Motorola DSP56301 - Manual (Page 74)

Memory Maps
3 -14 DSP56301 User’s Manual
Figure 3-8. 16-Bit Space, Switched Program RAM, Instruction Cache Enabled (1, 1, 1)
Program
$FFFF
$0000
Internal
External
X Data
$FFFF
$0000
$0C00
External
Internal X Data
RAM (3K)
Internal I/O
Y Data
$0400
$FF80
$FFFF
$0000
External
Internal Y Data
RAM (3K)
External I/O
$FF80
(128 words) (128 words)
Bit Settings Memory Configuration
CE MS SC Program RAM X Data RAM Y Data RAM Cache
Addressable
Memory Size
1 1 1 1 K
$000–$3FF
3 K
$000–$BFF
3 K
$000–$BFF
1 K
not addressable
64 K
Program RAM (1K)
$0C00
NOTE: External program memory begins immediately after the internal program memory. The
internal memory modules that are mapped to the addresses $0400–$0800 are used as
Instruction Cache space when the Instruction Cache is enabled, and these addresses become
part of the external P memory space.