MIKROE-455 mikroElektronika, MIKROE-455 Datasheet - Page 9

• Manufacturer Part Number: MIKROE-455
• Description: Development Boards & Kits - 8051 EASY8051 V6 DEVELOPMENT SYSTEM
• Manufacturer: mikroElektronika

Specifications of MIKROE-455

• Rohs: yes
• Product: Development Kits
• Tool Is For Evaluation Of: AT89S8253
• Core: 8051
• Interface Type: CAN, MMC/SD, RS-232, USB
• Operating Supply Voltage: 5 V, 9 V to 32 V
• Data Bus Width: 8 bit
• Description/function: Development Board Only, GLCD, LCD, DS1820, Serial Cable not included
• Dimensions: 265 mm x 220 mm
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• For Use With: AT89S8253

Easy8051 v6 Development System
8051 microcontrollers are programmed using SPI serial communication which employs MISO, MOSI and SCK microcontroller pins.
4.0. Clock Oscillator
There is a quartz oscillator used as an external clock signal source provided on the board. A quartz crystal, used for stabilizing clock
frequency, is plugged into the appropriate socket and can always be replaced with another one. The maximum value thereof depends
on the microcontroller maximum operating frequency allowed. The function of the P4.0/OSC pin depends on the jumper J8 position.
When this jumper is set to the OSC position, the P4.0/OSC pin will be fed with a clock signal. When it is set to the P4.0 position, the
P4.0/OSC pin is available as input/output pin. The same is with jumper J16 and the MP3.2 pin. When this jumper is set to the OSC
position, the MP3.2 pin will be fed with a clock signal. When it is set to the P3.2 position, the MP3.2 pin is available as an input/output
pin.
Oscillator
Quartz-crystal X2 is placed
in appropriate socket and
can be easily replaced with
another one.
Oscillator schematic
During programming, a multiplexer disconnects
the microcontroller pins used for programming
from the rest of the board and connects them
to the 8051prog programmer. After completing
the programming process, these pins are
automatically disconnected from the programmer
and may be used as input/output pins.
MikroElektronika
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