Manual

926
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
45.4.3 ISI Status Register
Register Name: ISI_SR
Access Type: Read
Reset Value: 0x0
• SOF: Start of frame
0: No start of frame has been detected.
1: A start of frame has been detected.
• DIS: Image Sensor Interface disable
0: The image sensor interface is enabled.
1: The image sensor interface is disabled and stops capturing data. The DMA controller and the core can still read the
FIFOs.
• SOFTRST: Software reset
0: Software reset not asserted or not completed.
1: Software reset has completed successfully.
• CDC_PND: Codec request pending
0: No request asserted.
1: A codec request is pending. If a codec request is asserted during a frame, the CDC_PND bit rises until the start of a new
frame. The capture is completed when the flag FO_C_EMP = 1.
• CRC_ERR: CRC synchronization error
0: No crc error in the embedded synchronization frame (SAV/EAV)
1: The CRC_SYNC is enabled in the control register and an error has been detected and not corrected. The frame is dis-
carded and the ISI waits for a new one.
• FO_C_OVF: FIFO codec overflow
0: No overflow
1: An overrun condition has occurred in input FIFO on the codec path. The overrun happens when the FIFO is full and an
attempt is made to write a new sample to the FIFO.
• FO_P_OVF: FIFO preview overflow
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
––––––FR_OVRFO_C_EMP
76543210
FO_P_EMP FO_P_OVF FO_C_OVF CRC_ERR CDC_PND SOFTRST DIS SOF