DSP56303 FREESCALE [Freescale Semiconductor, Inc], DSP56303 Datasheet - Page 102

• Manufacturer Part Number: DSP56303
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Host Interface (HI08)
Note:
6-2
—
—
—
—
—
Mapping:
— HI08 registers are mapped into eight consecutive locations in the host’s external bus
— The HI08 acts as a memory or I/O-mapped peripheral for microprocessors,
Transfer modes:
— Mixed 8-bit, 16-bit, and 24-bit data transfers, DSP-to-host and host-to-DSP
— Host command
Handshaking protocols:
— Software polled
— Interrupt-driven (Interrupts are compatible with most processors, including the
Data word: 8 bits
Dedicated interrupts:
— Separate request lines for each interrupt source
— Special host commands force DSP core interrupts under host processor control. These
Interface capabilities:
— Glueless interface (no external logic required) to
— Minimal glue logic (pull-ups, pull-downs) required to interface to
HRW
HDS
HCS
HREQ
HACK
The signals in the above list that are shown as asserted low (for example,
programmable polarity. The default value following reset is shown in the above list.
address space.
microcontrollers, and so forth.
MC68000, 8051, HC11, and Hitachi H8.)
commands are useful for
• Real-time production diagnostics
• Creation of a debugging window for program development
• Host control protocols
• HC11
• Hitachi H8
• 8051 family
• Thomson P6 family
• ISA bus
• Freescale 68K family
• Intel X86 family
/
/
/
HWR
HA10
HRD
/
/
HRRQ
HTRQ
read/write select (
host chip select (
data strobe (
host request (
host acknowledge (
HDS
DSP56303 User’s Manual, Rev. 2
HREQ
HCS
) or write strobe (
HRW
) or host address line (
HACK
) or read strobe (
) or host transmit request (
) or host receive request (
HWR
HRD
)
)
HA10
)
HTRQ
HRRQ
)
Freescale Semiconductor
)
HRD
) all have