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STM32L443CC 数据表(PDF) 39 Page - STMicroelectronics |
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STM32L443CC 数据表(HTML) 39 Page - STMicroelectronics |
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39 / 207 page  DocID028739 Rev 2 39/207 STM32L443CC STM32L443RC STM32L443VC Functional overview 50 The AES peripheral supports: • Encryption/Decryption using AES Rijndael Block Cipher algorithm • NIST FIPS 197 compliant implementation of AES encryption/decryption algorithm • 128-bit and 256-bit register for storing the encryption, decryption or derivation key (4x 32-bit registers) • Electronic codebook (ECB), Cipher block chaining (CBC), Counter mode (CTR), Galois Counter Mode (GCM), Galois Message Authentication Code mode (GMAC) and Cipher Message Authentication Code mode (CMAC) supported. • Key scheduler • Key derivation for decryption • 128-bit data block processing • 128-bit, 256-bit key length • 1x32-bit INPUT buffer and 1x32-bit OUTPUT buffer. • Register access supporting 32-bit data width only. • One 128-bit Register for the initialization vector when AES is configured in CBC mode or for the 32-bit counter initialization when CTR mode is selected, GCM mode or CMAC mode. • Automatic data flow control with support of direct memory access (DMA) using 2 channels, one for incoming data, and one for outcoming data. • Suspend a message if another message with a higher priority needs to be processed 3.24 Timers and watchdogs The STM32L443xx includes one advanced control timers, up to five general-purpose timers, two basic timers, two 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. Table 8. Timer feature comparison Timer type Timer Counter resolution Counter type Prescaler factor DMA request generation Capture/ compare channels Complementary outputs Advanced control TIM1 16-bit Up, down, Up/down Any integer between 1 and 65536 Yes 4 3 General- purpose TIM2 32-bit Up, down, Up/down Any integer between 1 and 65536 Yes 4 No General- purpose TIM15 16-bit Up Any integer between 1 and 65536 Yes 2 1 General- purpose TIM16 16-bit Up Any integer between 1 and 65536 Yes 1 1 Basic TIM6, TIM7 16-bit Up Any integer between 1 and 65536 Yes 0 No |
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