Digilent 6014-210-000-KIT - Manual (Page 2)

8051 Reference Manual Digilent, Inc.
www.digilentinc.com page 2 of 4
Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.
Features of the DS89C450 include:
•
On-chip loader using a serial port
•
two USART serial interfaces (COM
ports)
•
three 16-bit timer counters
•
64KB program flash
•
256B scratchpad RAM
•
1KB on-chip RAM accessible with
MOVX instruction.
For more information on the DS89C450
microcontroller, refer to the data sheet
available at
www.maxim-ic.com .
Functional Description
The 8051 is designed for embedded control
and robotic applications as well as
microprocessor experimentation.
The 8051 has an on-chip loader/programmer:
The loader / programmer is accessed via
Serial COM Port #0 DB9 Connector.
The 8051 Trainer features a flexible power
supply routing system with VCC and GND pin
available on 20 pin male and female
connector for powering the ICs on the bread
board as well as Digilent Pmod peripheral
modules connected to the board.
Digilent Pmod peripheral modules can be
connected to the connectors on the 8051
Trainer board via cables. Digilent has a
variety of Pmod interconnect cables
available.
Power supply
The 8051 Trainer board may be powered via
the dedicated power supply connector.
The 8051 Trainer board is designed for
operation at 5V. Using a voltage other than
5V can damage the 8051 trainer or the
connected devices. ***Note: the earlier rev of
the board indicated in the silk screen that the
operating voltage range was 7.5V-12V. If this
didn’t get changed in the current rev, we
need to note that the silk screen voltage
doesn’t apply***
There is a power supply connector on 8051
trainer for board/processor. The barrel
connector is useful for desktop development
and testing. It is the connector used by the
DC supply adapter available from Digilent.
Programming the 8051 Trainer
The 8051 Trainer programming can be
accomplished using Serial#0. Programming
via Serial#0 requires use of the
HyperTerminal program which comes with
the Microsoft Windows Operating System.
For more information on programming the
8051 trainer and access some sample codes,
refer to
www.microdigitaled.com
RS232 compatible Serial
connectors (DB9)
The DS89C450 microcontroller provides 2
USART serial interfaces. The 8051 trainer
board comes with MAX232 to convert TTL
voltage level to RS232. So you can connect
the 8051 trainer board directly to a PC.
Jumper Settings for second serial port
Jumpers S1 and S2 are provided for
connection the second serial port. If no
jumper is connected to S1 and S2, then the
P1.2 and P1.3 are disconnected from
MAX232 and can be used as simple I/O pins.
Crystal Oscillator
The DS89C450 microcontroller supports
numerous clock source options for the main
processor operating clock. The 8051 Trainer
has an 11.0592 MHz oscillator crystal.
11.0592 MHz oscillator crystal makes you
enable to connect the 8051 trainer board to
PC by COM port and the serial transfer error
will be as low as zero.