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DRA821U4...ALM 数据表(PDF) 159 Page - Texas Instruments |
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DRA821U4...ALM 数据表(HTML) 159 Page - Texas Instruments |
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159 / 252 page  NO. PARAMETER DESCRIPTION MIN MAX UNIT PWM7 tw(TZ) Pulse duration, TZx input low (asynchronous) 2 + 3P (1) ns (1) P = sysclk period in ns EHRPWM_TZn_IN PWM7 EPERIPHERALS_TIMNG_07 EHRPWM_SYNCI PWM6 Figure 7-55. ePWM_SYNCI and ePWM_TZn_IN Output Timings For more information, see Enhanced Pulse Width Modulation (EPWM) Module section in Peripherals chapter in the device TRM. 7.9.5.7 EQEP The supported features by the device EQEP are: • Input Synchronization • Three Stage/Six Stage Digital Noise Filter • Quadrature Decoder Unit • Position Counter and Control unit for position measurement • Quadrature Edge Capture unit for low speed measurement • Unit Time base for speed/frequency measurement • Watchdog Timer for detecting stalls Table 7-35 represents EQEP timing conditions. Table 7-35. EQEP Timing Conditions PARAMETER DESCRIPTION MIN MAX UNIT Input Conditions SRI Input slew rate 1 4 V/ns Output Conditions CL Output load capacitance 2 7 pF Section 7.9.5.7.1 and Section 7.9.5.7.2 present timing requirements and switching characteristics for EQEP (see Figure 7-56). 7.9.5.7.1 Timing Requirements for EQEP NO. PARAMETER DESCRIPTION MIN MAX UNIT QEP1 tw(QEP) Pulse duration, QEP_A/B 2 + 2P (1) ns QEP2 tw(QEPIH) Pulse duration, QEP_I high 2 + 2P (1) ns QEP3 tw(QEPIL) Pulse duration, QEP_I low 2 + 2P (1) ns QEP4 tw(QEPSH) Pulse duration, QEP_S high 2 + 2P (1) ns www.ti.com DRA821U-Q1 SPRSP57D – APRIL 2020 – REVISED DECEMBER 2022 Copyright © 2022 Texas Instruments Incorporated Submit Document Feedback 159 Product Folder Links: DRA821U-Q1 |
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