MSP432 Microcontroller Features and Functionality, Lecture notes of Computer Integrated Manufacturing

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Embedded Systems

Micro Controller Unit (MCU) MSP432 P401R MSP430 G2x René Beuchat Laboratoire d'Architecture des Processeurs rene.beuchat@epfl.ch From ti documentation 1

Microcontroller

• A microcontroller is an integrated circuit with: ➢A processor (one or many) ➢Some memories as: ➢Flash EPROM ➢SRAM ➢Some programmable interfaces as: ➢GPIO (parallel port) ➢Timer ➢Serial port (UART, SPI, i2c, USB, …) ➢ADC, DAC ➢Lot more… 2

General View, MSP 4

General View, MSP432P 6

Features MSP

• Core ➢ARM ® 32 - Bit Cortex ® - M4F CPU With Floating- Point Unit and Memory Protection Unit ➢Frequency up to 48 MHz ➢ULPBench™ Benchmark: ➢192.3 ULPMark™-CP ➢Performance Benchmark: ➢3.41 CoreMark/MHz ➢1.22 DMIPS/MHz (Dhrystone 2.1) 8

Features

• Advanced Low-Power Analog Features ➢SAR Analog-To-Digital Converter (ADC) With 16 - Bit Precision and up to 1 Msps ➢Differential and Single-Ended Inputs ➢Two Window Comparators ➢Up to 24 Input Channels ➢Internal Voltage Reference With 10-ppm/°C Typical Stability ➢Two Analog Comparators 9

Features

• Ultra-Low-Power Operating Modes ➢Active: 80 μA/MHz ➢Low-Frequency Active: 83 μA at 128 kHz ➢LPM3 (With RTC): 660 nA ➢LPM3.5 (With RTC): 630 nA ➢LPM4: 500 nA ➢LPM4.5: 25 nA 11

Features

• Operating Characteristics ➢Wide Supply Voltage Range: 1.62 V to 3.7 V ➢Temperature Range (Ambient): – 40 °C to 85 °C
• JTAG and Debug Support ➢ 4 - Pin JTAG and 2-Pin SWD Debug Interfaces ➢Serial Wire Trace ➢Power Debug and Profiling of Applications 13

Features

• Flexible Clocking Features ➢ Tunable Internal DCO (up to 48 MHz) ➢ 32.768-kHz Low-Frequency Crystal Support (LFXT) ➢ High-Frequency Crystal Support (HFXT) up to 48 MHz ➢ Low-Frequency Internal Reference Oscillator (REFO) ➢ Very Low-Power Low-Frequency Internal Oscillator (VLO) ➢ Module Oscillator (MODOSC) ➢ System Oscillator (SYSOSC) 15

Features

• Enhanced System Features ➢Programmable Supervision and Monitoring of Supply Voltage ➢Multiple-Class Resets for Better Control of Application and Debug ➢ 8 - Channel DMA ➢RTC With Calendar and Alarm Functions 16

Features

• Timing and Control ➢Up to Four 16-Bit Timers, Each With up to Five Capture, Compare, PWM Capability ➢Two 32-Bit Timers, Each With Interrupt Generation Capability 18

Features

• Serial Communication ➢Up to Four eUSCI_A Modules ➢UART With Automatic Baud-Rate Detection ➢IrDA Encode and Decode ➢SPI (up to 16 Mbps) ➢Up to Four eUSCI_B Modules ➢I 2 C (With Multiple-Slave Addressing) ➢SPI (up to 16 Mbps) 19

Parallel Port One bit of port P4 of MSP432P401R 21 http://www.ti.com/lit/ds/symlink/msp432p401r.pdf p.

Parallel Port control registers

• PyIN is the state at the pin level and can be read
• PySEL1, PySEL0 select the pin function. “00”  As Port “01”  module 1 “10”  module 2 “11”  Analog module for Ports 4, 5, 6, 8, 9
• As Port, PyOUT specifies the data to output
• PyDIR specifies the direction (‘0’ as input (reset state), ‘1’ as output)
• PyREN (Resistor Enable) allows a Pull_up or Pull_Down to be activated if the direction is Input 22