COREMP7 Datasheet, PDF (13/30 Pages) Actel Corporation – CoreMP7

CoreMP7
CoreMP7 Variants
There are two implementations of CoreMP7 (Core Only and Core Plus Debug). The utilization and performance of the
variants are shown in Table 1 on page 2.
Debug Interface
ARM7TDMI-S Core
Debug
EmbeddedICE-RT
(Debug)
Debug JTAG
Signals
TAP
Controller
Bus Control
Signals
Address
Data
ARM7 CPU
Coprocessor
Signals
Figure 8 • ARM7 TDMI-S Core
Core Plus Debug
The Core Plus Debug variant is configured with all
features of the ARM7TDMI-S. The variant incorporates
the full debug functionality of the ARM7TDMI-S and is
fully compliant with RealView RVDS, RVDK, and other
ARM software debug tools.
Core Only
The Core Only variant has the same features as the Core
Plus Debug variant except that it does not include the
ICE-RT debug block or the TAP controller, which reduces
the size of the core. This means that the standard debug
tools cannot be used with this variant of CoreMP7.
No Debug
This is the most obvious characteristic of the Core Only
variant. To reduce area, the Debug EmbeddedICE-RT
macrocell, the EmbeddedICE-RT TAP controller, and the
scan logic have been optimized out. This means that
standard software debug tools cannot be used when this
variant of the CoreMP7 is instantiated. Users can employ
the Core Plus Debug variant for development, and when
the application has been fully tested and debugged, the
Core Only variant can be instantiated to reduce area in
the final shipping product.
No Coprocessor Interface
The coprocessor interface is a rarely used feature in
ARM7 family microprocessors and has been removed
from CoreMP7 to minimize area.
Little Endian Only
Most microprocessor-based systems use Little Endian
byte ordering. The option of selecting Big Endian has
been removed from CoreMP7 to minimize area.
On-Chip RAM Consumed by Register Block
To minimize the area, the CoreMP7 variants map the
processor register block into on-chip RAM. RAM blocks
used to implement CoreMP7 registers are no longer
available for use in user designs.
v2.6
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