User - Manual

OV5640 Camera Board (C) User Manual
Version: V1.0 Dec.12 2017 5
and therefore data can be caught at the rising or falling front. These data come to 32-bit
register (DCMI_DR), and then are transmitted via DMA. The image buffer is controlled by DMA,
not by camera interface. Data received from camera can be restored to original image lines of
frames (YUB/RGB modes) or series of JPEG files. To enable receiving JPEG images the JPEG bit
(the 3rd DCMI_CR bit) must be set to 1. Data stream can be synchronized by HSYNC (horizontal
synchronization) signal and VSYNC (vertical synchronization) signal, otherwise by
synchronization signals embedded into the data stream.
DCMI block diagram:
Top-level block diagram:
The DMA interface active when the CAPTURE bit of DCMI_CR is set to 1. Every time the camera
receive full 32-bits block will trigger a DMI request.