MIKROE-455 mikroElektronika, MIKROE-455 Datasheet - Page 23

• 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
17.0. Input/Output Ports
Along the right side of the development system, there are nine 10-pin connectors which are connected to the microcontroller I/O
ports. Pins P1.5, Pi.6 and P1.7 are not directly connected to the appropriate 10-pin connector, but via programmer’s multiplexer.
DIP switches SW1-SW5 enable each connector pin to be connected to one pull-up/pull-down resistor. Whether port pins are to be
connected to a pull-up or pull-down resistor depends on the position of jumpers J1-J5.
Figure 17-4: Port PORT0 connection schematic
Jumper for pull-up/pull-
down resistor selection
DIP switch to turn
on pull-up/pull-down
resistors for each pin
Microcontroller port PORT0 pins are
connected to pull-down resistors
I/O ports
2x5 PORT0 male connector
Additional module connected
to PORT1
pull-down positon
pull-up position
MikroElektronika
J2 in the
J2 in the
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