9System Interface
9 – 11
Serial Port Control Registers (memory-mapped, one set per SPORT)
ISCLK Internal serial clock 0 unchanged
RFSR, TFSR Frame sync required 0 unchanged
RFSW, TFSW Frame sync width 0 unchanged
IRFS, ITFS Internal frame sync 0 unchanged
INVRFS, INVTFS Invert frame sense 0 unchanged
DTYPE Companding type, format 0 unchanged
SLEN Serial word length 0 unchanged
SCLKDIV Serial clock divide undefined unchanged
RFSDIV RFS divide undefined unchanged
Multichannel word enable bits undefined unchanged
MCE Multichannel enable 0 unchanged
MCL Multichannel length 0 unchanged
MFD Multichannel frame delay 0 unchanged
INVTDV Invert transmit data valid 0 unchanged
RBUF, TBUF Autobuffering enable 0 0
TIREG, RIREG Autobuffer I index undefined unchanged
TMREG, RMREG Autobuffer M index undefined unchanged
FO (SPORT1 only) Flag Out value undefined unchanged
CLKODIS CLKOUT disable 0 unchanged
BIASRND MAC biased rounding 0 unchanged
External Memory Control Registers (non-memory-mapped)
DMOVLAY Data memory overlay select 0 unchanged
PMOVLAY Program memory overlay select 0 unchanged
(memory-mapped)
DWAIT Data memory overlay wait states 0x7 unchanged
PWAIT Program memory overlay wait states 0x7 unchanged
BMWAIT Byte memory wait states 0x7 unchanged
IOWAIT0-3 I/O memory wait states 0x7 unchanged
CMSSEL Composite memory select 0xB unchanged
Programmable Flag Data & Control Registers (memory-mapped)
PFDATA Programmable flag data undefined unchanged
PFTYPE Programmable flag direction 0 unchanged
DMA Control Registers (memory-mapped)
IDMAA IDMA Internal Memory Address 0x00 unchanged
IDMAD IDMA Destination Memory Type 0 unchanged
BIAD BDMA Internal Memory Address 0 0x20*
BEAD BDMA External Memory Address 0 0x60*
BTYPE BDMA Transfer Word Type 0 unchanged
BDIR BDMA Transfer Direction 0 unchanged
BCR BDMA Context Reset 1 unchanged
BWCOUNT BDMA Word Count 0x20 0*
BMPAGE External Byte Memory Page 0 0*
Table 9.6 ADSP-2181 State After Reset Or Software Reboot
* These values assume that you have just completed an initial BDMA boot load of the
ADSP-2181 (MMAP=0 & BMODE=0). For more information on BDMA register contents
during the boot loading process see Table 9.8. These values will vary with a processor
reboot (other than initial load), since they depend on the previous values.
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