2015
DP8051CPU IP Core
Pipelined High Performance 8-bit Microcontroller v. 5.02
COMPANY OVERVIEW
Digital Core Design is a leading IP Core provider and a System-on-Chip design house.
The company was founded in 1999 and since
the very beginning has been focused on IP
Core architecture improvements. Our innovative, silicon proven solutions have been employed by over 300 customers and with more
than 500 hundred licenses sold to companies
like Intel, Siemens, Philips, General Electric,
Sony and Toyota. Based on more than 70 different architectures, starting from serial interfaces to advanced microcontrollers and SoCs,
we’re designing solutions tailored to your
needs.
IP CORE OVERVIEW
The DP8051CPU is an ultra-high performance,
speed optimized soft core of a single-chip 8bit embedded controller, dedicated to operate
with fast (typically on-chip) and slow (off-chip)
memories. The core has been designed with a
special concern about performance to power
consumption ratio. This ratio is extended by
an advanced power management unit - the
PMU. The DP8051CPU soft core is 100% binary-compatible with the industry standard 8051
8-bit microcontroller. There are two configurations of the DP8051CPU: Harvard, where an
internal data and program buses are separated and von Neumann, with a common program and an external data bus. The
DP8051CPU has Pipelined RISC architecture
and executes 120-300 million instructions
per second. Dhrystone 2.1 benchmark program runs from 11.46 to 15.55 times faster
than the original 80C51 at the same frequency. This performance can also be exploited to
a great advantage in low power applications,
where the core can be clocked over ten times
slower than the original implementation, with
no performance penalty. The DP8051CPU is
delivered with fully automated test bench
and complete set of tests, allowing easy
package validation at each stage of SoC design
flow.
CPU FEATURES
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100% software compatible with the 8051 industry standard
Pipelined RISC architecture enables to run
15.55 times faster than the original 80C51
at the same frequency
Up to 14.632 VAX MIPS at 100 MHz
24 times faster multiplication
12 times faster addition
Up to 256 bytes of internal (on-chip) Data
Memory
Up to 64K bytes of internal (on-chip) or external (off-chip) 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
De-multiplexed Address/Data bus to allow
easy connection to memory
Dedicated signal for Program Memory writes.
Interface for additional Special Function Registers
Fully synthesizable, static synchronous design
with positive edge clocking and no internal tristates
Scan test ready
DELIVERABLES
♦
Source code:
● VHDL Source Code or/and
● VERILOG Source Code or/and
● Encrypted, or plain text EDIF
♦
VHDL & VERILOG test bench environment
● Active-HDL automatic simulation macros
● ModelSim automatic simulation macros
● Tests with reference responses
♦
Technical documentation
● Installation notes
● HDL core specification
● Datasheet
♦
♦
♦
Synthesis scripts
Example application
Technical support
● IP Core implementation support
● 3 months maintenance
●
●
Delivery of the IP Core and documentation updates,
minor and major versions changes
Phone & email support
1
Copyright © 1999-2015 DCD – Digital Core Design. All Rights Reserved.
All trademarks mentioned in this document are the property
of their respective owners.
♦
PERIPHERALS
●
DoCD™ debug unit
○ Processor execution control
○
○
○
Run, Halt
Step into instruction
Skip instruction
○
○
○
○
○
Program Counter (PC)
Program Memory
Internal (direct) Data Memory
Special Function Registers (SFRs)
External Data Memory
○ Code execution breakpoints
○
○
up to eight real-time PC breakpoints
unlimited number of real-time OPCODE breakpoints
○ Hardware execution watch-points at
○
○
○
Internal (direct) Data Memory
Special Function Registers (SFRs)
External Data Memory
○ Hardware watch-points activated at certain:
○
○
○
○
address by any write into memory
address by any read from memory
address by required data write into memory
address by required data read from memory
○ Instructions Smart Trace Buffer – configurable up
to 8192 levels (optional)
○ Automatic adjustment of debug data transfer
speed rate between HAD and Silicon
○ TTAG or JTAG Communication interface
●
Power Management Unit
○ Power management mode
○ Switchback feature
○ Stop mode
●
Interrupt Controller
○ 2 priority levels
○ 2 external interrupt sources
DESIGN FEATURES
♦
PROGRAM MEMORY:
The DP8051CPU soft core is dedicated
for operation with Internal and External Program
Memory. Internal Program Memory can be implemented as:
○ ROM located in address range between 0x0000
(ROMsize-1)
○ RAM located in address range between (RAMsize-1)
0xFFFF
External Program Memory can be implemented as
ROM or RAM located in address range between
ROMsize RAMsize.
♦
The DP8051CPU soft core can address up to 16 MB
of External Data Memory. Extra DPX (Data Pointer
eXtended) register is used for segments swapping.
♦
○ Read-write all processor contents
INTERNAL DATA MEMORY:
EXTERNAL DATA MEMORY:
USER SPECIAL FUNCTION REGISTERS:
Up to 104 External (user) Special Function Registers (ESFRs) may be added to the DP8051CPU design. ESFRs, are memory mapped into Direct
Memory, between addresses 0x80 and 0xFF, in the
same manner, as core SFRs and may occupy any
address, that is not occupied by a core SFR.
♦
WAIT STATES SUPPORT:
The DP8051CPU soft core is designed to be used
with wide range of Program and Data memories.
Slow Program and External Data memory, may
assert a memory Wait signal, to hold up CPU activity.
CONFIGURATION
The following parameters of the DP8051CPU
core can be easily adjusted to requirements of
a dedicated application and technology. The
configuration of the core can be effortlessly
done, by changing appropriate constants in
the package file. There is no need to change
any parts of the code.
● Internal Program Memory type
- synchronous
- asynchronous
● Internal Program ROM Memory size
-
● Internal Program RAM Memory size
-
● Internal Program Memory fixed size
- true
- false
● Interrupts
-
● Power Management Mode
- used
- unused
● Stop mode
- used
- unused
● DoCD debug unit
- used
- unused
-
0 - 64kB
0 - 64kB
subroutines
location
Besides parameters mentioned above, all
available peripherals and external interrupts
can be excluded from the core, by changing
appropriate constants in the package file.
The DP8051CPU can address Internal Data Memory
of up to 256 bytes. The Internal Data Memory can
be implemented as Single-Port synchronous RAM.
2
Copyright © 1999-2015 DCD – Digital Core Design. All Rights Reserved.
All trademarks mentioned in this document are the property
of their respective owners.
LICENSING
Comprehensible and clearly defined licensing
methods without royalty-per-chip fees make
use of our IP Cores easy and simple.
Single-Site license option – dedicated to small
and middle sized companies, which run their
business in one place.
Multi-Site license option – dedicated to corporate customers, who operate at several locations. The licensed product can be used in
selected company branches.
In all cases the number of IP Core instantiations within a project and the number of
manufactured chips are unlimited. The license
is royalty-per-chip free. There are no restrictions regarding the time of use.
There are two formats of the delivered IP
Core:
VHDL or Verilog RTL synthesizable source code
called HDL Source code
FPGA EDIF/NGO/NGD/QXP/VQM called Netlist
PINS DESCRIPTION
PIN
clk
reset
port0i
port1i
port2i
port3i
iprgramsize
iprgromsize
prgramdata
prgromdata
TYPE
input
input
input
input
input
input
input
input
input
input
sxdmdatai
input
xdatai
ready
ramdatai
sfrdatai
int0
int1
tdi
tck
tms
rsto
port0o
port1o
port2o
port3o
prgaddr
prgdatao
prgramwr
sxdmaddr
input
input
input
input
input
input
input
input
input
output
output
output
output
output
output
output
output
output
DESCRIPTION
Global clock
Global reset
Port 0 input
Port 1 input
Port 2 input
Port 3 input
Size of on-chip RAM CODE
Size of on-chip ROM CODE
Data bus from int. RAM prog. memory
Data bus from int. ROM prog. memory
Data bus from sync external data
memory (SXDM)
Data bus from external memories
External memory data ready
Data bus from internal data memory
Data bus from user SFR’s
External interrupt 0
External interrupt 1
DoCD™ TAP data input
DoCD™ TAP clock input
DoCD™ TAP mode select input
Reset output
Port 0 output
Port 1 output
Port 2 output
Port 3 output
Internal program memory address bus
Data bus for internal program memory
Internal program memory write
Sync XDATA memory address bus (SXDM)
sxdmdatao
sxdmoe
sxdmwe
xaddr
xdatao
xdataz
xprgrd
xprgwr
xdatard
xdatawr
ramaddr
ramdatao
ramoe
ramwe
sfraddr
sfrdatao
sfroe
sfrwe
tdo
rtck
debugacs
coderun
pmm
stop
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
Data bus for Sync XDATA memory (SXDM)
Sync XDATA memory read (SXDM)
Sync XDATA memory write (SXDM)
Address bus for external memories
Data bus for external memories
Turn xdata bus into ‘Z’ state
External program memory read
External program memory write
External data memory read
External data memory write
Internal Data Memory address bus
Data bus for internal data memory
Internal data memory output enable
Internal data memory write enable
Address bus for user SFR’s
Data bus for user SFR’s
User SFR’s read enable
User SFR’s write enable
DoCD™ TAP data output
DoCD™ return clock line
DoCD™ accessing data
CPU is executing an instruction
Power management mode indicator
Stop mode indicator
UNITS SUMMARY
ALU – Arithmetic Logic Unit - performs the
arithmetic and logic operations, during execution of an instruction. It contains accumulator
(ACC), Program Status Word (PSW), (B) registers and related logic, like arithmetic unit,
logic unit, multiplier and divider.
Opcode Decoder – Performs an opcode decoding instruction and control functions for all
other blocks.
Control Unit – It performs the core synchronization and data flow control. This module is
directly connected to Opcode Decoder and it
manages execution of all microcontroller
tasks.
Program Memory Interface – Program
Memory Interface contains Program Counter
(PC) and related logic. It performs the instructions code fetching. Program Memory can be
also written. This feature allows usage of a
small boot loader, to load new program into
ROM, RAM, EPROM or FLASH EEPROM storage
via UART, SPI, I2C or DoCD™ module.
External Memory Interface - Contains
memory access related registers, such as Data
Page High (DPH), Data Page Low (DPL) and
Data Page Pointer (DPP) registers. It performs
the external Program and Data Memory addressing and data transfers. Program fetch
cycle length can be programmed by the user.
3
Copyright © 1999-2015 DCD – Digital Core Design. All Rights Reserved.
All trademarks mentioned in this document are the property
of their respective owners.
This feature is called Program Memory Wait
States and it allows core, to work with different speed program memories.
Synchronous eXternal Data Memory (SXDM)
Interface – contains XDATA memory access
related logic, allowing fast access to synchronous memory devices. It performs the external Data Memory addressing and data transfers. This memory can be used, to store large
variables frequently accessed by CPU, improving overall performance of application.
Internal Data Memory Interface – Interface
controls access into the internal memory of
size up to 256 bytes. It contains 8-bit Stack
Pointer (SP) register and related logic.
User SFRs Interface – Special Function Registers interface controls access to the special
registers. It contains standard and used defined registers and related logic. User defined
external devices can be quickly accessed
(read, written, modified), by using all direct
addressing mode instructions.
Interrupt Controller – Interrupt Controller
module is responsible for the interrupt manage system of the external and internal interrupt sources. It contains interrupt related registers, such as Interrupt Enable (IE), Interrupt
Priority (IP) and (TCON) registers.
Power Management Unit – Power Management Unit contains advanced power saving
mechanisms with switchback feature, allowing
external clock control logic to stop clocking
(Stop mode) or run core in lower clock frequency (Power Management Mode), to significantly reduce power consumption. Switchback feature allows UARTs and interrupts to
be processed in full speed mode, if enabled. It
is highly desirable, when microcontroller is
planned to be used in portable and power
critical applications.
DoCD™ Debug Unit – it’s a a real-time hardware debugger, which provides debugging
capability of a whole SoC system. Unlike other
on-chip debuggers, DoCDTM ensures nonintrusive debugging of running application. It
can halt, run, step into or skip an instruction,
read/write any contents of microcontroller,
including all registers, internal and external
program memories and all SFRs, including user
defined peripherals. Hardware breakpoints
can be set and controlled on program
memory, internal and external data memories,
as well as on SFRs. Hardware watchpoints can
be set and controlled on internal and external
data memories and also on SFRs. Hardware
watchpoints are executed, if any write/read
occurs at particular address, with certain data
pattern or without pattern. Two additional
pins: CODERUN and DEBUGACS, indicate the
state of the debugger and CPU. CODERUN is
active, when CPU is executing an instruction.
DEBUGACS pin is active, when any access is
performed by DoCDTM debugger. The DoCDTM
system includes TTAG or JTAG interface
and complete set of tools, to communicate
and work with core in real time debugging. It
is built, as a scalable unit and some features
can be turned off by the user, to save silicon
and reduce power consumption. When debugger is not used, it is automatically switched
to power save mode. Finally, when debug
option is no longer used, whole debugger is
turned off.
PROGRAM CODE SPACE
IMPLEMENTATION
The following figure shows an example Program Memory space implementation in systems with the DP8051CPU Microcontroller
core. The on-chip Program Memory located in
an address space between 0kB and 1kB, is
typically used for BOOT code with system initialization functions. This part of the code is
typically implemented as ROM. The on-chip
Program Memory located in an address space
between 60kB and 64kB, is typically used
for timing critical part of the code e.g. interrupt subroutines, arithmetic functions etc.
This part of the code is typically implemented
as RAM and can be loaded by the BOOT code,
during initialization phase from an off-chip
memory or through a RS232 interface from an
external device. The program code is executed
from the two spaces mentioned above without wait-states and can achieve top performance of up to 200 million instructions per
second (many instructions executed in one
clock cycle). The off-chip Program Memory
located in an address space between 1kB and
60kB, is typically used for the main code and
constants. This part of the code is usually im-
4
Copyright © 1999-2015 DCD – Digital Core Design. All Rights Reserved.
All trademarks mentioned in this document are the property
of their respective owners.
plemented as ROM, SRAM or a FLASH device.
Due to relatively long access time, the program code executed from devices mentioned
above must be fetched with additional WaitStates. The number of required Wait-States
depends on a memory access time and a
DP8051CPU clock frequency. In most cases,
the proper number of Wait-States cycles is
between 2 and 5. The READY pin can be also
dynamically modulated e.g. by SDRAM controller.
0xFFFF
0xF000
The implementation described above should
be treated as an example only. All Program
Memory spaces are fully configurable. For
timing-critical applications the whole program
code can be implemented as on-chip ROM and
(or) RAM and executed without Wait-States,
but for some other applications, the whole
program code can be implemented as off-chip
ROM or FLASH and executed with required
number Wait-State cycles.
SYMBOL
On chip Memory
(implemented as RAM)
ramdatai
sfrdatai
prgramdatai
prgromdatai
Off chip Memory
(implemented as ROM, SRAM
or FLASH)
xdatai
ready
sxdmdatai
0x0400
0x0000
On-chip Memory
(implemented as ROM)
int0
int1
The figure below shows typical Program
Memories connections in system with
DP8051CPU Microcontroller core.
prgramdatai
prgdatao
prgramwr
12
10
DP8051CPU
xdatai
8
sfraddr
sfrdatao
sfroe
sfrwe
stop
pmm
ASIC or FPGA chip
8
Off-chip Memory
16
(implemented as FLASH,
or SRAM)
e.g. 2-5 Wait-State access
xprgrd
iprgromsize
iprgramsize
coderun
debugacs
rsto
reset
clk
xprgwr
ready
On-chip Memory
(implemented as ROM)
0 Wait-State access
xdatao
xaddr
sxdmaddr
sxdmdatao
sxdmwe
sxdmoe
On-chip Memory
(implemented as RAM)
0 Wait-State access
prgaddr
prgromdatai
xaddr
xdatao
xdataz
xdatard
xdatawr
xprgrd
xprgwr
ramaddr
ramdatao
ramwe
ramoe
8
8
prgaddr
prgdatao
prgramwr
Wait-State
Manager
5
Copyright © 1999-2015 DCD – Digital Core Design. All Rights Reserved.
All trademarks mentioned in this document are the property
of their respective owners.
DP8051 FAMILY OVERVIEW
256
-
-
-
-
-
-
-
-
-
-
256 16M
5
2
1
2
1
4
-
-
-
-
-
-
-
256 16M
15
2
2
3
2
4
2
1
2
Master I C Bus Controller
2
Power Management Unit
2
External Data / Program
Memory Wait States
Floating Point Coprocessor
256
64k
Fixed Point Coprocessor
64k
64k
SPI
64k
64k
Slave I C Bus Controller
64k
15.6
Watchdog
15.6
DP8051XP
Compare/Capture
DP8051
I\O Ports
256 16M
UART
256
Timer/Counters
64k
Data Pointers
Internal Data Memory space
64k
Interrupt levels
Stack space size
64k
Interrupt sources
off-chip
15.6
Program
Memory space
Interface for additional SFRs
on-chip ROM
DP8051CPU
Design
Architecture speed grade
on-chip RAM
External Data Memory space
The main features of each DP8051 family member have been summarized in the table below. It gives
a brief member characteristic, helping you to select the most suitable IP Core for your application.
You can specify your own peripheral set (including listed below and others) and requests the core
modifications.
DP8051 family of Pipelined High Performance Microcontroller Cores
DP80390 FAMILY OVERVIEW
Interrupt levels
Data Pointers
Timer/Counters
UART
I\O Ports
Compare/Capture
Watchdog
Slave I C Bus Controller
SPI
Fixed Point Coprocessor
Floating Point Coprocessor
256
256 16M
2
2
1
-
-
-
-
-
-
-
-
-
-
DP80390
15.6
64k
64k
8M
256
256 16M
5
2
1
2
1
4
-
-
-
-
-
-
-
DP80390XP
15.6
64k
64k
8M
256
256 16M
15
2
2
3
2
4
2
Interrupt sources
8M
2
Master I C Bus Controller
Internal Data Memory space
64k
Interface for additional SFRs
Stack space size
64k
Power Management Unit
off-chip
15.6
Program
Memory space
External Data / Program
Memory Wait States
on-chip ROM
DP80390CPU
Design
Architecture speed grade
on-chip RAM
External Data Memory space
The main features of each DP80390 family member have been summarized in the table below. It
gives a brief member characteristic, helping you to select the most suitable IP Core for your application. You can specify your own peripheral set (including listed below and others) and requests the
core modifications.
DP80390 family of Pipelined High Performance Microcontroller Cores
6
Copyright © 1999-2015 DCD – Digital Core Design. All Rights Reserved.
All trademarks mentioned in this document are the property
of their respective owners.
BLOCK DIAGRAM
Opcode
Decoder
prgaddr
prgdatao
prgdatai
prgramwr
xaddress
xdatao
xdatai
xdataz
ready
xdatard
xdataw
xprgrdr
xprgwr
iprgromsize
Interrupt
Controller
int0
int1
Program
Memory
Interface
PMM
Unit
pmm
stop
External
Memory
Interface
DoCD™
Debug Unit
tdi
tck
tms
tdo
rtck
coderun
debugacs
SXDM
Interface
sxdmaddr
sxdmdatao
sxdmdatai
sxdmoe
sxdmwe
Control
Unit
ramaddr
ramdatao
ramdatai
ramwe
ramoe
Internal
Data
Memory
Interface
sfraddr
sfrdatao
sfrdatai
sfrwe
sfroe
User
SFR’s
Interface
ALU
clk
reset
rsto
commonly used arithmetic functions and their
improvements are shown in the table below.
An improvement was computed as {80C51
clock periods} divided by {DP8051CPU clock
periods} required to execute an identical function. More details are available in the core
documentation.
Function
8-bit addition (immediate data)
8-bit addition (direct addressing)
8-bit addition (indirect addressing)
8-bit addition (register addressing)
8-bit subtraction (immediate data)
8-bit subtraction (direct addressing)
8-bit subtraction (indirect addressing)
8-bit subtraction (register addressing)
8-bit multiplication
8-bit division
16-bit addition
16-bit subtraction
16-bit multiplication
32-bit addition
32-bit subtraction
32-bit multiplication
Average speed improvement:
Improvement
9,00
9,00
9,00
12,00
9,00
9,00
9,00
12,00
16,00
9,60
12,00
12,00
13,60
12,00
12,00
12,60
11,12
Dhrystone Benchmark Version 2.1 was used to
measure the Core performance. The following
table shows the DP8051 performance in terms
of VAX MIPS per 1 MHz rating.
Device
DMIPS/MHz
80C51
0,00941
DP8051
0,10787
DP8051+DPTRs
0,13722
DP8051+DPTRs+SXDM
0,14457
DP8051+DPTRs+SXDM+MDU32
0,14632
Core performance in terms of DMIPS per MHz
VAX MIPS ratio
14,58
Ratio
1,00
11,46
14,58
15,36
15,55
15,36 15,55
15
11,46
PERFORMANCE
The following table gives a survey about the
Core area and performance in Programmable
Logic Devices after Place & Route (all CPU
features and peripherals have been included):
Technology /
Area
Speed grade
Fmax
optimization
[gates]
0.25u area
typical
6 050
100 MHz
0.25u speed
typical
7 600
250 MHz
0.18u area
typical
5 730
100 MHz
0.18u speed
typical
6 900
300 MHz
Core performance in ASIC devices – results given for working
system with connected IDATA, CODE and XDATA memories.
DoCD debugger increases core size about 2100 gates.
10
5
1
0
80C51
DP8051
DP8051+DPTRs
DP8051+DPTRs+SXDM
For the user, the most important factor is an
application speed improvement. The most
7
Copyright © 1999-2015 DCD – Digital Core Design. All Rights Reserved.
All trademarks mentioned in this document are the property
of their respective owners.
CONTACT
For any modifications or special requests,
please contact Digital Core Design or local
distributors.
DCD’s headquarters:
Wroclawska 94
41-902 Bytom, POLAND
e-mail: : [email protected]
tel. : +48 32 282 82 66
fax : +48 32 282 74 37
Distributors:
Please check: http://dcd.pl/sales
8
Copyright © 1999-2015 DCD – Digital Core Design. All Rights Reserved.
All trademarks mentioned in this document are the property
of their respective owners.