AT89S8252 Development Board - Technical

Microcontroller

• Microcontroller: AT89S8252-24PC
• Manufacturer: Atmel / Microchip
• Main Crystal: 18.432MHz
• Speed: 18.432MHz
• Processor Language: 8051

Memory

• Program Flash Memory (Internal): 8kBytes
• RAM Memory (Internal): 256Bytes
• EEPROM Memory (Internal): 2kBytes
• EEPROM Memory (External): 64kBytes (24LC512 Optional)

Input/Output

• I/O Points Available: 32
• I/O Points Connection: 34 + 20 Way Header Connectors
• LCD Connection: 14 Way Header with Trimpot Contrast Adjustment
• RS232 Connection: 4 Way Polarized Connector
• RS422/RS485 Connection: 6 Way Polarized Connector

A/D

• A/D (External): Yes - 2 Channels 12-Bit (LTC1298 Optional)
• A/D Connections: 5 Way Polarized Connector

Clocks/Timers

• Real Time Clock: DS1307 (Optional)
• Real Time Clock Crystal: 32.7kHz
• Battery Back-Up: Yes - 1.5V Watch Battery (Optional)

Communication

• RS232 Communication: Yes - 1 Channel
• RS422 Communication: Yes - (75176 Optional)
• RS485 Communication: Yes - (75176x2 Optional)

Ancillary Features

• In-Circuit Programming: Yes
• Power-On LED: Yes - Red
• Reset Button: Yes
• Programming LED: Yes

Power Supply

• Power-Supply: 9 - 12 Vdc

Dimensions

• LxWxH: 148mm x 67mm x 42mm

Parts Supplied

• Included Parts: AT89S8252 Development Board, Download Unit, Download Software, Manual on CD, Examples and Sample Code,

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