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TMS320F28075PZP Datasheet(PDF) 111 Page - Texas Instruments |
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TMS320F28075PZP Datasheet(HTML) 111 Page - Texas Instruments |
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111 / 192 page  7.11.2.2 ePWM Electrical Data and Timing Section 7.11.2.2.1 shows the PWM timing requirements and Section 7.11.2.2.2 shows the PWM switching characteristics. 7.11.2.2.1 ePWM Timing Requirements MIN(1) MAX UNIT f(EPWM) Frequency, EPWMCLK(2) 100 MHz tw(SYNCIN) Sync input pulse width Asynchronous 2tc(EPWMCLK) cycles Synchronous 2tc(EPWMCLK) cycles With input qualifier 1tc(EPWMCLK) + tw(IQSW) cycles (1) For an explanation of the input qualifier parameters, see Section 7.9.6.2.1. (2) For SYSCLK above 100 MHz, the EPWMCLK must be half of SYSCLK. 7.11.2.2.2 ePWM Switching Characteristics over recommended operating conditions (unless otherwise noted) PARAMETER MIN MAX UNIT tw(PWM) Pulse duration, PWMx output high/low 20 ns tw(SYNCOUT) Sync output pulse width 8tc(SYSCLK) cycles td(TZ-PWM) Delay time, trip input active to PWM forced high Delay time, trip input active to PWM forced low Delay time, trip input active to PWM Hi-Z 25 ns 7.11.2.2.3 Trip-Zone Input Timing Section 7.11.2.2.3.1 shows the trip-zone input timing requirements. Figure 7-48 shows the PWM Hi-Z characteristics. 7.11.2.2.3.1 Trip-Zone Input Timing Requirements MIN(1) MAX UNIT tw(TZ) Pulse duration, TZx input low Asynchronous 1tc(EPWMCLK) cycles Synchronous 2tc(EPWMCLK) cycles With input qualifier 1tc(EPWMCLK) + tw(IQSW) cycles (1) For an explanation of the input qualifier parameters, see Section 7.9.6.2.1. PWM (B) TZ (A) EPWMCLK t w(TZ) t d(TZ-PWM) A. TZ: TZ1, TZ2, TZ3, TRIP1–TRIP12 B. PWM refers to all the PWM pins in the device. The state of the PWM pins after TZ is taken high depends on the PWM recovery software. Figure 7-48. PWM Hi-Z Characteristics www.ti.com TMS320F28076, TMS320F28075 SPRS902J – OCTOBER 2014 – REVISED FEBRUARY 2021 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 111 Product Folder Links: TMS320F28076 TMS320F28075 |
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