STM32. L4x6. ADC ( Analog to Digital Converter )

 

 

 

	개요. STM32L4x6 ADC
	3개의 ADC : ADC1, ADC2, ADC3    ADC 타입, 해상도 : SAR, 12bit.  ADC 채널 : 20 multiplexed channels.   특징들.    • High-performance features   – Up to 3 ADCs, out of which two of them can operate in dual mode:        ADC1 is connected to 16 external channels + 3 internal channels        ADC2 is connected to 16 external channels + 2 internal channels        ADC3 is connected to 12 external channels + 4 internal channels   – 12, 10, 8 or 6-bit configurable resolution   – ADC conversion time:        Fast channels: 0.188 µs for 12-bit resolution (5.33 Ms/s)        Slow channels: 0.238 µs for 12-bit resolution (4.21 Ms/s)   – ADC conversion time is independent from the AHB bus clock frequency   – Faster conversion time by lowering resolution: 0.16 µs for 10-bit resolution   – Manage single-ended or differential inputs   – AHB slave bus interface to allow fast data handling   – Self-calibration   – Channel-wise programmable sampling time   – Up to four injected channels (analog inputs assignment to regular or injected channels is fully configurable)   – Hardware assistant to prepare the context of the injected channels to allow fast context switching   – Data alignment with in-built data coherency   – Data can be managed by GP-DMA for regular channel conversions   – Data can be routed to DFSDM for post processing   – 4 dedicated data registers for the injected channels    • Oversampler    – 16-bit data register    – Oversampling ratio adjustable from 2 to 256x    – Programmable data shift up to 8-bit    • Low-power features    – Speed adaptive low-power mode to reduce ADC consumption when operating at low frequency    – Allows slow bus frequency application while keeping optimum ADC performance (0.188 µs conversion time for fast channels can be kept whatever the AHB bus clock frequency)    – Provides automatic control to avoid ADC overrun in low AHB bus clock frequency application (auto-delayed mode)    • Several external analog input channel per ADC    – Up to 5 fast channels from GPIO pads    – Up to 11 slow channels from GPIO pads    • In addition, there are several internal dedicated channels    – The internal reference voltage (VREFINT), connected to ADC1    – The internal temperature sensor (VSENSE), connected to ADC1 and ADC3    – The V BAT monitoring channel (VBAT/3), connected to ADC1 and ADC3  – DAC1 internal channels, connected to ADC2 and ADC3    • Start-of-conversion can be initiated:    – by software for both regular and injected conversions    – by hardware triggers with configurable polarity (internal timers events or GPIO input events) for both regular and injected conversions     • Conversion modes   – Each ADC can convert a single channel or can scan a sequence of channels    – Single mode converts selected inputs once per trigger    – Continuous mode converts selected inputs continuously    – Discontinuous mode • Dual ADC mode for ADC1 and 2    • Interrupt generation at ADC ready, the end of sampling, the end of conversion (regular or injected), end of sequence conversion (regular or injected), analog watchdog 1, 2 or 3 or overrun events    • 3 analog watchdogs per ADC  • ADC input range: VREF– ≤ VIN ≤ VREF+   본 글의 정보소스 :  RM0351 STM32L4x6 Reference Manual page 504~

 

 

 

 

 

 

	ADC 기능블럭.

 

Channel 입력단 상세

 

 

 

 

 

 

 

 

ADC 실전 활용예

STM32. ADC 활용 방법

 

 

 

상위 정리

 

STM32. nRF52. ESP32. EFM8. EFM32. PSoC 활용 정리.

 

 

---

첫 등록 : 2018.12.08

최종 수정 : 

단축 주소 : https://igotit.tistory.com/1961