RM0390 Rev 4 435/1328
RM0390 Digital camera interface (DCMI)
448
pixel , encoded in 8 bits, is stored as shown in Table 104.
The result is a monochrome image having the same resolution as the original YCbCr data.
15.5.6 Half resolution image extraction
This is a modification of the previous reception modes, being applicable to monochrome,
RGB or Y extraction modes.
This mode allows to only store a half resolution image. It is selected through OELS and LSM
control bits.
15.6 DCMI interrupts
Five interrupts are generated. All interrupts are maskable by software. The global interrupt
(IT_DCMI) is the OR of all the individual interrupts. Table 105 gives the list of all interrupts.
15.7 DCMI register description
All DCMI registers have to be accessed as 32-bit words, otherwise a bus error occurs.
15.7.1 DCMI control register (DCMI_CR)
Address offset: 0x00
Reset value: 0x0000 0000
Table 104. Data storage in YCbCr progressive video format - Y extraction mode
Byte address 31:24 23:16 15:8 7:0
0 Y n + 3 Y n + 2 Y n + 1 Y n
4 Y n + 7 Y n + 6 Y n + 5 Y n + 4
Table 105. DCMI interrupts
Interrupt name Interrupt event
IT_LINE Indicates the end of line
IT_FRAME Indicates the end of frame capture
IT_OVR indicates the overrun of data reception
IT_VSYNC Indicates the synchronization frame
IT_ERR
Indicates the detection of an error in the embedded synchronization frame
detection
IT_DCMI Logic OR of the previous interrupts
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