6-10
DSP56309UM/D MOTOROLA
Host Interface (HI08)
HI08 DSP Side ProgrammerÕs Model
6.5.3.1
HCR Host Receive Interrupt Enable (HRIE) Bit 0
The HRIE bit generates a host receive data interrupt request if the host receive data full
(HRDF) bit in the host status register (HSR, Bit 0), is set. The HRDF bit is set when data is
written to the HRX. If HRIE is cleared, HRDF interrupts are disabled.
6.5.3.2
HCR Host Transmit Interrupt Enable (HTIE) Bit 1
The HTIE bit generates a host transmit data interrupt request if the host transmit data
empty (HTDE) bit in the HSR is set. The HTDE bit is set when data is read from the HTX.
If HTIE is cleared, HTDE interrupts are disabled.
6.5.3.3
HCR Host Command Interrupt Enable (HCIE) Bit 2
The HCIE bit generates a host command interrupt request if the host command pending
(HCP) status bit in the HSR is set. If HCIE is cleared, HCP interrupts are disabled. The
interrupt address is determined by the host command vector register (CVR).
Note:
If more than one interrupt request source is asserted and enabled (e.g., HRDF
is set, HCP is set, HRIE is set, and HCIE is set), the HI08 generates interrupt
requests according to priorities shown in
6.5.3.4
HCR Host Flags 2,3 (HF[3:2]) Bits 3, 4
HF[3:2] bits are general-purpose flags for DSP-to-host communication. The DSP core sets
and clears them. The values of HF[3:2] are reflected in the interface status register (ISR);
that is, if they are modified by the DSP software, the host processor can read the
modified values by reading the ISR.
These two flags can be used individually or as encoded pairs in a simple DSP-to-host
communication protocol, implemented in both the DSP and the host processor software.
6.5.3.5
HCR Reserved Bits 5-15
These bits are reserved. They are read as 0 and should be written with 0.
Table 6-4
Host Command Interrupt Priority List
Priority
Interrupt Source
Highest
Host Command (HCP = 1)
Transmit Data (HTDE = 1)
Lowest
Receive Data (HRDF = 1)
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 ...
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