]
- 8.5.3.27 CONFIG7 Register (address = 0x96) [reset = 0x00]
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機械、封裝和可訂購信息
8.4.12.8 Speed-Command Buffer Readback
If software current limit and AVS are enabled, the PWM duty cycle output (read back at spdCmdBuffer) may not always match the input command (read back at SpeedCmd) shown in Figure 44. See Anti-Voltage Surge Function and Current Limits.
By reading the value of spdCmdBuffer, the user can observe buffered speed command (output PWM duty cycle) to the motor.
Equation 15 shows how the buffered speed is calculated.
Equation 15. DutyOUTPUT (%) = spdCmdBuffer × 100 / 255
where
- DutyOUTPUT = The maximum duty cycle of the output PWM, which represents the output amplitude as a percentage.
- spdCmdBuffer = Register value
