Motorola DSP56301 - Manual (Page 76)

Operating Modes
4 -2 DSP56301 User’s Manual
4.1 Operating Modes
The operating modes govern not only how the DSP56301 operates but also the start-up
procedure location when the DSP56301 leaves the reset state. The
MODA – MODD pins are
sampled as the DSP56301 exits the reset state. Table 4-1 depicts the mode assignments and
Table 4-2 defines the modes.
Table 4-1. DSP56301 Operating Modes
Mode MOD
D
MOD
C
MOD
B
MOD
A
Reset
Vector
Description
0 0 0 0 0 $C00000 Expanded mode
1 0 0 0 1 $FF0000 Bootstrap from byte-wide memory
2 0 0 1 0 $FF0000 Bootstrap through SCI
3 0 0 1 1 $FF0000 Host bootstrap in DSP-to-DSP mode
4 0 1 0 0 $FF0000 Bootstrap from serial EEPROM through SCI
5 0 1 0 1 $FF0000 Host bootstrap 16-bit wide UB mode supporting
ISA (slave) glueless connection
6 0 1 1 0 $FF0000 Host bootstrap 8-bit wide UB mode in
double-strobe pin configuration
7 0 1 1 1 $FF0000 Host bootstrap 8-bit wide UB mode in
single-strobe pin configuration
8 1 0 0 0 $008000 Expanded mode
9 1 0 0 1 $FF0000 Bootstrap from byte-wide memory
A 1 0 1 0 $FF0000 Bootstrap through SCI
B 1 0 1 1 $FF0000 Host bootstrap in DSP-to-DSP mode
C 1 1 0 0 $FF0000 Host bootstrap PCI target (slave) mode
D 1 1 0 1 $FF0000 Host bootstrap 16-bit wide UB mode supporting
ISA (slave) glueless connection
E 1 1 1 0 $FF0000 Host bootstrap 8-bit wide UB mode in
double-strobe pin configuration
F 1 1 1 1 $FF0000 Host bootstrap 8-bit wide UB mode in
single-strobe pin configuration