Data Sheet
Table Of Contents
- 1Overview
- 2Chip Dimensions
- 3Pin Definition
- 4Functional Description
- 4.1Direct Memory Access Controller (DMA)
- 4.2Independent Watchdog(IWDG)
- 4.3Window Watchdog(WWDG)
- 4.4General Purpose and Alternate Function(GPIO and AF
- 4.5Peripheral Interconnection
- 4.6Elliptic Curve Cryptography(ECC)
- 4.7Encryption(AES/DES)
- 4.8True Random Number Generator(TRNG)
- 4.9Calculating Accelerator(CALC)
- 4.10Advanced Timer(ADTIM)
- 4.11General-Purpose Timer(GPTIMC)
- 4.12Basic Timer(BSTIM)
- 4.13Low-Power Timer(LPTIM)
- 4.14Analog-to-Digital Converter(ADC)
- 4.15Real Time Clock(RTC)
- 4.16Inter-Integrated Circuit Interface(I2C)
- 4.17Serial Peripheral Interface 1(LSSPI)
- 4.18Serial Peripheral Interface 2(SPI2)
- 4.19Universal Asynchronous Receiver Transmitter(UART)
- 4.20Audio Interface (PDM)
- 4.21BLE
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Programmable bit order with MSB or LSB first
Simple half duplex communication
Switch TX / RX pin configuration
Disconnection signal transmission ability of LIN master and disconnection signal detection
ability of LIN slave
When the UART is set to LIN mode, there are a 13-bit disconnect signal generator and
disconnect signal detection functions
Smartcard mode
Support T=0 and T=1 Smartcard asynchronous protocol declared by ISO/IEC7816-3
standard
1.5 stop bit length used in Smartcard
Support ModBus communication
Timeout detection function
CR/LF character recognition
Noise detection
4.20 Audio Interface (PDM)
PDM (Pulse Density Modulation) is a modulation technique that uses digital signals to represent analog
signals. PCM, also as a technique of converting analog to digital by taking regular samples at uniform
intervals, expresses the amplitude of each sampled analog signal as N-bit digital component
(N=quantization depth). So the result of each sample in PCM method is always data of N-bit word length.
PDM uses a clock with a sampling rate much higher than PCM’s to sample and modulate the analog
components, and only one bit is output, either 0 or 1. Therefore, digital audio expressed by PDM is also
called Oversampled 1-bit Audio. Compared with a series of 0 and 1 in PDM, the quantization result of
PCM is more intuitive and simple.
4.21 BLE
BLE5.0/5.1 protocol.