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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32WL55JC датащи(PDF) 44 Page - STMicroelectronics |
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STM32WL55JC датащи(HTML) 44 Page - STMicroelectronics |
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44 / 147 page  Functional overview STM32WL55/54xx 44/147 DS13293 Rev 2 3.26 Public key accelerator (PKA) The PKA is used to compute cryptographic public key primitives, specifically those related to RSA (Rivest, Shamir and Adleman), Diffie-Hellmann or ECC (elliptic curve cryptography) over GF(p) (Galois fields). These operations are executed in the Montgomery domain. 3.27 Timer and watchdog The devices include one advanced 16-bit timer, one general-purpose 32-bit timer, two 16-bit basic timers, three low-power timers, two watchdog timers and a SysTick timer. The table below compares the features of the advanced control, general purpose and basic timers. 3.27.1 Advanced-control timer (TIM1) The advanced-control timer TIM1 can be seen as a three-phase PWM multiplexed on six channels. Each channel has complementary PWM outputs with programmable inserted dead-times. Each channel 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 TIM1 counter can be frozen and the PWM outputs disabled to turn off any power switches driven by these outputs. Many features are shared with those of the general-purpose timers (described in the next section) using the same architecture. TIM1 can then work together with TIM2 via the peripheral interconnect matrix, for synchronization or event chaining. Table 14. Timer features Timer type Timer name Counter resolution (bits) Counter type Prescaler factor DMA request generation Capture/ compare channels Complementary outputs Advanced control TIM1 16 Up, down and up/down Any integer between 1 and 65536 Yes 4 3 General purpose TIM2 32 NA TIM16 16 Up 2 1 TIM17 Low power LPTIM1 LPTIM2 LPTIM3 1 |
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