6-8
DSP56309UM/D MOTOROLA
Host Interface (HI08)
HI08 DSP Side ProgrammerÕs Model
6.5
HI08 DSP SIDE PROGRAMMERÕS MODEL
The DSP56309 core treats the HI08 as a memory-mapped peripheral occupying eight
24-bit words in X data memory space. The DSP treats the HI08 as a normal
memory-mapped peripheral, employing either standard polled or interrupt-driven
programming techniques. Separate transmit and receive data registers are
double-buffered to allow the DSP and host processor to transfer data efficiently at high
speed. Direct memory mapping allows the DSP56309 core to communicate with the HI08
registers using standard instructions and addressing modes. In addition, the MOVEP
instruction allows direct data transfers between DSP56309 internal memory and the
HI08 registers or
vice versa
.
There are two kinds of host processor registers, data and control, with eight registers in
all. All eight registers can be accessed by the DSP core but not by the external host.
Data registers are 24-bit registers used for high-speed data transfer to and from the DSP.
¥ Host data receive register (HRX)
¥ Host data transmit register (HTX)
The DSP side control registers are 16-bit registers that control DSP functions. The eight
MSBs in the DSP side control registers are read by the DSP56309 as 0. Those registers are
as follows:
¥ Host control register (HCR)
¥ Host status register (HSR)
¥ Host base address register (HBAR)
¥ Host port control register (HPCR)
¥ Host GPIO data direction register (HDDR)
¥ Host GPIO data register (HDR)
Both hardware RESET signals and software RESET instructions disable the HI08. After
reset, the HI08 signals are configured to GPIO and disconnected from the DSP56309 core
(i.e., the signals are left floating).
6.5.1
Host Receive Data Register (HRX)
The HRX register handles host-to-DSP data transfers. The DSP56309 views it as a 24-bit
read-only register. Its address is X:$FFFFC6. It is loaded with 24-bit data from the
Содержание DSP56309
Страница 25: ...xxii DSP56309UM D MOTOROLA Figure D 25 Port E Registers PCRE PRRE PDRE D 39 ...
Страница 30: ...MOTOROLA DSP56309UM D 1 1 SECTION 1 DSP56309 OVERVIEW ...
Страница 47: ...1 18 DSP56309UM D MOTOROLA DSP56309 Overview DSP56309 Architecture Overview ...
Страница 48: ...MOTOROLA DSP56309UM D 2 1 SECTION 2 SIGNAL CONNECTION DESCRIPTIONS ...
Страница 85: ...2 38 DSP56309UM D MOTOROLA Signal Connection Descriptions OnCE JTAG Interface ...
Страница 86: ...MOTOROLA DSP56309UM D 3 1 SECTION 3 MEMORY CONFIGURATION ...
Страница 104: ...MOTOROLA DSP56309UM D 4 1 SECTION 4 CORE CONFIGURATION ...
Страница 124: ...MOTOROLA DSP56309UM D 5 1 SECTION 5 GENERAL PURPOSE I O ...
Страница 125: ...5 2 DSP56309UM D MOTOROLA General Purpose I O 5 1 INTRODUCTION 5 3 5 2 PROGRAMMING MODEL 5 3 ...
Страница 128: ...MOTOROLA DSP56309UM D 6 1 SECTION 6 HOST INTERFACE HI08 ...
Страница 166: ...MOTOROLA DSP56309UM D 7 1 SECTION 7 ENHANCED SYNCHRONOUS SERIAL INTERFACE ESSI ...
Страница 212: ...MOTOROLA DSP56309UM D 8 1 SECTION 8 SERIAL COMMUNICATION INTERFACE SCI ...
Страница 241: ...8 30 DSP56309UM D MOTOROLA Serial Communication Interface SCI GPIO Signals and Registers ...
Страница 242: ...MOTOROLA DSP56309UM D 9 1 SECTION 9 TRIPLE TIMER MODULE ...
Страница 269: ...9 28 DSP56309UM D MOTOROLA Triple Timer Module Timer Operational Modes ...
Страница 270: ...MOTOROLA DSP56309UM D 10 1 SECTION 10 ON CHIP EMULATION MODULE ...
Страница 302: ...MOTOROLA DSP56309UM D 11 1 SECTION 11 JTAG PORT ...
Страница 369: ...C 22 DSP56309UM D MOTOROLA DSP56309 BSDL Listing ...
Страница 370: ...MOTOROLA DSP56309UM D D 1 APPENDIX D PROGRAMMING REFERENCE ...
Страница 405: ......
Страница 409: ......