HOST INTERFACE (HI32)
HOST SIDE Programming Model
MOTOROLA
DSP56305 User’s Manual
6-55
In PCI mode (HM = $1) memory space transactions, the HCTR is accessed if the PCI
address is HI32_base_address: $010.
The HCTR is written in accordance with the byte enables (HC3/HBE3-HC0/HBE0
signals). Byte lanes that are not enabled are not written and the corresponding bits
remain unchanged.
The HCTR bits affect the HI32 logic upon the completion of the transaction in they were
written.
When in a Universal Bus mode (HM
=
$2 or $3), the HCTR is accessed if the HA10-HA3
value matches the HI32 base address (CBMA, see Section 6.6.11) and the HA2-HA0
value is $4.
The control bits are described in the following paragraphs.
6.6.1.1
Transmit Request Enable (TREQ) Bit 1
The TREQ bit is used to control the
HIRQ
and HDRQ signals for host transmit data
transfers (see Table 6-13), when in a Universal Bus mode (HM
=
$2 or $3).
If DMA enable bit (DMAE) is cleared, TREQ enables the host interrupt request
HIRQ
signal when the host transmit data request (HTRQ) status bit in the HI32 status register
(HSTR) is set. If TREQ is cleared, HTRQ host interrupt requests are disabled. If TREQ is
set, the host interrupt request
HIRQ
signal will be asserted if HTRQ is set. HDRQ is
deasserted.
If DMAE is set, TREQ enables the host DMA request (HDRQ) signal when the host
transmit data request (HTRQ) status bit in the HSTR is set. If TREQ is cleared, HTRQ
external DMA requests are disabled. If TREQ is set, the host DMA request HDRQ signal
will be asserted if HTRQ is set.
HIRQ
is deasserted (high impedance if HIRD = 0 in the
DCTR).
The personal hardware reset clears TREQ.
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 ...