8051 Single Board Computer (SBC) Version 1.0

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8051 Single Board Computer (SBC)Version 1.0

• By Wichit Sirichote
• kswichit_at_kmitl.ac.th
• http//www.kmitl.ac.th/kswichit/8051sbc/8051sbc.h
  tml

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The 8051 Single Board Computer
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8051 SBC Features

• CPU 8051 compatible with 40-pin DIP package _at_
  11.0592MHz
• MEMORY
• 27C256 32kB EPROM for monitor program
• 62256 32KB SRAM for both code and data space
• I/O
• direct CPU bus interface 2x16 line LCD
• 8-bit input port 74LS244
• 8-bit output port 74HC573
• MEMORY and I/O Decoder GAL16V8D
• EEPROM 24LC256 32KB serial eeprom
• Real-Time Clock (RTC) DS1307 with 3V Lithium
  backup
• ADC LTC1298, SPI interface 2-channel 12-bit
  Analog-to-Digital Converter
• I/O pins P1, P3 of 8051 CPU, 16-bit I/O port
• Debug LED single dot LED connected to P 1.7
• Keypad and DIP Switch 4-bit keypad and 4-bit DIP
  switch
• RS 232 Level Converter MAX232
• RS 485 75176 differential transceiver
• Serial Interface 9600 8n1
• Monitor Program Modified PAULMON2 including new
  commands

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Hardware Schematic, CPU, memory, PLD
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RS232, RS485, DC supply, EEPROM, ADC, RTC,
keypad, debug LED.
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Output Port
Data output pins

• 8-bit output port address 0x0100

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Input Port
Data input pins

• 8-bit input port address 0x0200

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12-bit Analog to Digital Converter (ADC)
Transfer Curve
Output Code
Source Linear Technology LTC1298
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12-bit Analog to Digital Converter (ADC)
Analog input pin
Digital Data output pin

• Channel 0 (Pin 2) - Analog Input (e.g. from 0 to
  5 volts)
• Data (Pin 6) - The A/D conversion result is
  shifted out of pin 6
• Data Transfer Format serial with MSB first
• Conversion Time 60µs
• Sampling Rate 11.1 Kilo Samples per second (ksps)

http//www.linear.com/pc/productDetail.jsp?navIdH
0,C1,C1155,C1001,C1158,P1445
Source Linear Technology LTC1298
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12-bit Analog to Digital Converter (ADC)

• Handshake between computer and Converter

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12-bit Analog to Digital Converter (ADC)

• Handshake between computer and Converter
• Transfer of data from MSB (i.e. Bit 11) to LSB
  (i.e. Bit 0)

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MTK51 8051 Microcontroller Trainer

• http//www.kmitl.ac.th/kswichit/mtk51/index.html

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MTK51 8051 Microcontroller Trainer
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MTK51 8051 Instruction Subset

• ACALL - Absolute Call
• ADD, ADDC - Add Accumulator (With Carry)
• AJMP - Absolute Jump
• ANL - Bitwise AND
• CJNE - Compare and Jump if Not Equal
• CLR - Clear Register
• CPL - Complement Register
• DA - Decimal Adjust
• DEC - Decrement Register

• JNB - Jump if Bit Not Set
• JNC - Jump if Carry Not Set
• JNZ - Jump if Accumulator Not Zero
• JZ - Jump if Accumulator Zero
• LCALL - Long Call
• LJMP - Long Jump
• MOV - Move Memory
• MOVC - Move Code Memory
• MOVX - Move Extended Memory

http//www.win.tue.nl/aeb/comp/8051/set8051.html