Motorola DSP56309 User Manual page 111

Core Configuration
Bootstrap Program
4.3.7 Modes C, D, E, F: Boot from HI08
Modes C, D, E, and F enable the programmer to boot through the host interface (HI08) in
various ways.
4.3.7.1 Mode C: In ISA/DSP5630X Mode (8-Bit Bus)
Mode MODD
C 1
In mode C: boot from HI08 in ISA/DSP5630x with an 8-bit wide bus, the HI08 is
configured to interface with an ISA bus or with the memory expansion port of a master
DSP5630n processor.
If the host processor sets host flag 0 (HF0) in the HI08 interface control register (HCR)
while writing the initialization program, the bootstrap program stops loading
instructions, jumps to the starting address specified, and executes the loaded program.
4.3.7.2 Mode D: In HC11 Non-multiplexed Mode
Mode MODD
D 1
In mode D: boot from HI08 in HC11 non-multiplexed mode, the bootstrap program sets
the host interface to interface with the Motorola HC11 microcontroller.
If the host processor sets host flag 0 (HF0) in the HCR while writing the initialization
program, the bootstrap program stops loading instructions, jumps to the starting
address specified, and executes the loaded program.
4-8
MODC MODB
1 0
MODC MODB
1 0
DSP56309UM/D
Reset
MODA
Vector
0 $FF0000
Reset
MODA
Vector
1 $FF0000
Description
HI08 Bootstrap in
ISA/DSP5630X
Description
HI08 Bootstrap in HC11
non-multiplexed
MOTOROLA