ADSP-BF531/ADSP-BF532/ADSP-BF533
DATA RECEIVE—INTERNAL CLOCK
DATA RECEIVE—EXTERNAL CLOCK
DRIVE EDGE
SAMPLE EDGE
DRIVE EDGE
SAMPLE EDGE
tSCLKE
tSCLKIW
tSCLKEW
RSCLKx
RSCLKx
tDFSI
tDFSE
tHOFSI
tHOFSE
RFSx
RFSx
(OUTPUT)
(OUTPUT)
tSFSI
tHFSI
tSFSE
tHFSE
RFSx
RFSx
(INPUT)
(INPUT)
tHDRE
tSDRI
tHDRI
tSDRE
DRx
DRx
DATA TRANSMIT—INTERNAL CLOCK
DRIVE EDGE
DATA TRANSMIT—EXTERNAL CLOCK
DRIVE EDGE SAMPLE EDGE
SAMPLE EDGE
tSCLKE
tSCLKIW
tSCLKEW
TSCLKx
TSCLKx
tDFSI
tDFSE
tHOFSI
tHOFSE
TFSx
TFSx
(OUTPUT)
(OUTPUT)
tSFSI
tHFSI
tSFSE
tHFSE
TFSx
TFSx
(INPUT)
(INPUT)
tDDTI
tDDTE
tHDTI
tHDTE
DTx
DTx
Figure 23. Serial Ports
TSCLKx
(INPUT)
tSUDTE
TFSx
(INPUT)
RSCLKx
(INPUT)
tSUDRE
RFSx
(INPUT)
FIRST
TSCLKx/RSCLKx
EDGE AFTER
SPORT ENABLED
Figure 24. Serial Port Start Up with External Clock and Frame Sync
Rev. I
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Page 35 of 64
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August 2013
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