DR80390CPU
High Performance
8-bit Microcontroller
ver 3.10
O V E R V I E W
C P U F E A T U R E S
DR80390CPU is a high performance,
area optimized soft core of a single-chip 8-bit
embedded controller dedicated for operation
with fast (typically on-chip) and slow (off-chip)
memories. The core has been designed with a
special concern about low power consump-
tion. Additionally an advanced power man-
agement unit makes DR80390CPU core per-
fect for portable equipment where low power
consumption is mandatory.
● 100% software compatible with industry
standard 80390 & 8051
○ LARGE mode – 8051 instruction set
○ FLAT mode – 80390 instruction set
● RISC architecture enables to execute in-
structions 6.7 times faster compared to
standard 8051
● 12 times faster multiplication
● 9.6 times faster division
DR80390CPU soft core is 100% binary-
compatible with the industry standard 80C390
& 8051 8-bit microcontroller. There are two
configurations of DR80390CPU: Harward
where external data and program buses are
separated, and von Neumann with common
program and external data bus. DR80390CPU
has RISC architecture 6.7 times faster com-
pared to standard architecture and executes
65-200 million instructions per second. This
performance can also be exploited to great
advantage in low power applications where
the core can be clocked up to seven times
more slowly than the original implementation
for no performance penalty.
● Up to 256 bytes of internal (on-chip) Data
Memory
● Up to 16M bytes of contiguous Program
Memory
● Up to 16M bytes of external (off-chip) Data
Memory
● User programmable Program Memory Wait
States solution for wide range of memories
speed
● User programmable External Data Memory
Wait States solution for wide range of
memories speed
DR80390CPU is delivered with fully
automated testbench and complete set of
tests allowing easy package validation at each
stage of SoC design flow.
● De-multiplexed Address/Data bus to allow
easy connection to memory
● Interface for additional Special Function
Registers
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