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STM32H523VCU7 Datasheet(PDF) 43 Page - STMicroelectronics |
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STM32H523VCU7 Datasheet(HTML) 43 Page - STMicroelectronics |
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43 / 228 page  DS14540 Rev 1 43/228 STM32H523xx Functional overview 57 3.30 Public key accelerator (PKA) The PKA (Public Key Accelerator) can verify ECDSA signatures, with all needed computation performed within the accelerator. Application CPU is only needed to manage the inputs and the outputs of the operation. The PKA main features are: • ECDSA signature verification • Capability to handle operands up to 640 bits • AMBA AHB slave peripheral, accessible through 32-bit word single accesses only (otherwise an AHB bus error is generated, and write accesses are ignored) 3.31 Timers and watchdogs The devices include two advanced control timers, up to seven general-purpose timers, two basic timers, six low-power timers, two watchdog timers and two SysTick timers. Table 6 compares the features of the advanced control, general-purpose and basic timers. 3.31.1 Advanced-control timers (TIM1, TIM8) These timers can be seen as a three-phase PWM multiplexed on six channels. They have complementary PWM outputs with programmable inserted dead-times. They can also be seen as complete general-purpose timers. The four independent channels can be used for: • Input capture • Output compare • PWM generation (edge or center-aligned modes) with full modulation capability (0 - 100 %) • One-pulse mode output In Debug mode, the advanced-control timer counter can be frozen and the PWM outputs disabled to turn off any power switches driven by these outputs. Table 6. Timer features Type Timer Counter resolution Counter type Prescaler factor DMA request generation Capture/ compare channels Complementary outputs Advanced control TIM1, TIM8 16 bits Up, down, up/down Any integer between 1 and 65536 Yes 43 General purpose TIM2, TIM5 32 bits 4 No TIM3, TIM4 16 bits 4 No General purpose TIM12, TIM15 16 bits Up 2 1 Basic TIM6, TIM7 16 bits Up 0 No |
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