MSP430 vs 8051 | Difference between MSP430 and 8051 MicrocontrollerThis page compares microcontroller MSP430 vs 8051 and describes difference between MSP430 and 8051 microcontroller. The useful links to difference between various terms are provided here.
MSP430 is the microcontroller developed by Texas Instruments (TI).
Following are the features of MSP430 Microcontroller:
• It is 16 bit in size and consists of special features commonly not supported by generic 8051 microcontroller.
• It includes LCD control, ADC, Input / Output ports, RAM, ROM, watchdog timer, basic timer, UART etc.
• It consumes very low power which is about 4.2 nW per instruction.
• It has high speed of operation i.e. it takes about 300 ns per instruction @ clock of 3.3 MHz .
• It is based on RISC architecture.
• It supports 7 addressing modes for source operand and 4 for destination operand.
• MSP430 has three sub-families viz. MSP430C31x, MSP430C32x and MSP430C33x.
The figure-1 depicts MSP430 microcontroller architecture.
The figure-2 depicts MSP430 Pin diagram.
8051 is the microcontroller developed by Intel.
Following are the features of 8051 Microcontroller:
• It houses 8 bit CPU.
• 4 KByte ROM used for code or program storage
• 128 Byte RAM to store data or variables used in program
• 32 Input/Output lines with 4 ports ( 8 lines per port)
• 2 Timers used for introducing delay and for setting the baud rate for data communication.
• 1 serial Port with one TxD and one RxD line used for serial communication with external devices.
• 6 Interrupt Sources
• Clock oscillator circuit runs at 12MHz frequency.
The figure-3 depicts 8051 microcontroller architecture. Refer 8051 Architecture➤
The figure-4 depicts 8051 pin diagram.
Following table summarizes similarities and difference between MSP430 and 8051.
|RAM||128/256/512 Bytes RAM/SRAM|| 256 bytes
Used for data storage
|ROM||2/4/8/16 KB ROM|| 4KB ROM available internally
64KB (max.) can be interfaced external to microcontroller
Used for program storage
|CPU (Number of bits in size)||16 bit||8 bit|
|I/O ports (without interrupt)|| 0 (MSP430C31x, MSP430C32x)
|Four number of I/O ports are available , each with 8 lines|
|I/O ports (with interrupt)|| 8 (MSP430C31x, MSP430C32x)
|Four number of I/O ports , uses 2 interrupt lines INT0 and INT1|
|Crystal Oscillator frequency||Supported 32.768 KHz crystal|| Supports 4 MHz to 30 MHz
Nominal: 11.0592 MHz
|Watchdog timer||Supported in all sub-families||Not supported|
|HW multiplier||Supported in MSP430C33x sub family||Not supported|
|A to D converter||12 bit and 14 bit modes are available
Supports measurement modes viz. ratiometric and absolute
|D to A converter||supported||Not supported|
|LCD||Supported||Not supported, external interfacing circuit to be developed|
|SPI/I2C interfaces||Supported||Not Supported|
Refer our Page on what a microcontroller does.
Refer our Page on microcontroller programming using C language including example.
Refer our Page on microcontroller development kit manufacturers.
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