1 operating modes, Operating modes -2, Dsp56301 operating modes -2 – Motorola DSP56301 User Manual
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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