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STM32F217VG 数据表(PDF) 31 Page - STMicroelectronics |
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STM32F217VG 数据表(HTML) 31 Page - STMicroelectronics |
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31 / 173 page  STM32F21xxx Description Doc ID 17050 Rev 8 31/173 2.2.30 Audio PLL (PLLI2S) The devices feature an additional dedicated PLL for audio I2S application. It allows to achieve error-free I2S sampling clock accuracy without compromising on the CPU performance, while using USB peripherals. The PLLI2S configuration can be modified to manage an I2S sample rate change without disabling the main PLL (PLL) used for CPU, USB and Ethernet interfaces. The audio PLL can be programmed with very low error to obtain sampling rates ranging from 8 kHz to 192 kHz. In addition to the audio PLL, a master clock input pin can be used to synchronize the I2S flow with an external PLL (or Codec output). 2.2.31 Digital camera interface (DCMI) The camera interface is not available in STM32F215xx devices. STM32F217xx products embed a camera interface that can connect with camera modules and CMOS sensors through an 8-bit to 14-bit parallel interface, to receive video data. The camera interface can sustain up to 27 Mbyte/s at 27 MHz or 48 Mbyte/s at 48 MHz. It features: ● Programmable polarity for the input pixel clock and synchronization signals ● Parallel data communication can be 8-, 10-, 12- or 14-bit ● Supports 8-bit progressive video monochrome or raw Bayer format, YCbCr 4:2:2 progressive video, RGB 565 progressive video or compressed data (like JPEG) ● Supports continuous mode or snapshot (a single frame) mode ● Capability to automatically crop the image |
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