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MCT8316AV Datasheet(PDF) 46 Page - Texas Instruments |
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MCT8316AV Datasheet(HTML) 46 Page - Texas Instruments |
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46 / 179 page  8.3.10 Motor Start Sequence (MSS) Figure 8-19 shows the motor-start sequence implemented in the MCT8316A device. Power On ISD_EN RVS_DR_EN Motor Start-up Direc on of Spin Closed Loop HIZ_EN Forward Reverse N Y N Y BRK_TIME N N Y Hi-Z Time > HIZ_TIME Speed > Open to Closed Loop Hando Is motor sta onary BRAKE_EN Brake Time > BRK_TIME Y N Y BRK_CONFIG Brake Current < BRK_CURR_THR N Brake_Rou ne N Y Brake_Rou ne Brake_Rou ne_End N Y N Y DIR Change RESYNC_EN Y Y N Open loop BRK_CURR Y STAT_BRK_EN N Y Brake Time > STARTUP_ BRK_TIME Y N Reverse Closed Loop Decelera on Reverse Open Loop Decelera on Direc on Reversal : Zero Speed Crossover Y BEMF > RESYNC_MIN_THRES HOLD N Y Figure 8-19. Motor Starting-Up Flow Power-On State This is the initial state of the Motor Start Sequence (MSS). The MSS starts in this state on initial power-up or whenever the MCT8316A device comes out of standby or sleep mode. DIR Change Judgement In MCT8316A, if direction change command is detected at start of MSS, the motor direction detected in ISD is assumed to be opposite to commanded direction and reverse drive is performed if RVS_DR_EN is set to 1b. ISD_EN Judgement After power-on, the MCT8316A MSS enters the ISD_EN judgement where it checks to see if the initial speed detect (ISD) function is enabled (ISD_EN = 1b). If ISD is disabled, the MSS proceeds directly to the BRAKE_EN judgement. If ISD is enabled, MSS advances to the ISD (Is Motor Stationary) state. ISD State The MSS determines the initial condition (speed, direction of spin) of the motor (see Initial Speed Detect (ISD)). If motor is deemed to be MCT8316A SLLSFH8A – AUGUST 2021 – REVISED DECEMBER 2021 www.ti.com 46 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: MCT8316A |
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