MCT8317A datasheet(66/161 Pages) TI1

66 / 161 page

8.6 EEPROM access and I2C interface

8.6.1 EEPROM Access

MCT8317A has 1024 bits (16 rows of 64 bits each) of EEPROM, which are used to store the motor configuration

parameters. Erase operations are row-wise (all 64 bits are erased in a single erase operation), but 32-bit write

and read operations are supported. EEPROM can be written and read using the I2C serial interface but erase

cannot be performed using I2C serial interface. The shadow registers corresponding to the EEPROM are located

at addresses 0x000080-0x0000AE.

Note

MCT8317A allows EEPROM write and read operations only when the motor is not spinning.

8.6.1.1 EEPROM Write

In MCT8317A, EEPROM write procedure is as follows,

1. Write register 0x000080 (ISD_CONFIG) with ISD configuration like resync enable, reverse drive enable,

stationary detect threshold etc.,

2. Write register 0x000082 (MOTOR_STARTUP1) with motor start-up configuration like start-up method, first

cycle frequency, IPD parameters, align parameters etc.,

3. Write register 0x000084 (MOTOR_STARTUP2) with motor start-up configuration like open loop acceleration,

minimum duty cycle etc.,

4. Write register 0x000086 (CLOSED_LOOP1) with motor control configuration like closed loop acceleration,

PWM frequency, PWM modulation etc.,

5. Write register 0x000088 (CLOSED_LOOP2) with motor control configuration like FG signal parameters,

motor stop options etc.,

6. Write register 0x00008A (CLOSED_LOOP3) with motor control configuration like fast start-up and dynamic

degauss parameters including BEMF thresholds, duty cycle thresholds etc.,

7. Write register 0x00008C (CLOSED_LOOP4) with motor control configuration like fast deceleration

parameters including fast deceleration duty threshold, window, current limits etc.,

8. Write register 0x00008E (CONST_SPEED) with motor control configuration like speed loop parameters

including closed loop mode, saturation limits, Kp, Ki etc.,

9. Write register 0x000090 (CONST_PWR) with motor control configuration like input power regulation

parameters including maximum power, constant power mode, power level hysteresis, maximum speed etc.,

10. Write register 0x000092 (FAULT_CONFIG1) with fault control configuration like CBC, lock current limits and

actions, retry times etc.,

11. Write register 0x000094 (FAULT_CONFIG2) with fault control configuration like OV, UV limits and actions,

abnormal speed level, motor lock setting etc.,

12. Write registers 0x000096 and 0x000098 (150_DEG_TWO_PH_PROFILE,

150_DEG_THREE_PH_PROFILE) with PWM duty cycle configurations for 150o modulation.

13. Write registers 0x00009A and 0x00009C (TRAP_CONFIG1 and TRAP_CONFIG2) with algorithm

parameters like ISD BEMF threshold, blanking time, AVS current limits etc.,

14. Write registers 0x0000A4 and 0x0000A6 (PIN_CONFIG1 and PIN_CONFIG2) with pin configuration for DIR,

BRAKE, DACOUT1 and DACOUT2, SOX, external watchdog etc.,

15. Write register 0x0000A8 (DEVICE_CONFIG) with device configuration like device mode, external clock

enable, clock source, speed input PWM frequency range etc.,

16. Write registers 0x0000AC and 0x0000AE (GD_CONFIG1 and GD_CONFIG2) with gate driver configuration

like slew rate, CSA gain, OCP level, mode, OVP enable etc.,

17. Write 0x8A500000 into register 0x0000E6 to write the shadow register (0x000080-0x0000AE) values into the

EEPROM.

18. Wait for 100ms for the EEPROM write operation to complete

Steps 1-16 can be selectively executed based on registers/parameters that need to be modified. After all shadow

registers have been updated with the required values, step 17 should be executed to copy the contents of the

shadow registers into the EEPROM.

MCT8317A

SLLSFQ2 – JANUARY 2023

www.ti.com

Submit Document Feedback

Product Folder Links: MCT8317A

MCT8317A Scheda tecnica(PDF) 66 Page - Texas Instruments

MCT8317A Scheda tecnica(HTML) 66 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Scheda tecnica Scarica

Link URL