CYCLIC CODE CO-PROCESSOR
Programming Considerations
MOTOROLA
DSP56305 User’s Manual
14-25
Table summarizes the operations being conducted at the input, run and output phases
in every (enabled) CFSR during a Cipher processing session.
14.6.4.1
Cipher Mode Initialization
Assuming the CCOP is in the CCOP individual reset state, a Cipher processing session is
initialized by the following steps. There is no required order to these steps except that
data should be written to the CFSRs and CDFR while CCOP is enabled (CEN in CCSR is
set), and the counter and configuration registers (CCNT, CSFS, CSFTA, and CSFTB)
should be written when the processing is disabled (PREN in CCSR is cleared).
1. Enable CCOP in Cipher mode (in CCSR: set CEN, clear PREN, clear OPM1, and
program OPM0 and LRC as required).
2. Initialize CFSRs value as required (CFSRA, CFSRB, CFSRC, and CFSRD).
3. Configure CFSRz parameter registers as required by the Cipher algorithm
(CFBTz, CFFTz, CBSRz, and CMSKz).
4. Initialize the counter register (CCNT), step function select register (CSFS) and
step function table and input/output enable registers (CSFTA and CSFTB).
5. Write the input data block into the Data FIFO Register (CDFR).
6. Enable processing (set PREN in CCSR).
14.6.4.2
Cipher Mode Output
After Cipher processing is completed (i.e., CIDN is set), the DSP56300 core should read
the output data sequence from the Data FIFO Register (CDFR). CIDN is cleared after all
expected data words were read from CDFR.
Table 14-7
Operations During Cipher Mode Processing
Input Phase
Run Phase
Output Phase
Input Data
Enabled if INEx
in CSFTB set
Disabled
Disabled
Shifts
Enabled
Enabled according to
Step Function Table
Enabled according to
Step Function Table
Output Data
Disabled
Disabled
Enabled if OUTEx
in CSFTB set
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 ...