12-8
DSP56305 User’s Manual
MOTOROLA
Filter Co-Processor
Programming Model
Reads and writes of data and non-data are treated differently, as detailed below in Table
12-3.
12.4.2
FCOP Data Input Register (FDIR)
The FCOP Data Input Register (FDIR) is a 4-word deep 16-bit wide FIFO used for
DSP-to-FCOP data transfers. Up to four data samples can be written into FDIR using the
same address. Data from FDIR is transferred to the FCOP Data Memory bank (FDM) for
filter processing. For proper operation, data should be written to FDIR only if the FDIBE
status bit is set, indicating that the FIFO is empty. Writing to FDIR clears FDIBE. The
user may use interrupt requests or DMA requests to trigger the DSP56300 core for data
transfers. FDIR can be written by the DSP56300 core and DMA. FDIR is also referred to
as the FCOP Data Input Buffer.
12.4.3
FCOP Data Output Register (FDOR)
The FCOP Data Output Register (FDOR) is a 16-bit wide, read-only register used for
FCOP-to-DSP data transfers. Data is transferred from the FMAC to FDOR after
processing of all filter taps is completed for a specific set of input samples, that is, after
filter processing has been completed. For proper operation, data should be read from
FDOR only if the FDOBF status bit is set, indicating that FDOR contains data. The user
may use interrupt or DMA requests to trigger the DSP56300 core for data transfers.
FDOR can be read by the DSP56300 core and DMA. FDOR is also referred to as the FCOP
Data Output Buffer.
Table 12-3
FCOP Register Read/Write Handling
Data
Transfers
•
When a data source (FDOR) is read to a 24-bit destination (bus, register,
memory, etc.), the 16-bit data value occupies the 16 Most Significant Bits
(MSBs) of the 24-bit destination and the 8 Least Significant Bits (LSBs)
are zeroed.
•
When a 24-bit source (bus, register, memory, etc.) is written to a data
destination (FDIR or FCIR), the 16 MSBs of the 24-bit source will be
written to the 16-bit destination.
Non-Data
Transfers
•
When a non-data register (FCNT or FCSR) is read to a 24-bit destination
(bus, register, memory, etc.), the 16-bit value will be zero extended to a
24-bit value.
•
When a 24-bit source (bus, register, memory, etc.) is written to a
non-data register, the 8 MSBs must be written with zero for future
compatibility.
Summary of Contents for DSP56305
Page 34: ...xxxii DSP56305 User s Manual MOTOROLA ...
Page 40: ...xxxvi DSP56305 User s Manual MOTOROLA ...
Page 41: ...MOTOROLA DSP56305 User s Manual 1 1 SECTION 1 DSP56305 OVERVIEW ...
Page 58: ...1 18 DSP56305 User s Manual MOTOROLA DSP56305 Overview DSP56305 Architecture Overview ...
Page 59: ...MOTOROLA DSP56305 User s Manual 2 1 SECTION 2 SIGNAL CONNECTION DESCRIPTIONS ...
Page 98: ...2 40 DSP56305 User s Manual MOTOROLA Signal Connection Descriptions JTAG OnCE Interface ...
Page 99: ...MOTOROLA DSP56305 User s Manual 3 1 SECTION 3 MEMORY CONFIGURATION ...
Page 119: ...MOTOROLA DSP56305 User s Manual 4 1 SECTION 4 CORE CONFIGURATION ...
Page 144: ...4 26 DSP56305 User s Manual MOTOROLA Core Configuration JTAG Boundary Scan Register BSR ...
Page 145: ...MOTOROLA DSP56305 User s Manual 5 1 SECTION 5 GENERAL PURPOSE I O ...
Page 149: ...HOST INTERFACE HI32 MOTOROLA DSP56305 User s Manual 6 1 SECTION 6 HOST INTERFACE HI32 ...
Page 150: ...6 2 DSP56305 User s Manual MOTOROLA HOST INTERFACE HI32 ...
Page 259: ...MOTOROLA DSP56305 User s Manual 7 1 SECTION 7 ENHANCED SYNCHRONOUS SERIAL INTERFACE ESSI ...
Page 315: ...MOTOROLA DSP56305 User s Manual 8 1 SECTION 8 SERIAL COMMUNICATION INTERFACE SCI ...
Page 347: ...MOTOROLA DSP56305 User s Manual 9 1 SECTION 9 TIMER EVENT COUNTER ...
Page 376: ...9 30 DSP56305 User s Manual MOTOROLA Timer Event Counter Timer Modes of Operation ...
Page 377: ...MOTOROLA DSP56305 User s Manual 10 1 SECTION 10 ON CHIP EMULATION MODULE ...
Page 411: ...MOTOROLA DSP56305 User s Manual 11 1 SECTION 11 JTAG PORT ...
Page 430: ...11 20 DSP56305 User s Manual MOTOROLA JTAG Port DSP56305 Boundary Scan Register ...
Page 431: ...Filter Co Processor MOTOROLA DSP56305 User s Manual 12 1 SECTION 12 FILTER CO PROCESSOR ...
Page 471: ...VITERBI CO PROCESSOR MOTOROLA DSP56305 User s Manual 13 1 SECTION 13 VITERBI CO PROCESSOR ...
Page 522: ...13 52 DSP56305 User s Manual MOTOROLA VITERBI CO PROCESSOR References ...
Page 554: ...14 32 DSP56305 User s Manual MOTOROLA CYCLIC CODE CO PROCESSOR Configuration Examples ...
Page 555: ...MOTOROLA DSP56305 User s Manual A 1 APPENDIX A BOOTSTRAP CODE ...
Page 568: ...A 14 DSP56305 User s Manual MOTOROLA Bootstrap Code ...
Page 569: ...Equates MOTOROLA DSP56305 User s Manual B 1 APPENDIX B EQUATES ...
Page 589: ...MOTOROLA DSP56305 User s Manual C 1 APPENDIX C JTAG BSDL ...
Page 590: ...C 2 DSP56305 User s Manual MOTOROLA JTAG BSDL ...
Page 600: ...C 12 DSP56305 User s Manual MOTOROLA JTAG BSDL ...
Page 601: ...MOTOROLA DSP56305 User s Manual D 1 APPENDIX D PROGRAMMING REFERENCE ...
Page 602: ...D 2 DSP56305 User s Manual MOTOROLA PROGRAMMING REFERENCE ...
Page 661: ...Y MOTOROLA DSP56305 User s Manual Index 11 ...
Page 662: ...Y Index 12 DSP56305 User s Manual MOTOROLA ...