Freescale Semiconductor DSP56366 - Manual (Page 97)

HDI08 Host Port Signals
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
Freescale Semiconductor 6-3
— Cycle-stealing DMA with initialization
• Dedicated Interrupts:
— Separate interrupt lines for each interrupt source
— Special host commands force DSP core interrupts under host processor control, which are
useful for the following:
– Real-Time Production Diagnostics
– Debugging Window for Program Development
– Host Control Protocols
• Interface Capabilities:
— Glueless interface (no external logic required) to the following:
– Freescale HC11
– Hitachi H8
– 8051 family
– Thomson P6 family
– external DMA controllers
— Minimal glue-logic (pullups, pulldowns) required to interface to the following:
– ISA bus
– Motorola 68K family
– Intel X86 family.
6.3 HDI08 Host Port Signals
The host port signals are described in Section 2, "Signal/Connection Descriptions" . If the Host Interface
functionality is not required, the 16 pins may be defined as general purpose I/O pins PB0-PB15. When the
HDI08 is in use, only five host port signals (HA8, HA9, HCS, HOREQ and HACK) may be individually
programmed as GPIO pins if they are not needed for their HDI08 function. Summary of the HDI08 signals.
Table 6-1 HDI08 Signal Summary
HDI08 Port Pin Multiplexed address/data bus Mode Non Multiplexed bus Mode GPIO Mode
HAD0-HAD7 HAD0-HAD7 H0-H7 PB0-PB7
HAS/HA0 HAS/HAS HA0 PB8
HA8/HA1 HA8 HA1 PB9
HA9/HA2 HA9 HA2 PB10
HCS/HA10 HA10 HCS/HCS PB13