DR80390
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
DR80390 is a high performance, area
optimized soft core of a single-chip 8-bit em-
bedded 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 DR80390 core perfect
for portable equipment where low power
consumption is mandatory.
● 100% software compatible with industry
standard 80390
○ 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
DR80390 soft core is 100% binary-
compatible with the industry standard 80C390
8-bit microcontroller. There are two configura-
tions of DR80390: Harward where external
data and program buses are separated, and
von Neumann with common program and ex-
ternal data bus. DR80390 has RISC architec-
ture 6.7 times faster compared to standard
architecture and executes 65-200 million in-
structions 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
DR80390 is delivered with fully auto-
mated 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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