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EM_D[31:16]/UHPI_HA[15:0]
(A)
UHPI_HCNTL[1:0]
UHPI_HD[15:0]
UHPI_HD[16]/HHWIL
UHPI_HD[31:17]
UHPI_HAS
(B)
UHPI_HBE[3:0]
UHPI_HRW
UHPI_HDS[2]
UHPI_HDS[1]
UHPI_HCS
UHPI_HRDY
AMUTE2/HINT
NC
A[x:y]
(C)
D[15:0]
D[16]
BE[3:0
]
(D)
R/W
WE
(E)
RD
(E)
CS
RDY
INTERRUPT
DSP External Host MCU
D[31:17]
TMS320C6727,TMS320C6726,TMS320C6722
Floating-PointDigitalSignalProcessors
SPRS268E–MAY2005–REVISEDJANUARY2007
Figure4-16illustratestheMultiplexedHostAddress/DataFullwordModehookupbetweentheC672xDSP
andanexternalhostmicrocontroller.Inthismode,all32bitsofUHPI_HD[31:0]areusedandthehostcan
accessHPIA,HPID,andHPICinasinglebuscycle.
A.MaybeusedasEM_D[31:16]
B.Optionalforhostssupportingmultiplexedaddressanddata.Pullupifnotused.Lowwhenaddressisonthebus.
C.TwohostaddresslinesorhostGPIOifaddresslinesarenotavailable.
D.ByteEnables(activeduringreadsandwrites).Someprocessorssupportabyte-enablemodeontheirwriteenable
pins.
E.Onlyrequiredifneededforstrobetiming.NotrequiredifCSmeetsstrobetimingrequirements.
Figure4-16.UHPIMultiplexedHostAddress/DataFullwordMode
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