Motorola DSP56301 - Manual (Page 72)

Memory Maps
3 -12 DSP56301 User’s Manual
Figure 3-6. 16-Bit Space With Instruction Cache Enabled (1, 0, 1)
Program
$FFFF
$0000
Internal
External
X Data
$FFFF
$0000
$0800
External
Internal X Data
RAM (2K)
Internal I/O
Y Data
$0C00
$FF80
$FFFF
$0000
External
Internal Y Data
RAM (2K)
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 0 1 3K
$000–$BFF
2K
$000–$7FF
2K
$000–$7FF
1K
not addressable
64K
Program RAM
(2K)
$0800
NOTE: External program memory begins immediately after the internal program memory. The
internal memory modules that are mapped to the addresses $0C00–$1000 are used as
Instruction Cache space when the Instruction Cache is enabled, and these addresses become
part of the external P memory space.