I TEXAS
INSTRUMENTS
Table of Contents
1 Features............................................................................1
2 Applications..................................................................... 1
3 Description.......................................................................1
4 Functional Block Diagrams............................................ 3
5 Revision History.............................................................. 5
6 Device Comparison......................................................... 6
6.1 Related Products........................................................ 6
7 Terminal Configuration and Functions..........................7
7.1 Pin Diagrams.............................................................. 7
7.2 Signal Descriptions................................................... 10
8 Specifications................................................................ 15
8.1 Absolute Maximum Ratings...................................... 15
8.2 ESD Ratings............................................................. 15
8.3 Recommended Operating Conditions.......................15
8.4 Active Mode Supply Current Into VCC Excluding
External Current.......................................................... 16
8.5 Low-Power Mode Supply Currents (Into VCC)
Excluding External Current..........................................17
8.6 Thermal Resistance Characteristics......................... 18
8.7 Schmitt-Trigger Inputs – General-Purpose I/O..........18
8.8 Inputs – Ports P1 and P2.......................................... 18
8.9 Leakage Current – General-Purpose I/O.................. 19
8.10 Outputs – General-Purpose I/O (Full Drive
Strength)......................................................................20
8.11 Outputs – General-Purpose I/O (Reduced Drive
Strength)......................................................................20
8.12 Output Frequency – General-Purpose I/O.............. 20
8.13 Typical Characteristics – Outputs, Reduced
Drive Strength (PxDS.y = 0)........................................21
8.14 Typical Characteristics – Outputs, Full Drive
Strength (PxDS.y = 1)................................................. 22
8.15 Crystal Oscillator, XT1, Low-Frequency Mode........23
8.16 Crystal Oscillator, XT1, High-Frequency Mode.......24
8.17 Crystal Oscillator, XT2............................................ 25
8.18 Internal Very-Low-Power Low-Frequency
Oscillator (VLO)...........................................................26
8.19 Internal Reference, Low-Frequency Oscillator
(REFO)........................................................................ 26
8.20 DCO Frequency...................................................... 27
8.21 PMM, Brownout Reset (BOR).................................28
8.22 PMM, Core Voltage.................................................28
8.23 PMM, SVS High Side..............................................29
8.24 PMM, SVM High Side............................................. 29
8.25 PMM, SVS Low Side...............................................30
8.26 PMM, SVM Low Side.............................................. 30
8.27 Wake-up Times From Low-Power Modes and
Reset........................................................................... 30
8.28 Timer_A...................................................................31
8.29 Timer_B...................................................................31
8.30 USCI (UART Mode) Clock Frequency.................... 31
8.31 USCI (UART Mode)................................................ 31
8.32 USCI (SPI Master Mode) Clock Frequency............ 32
8.33 USCI (SPI Master Mode)........................................ 32
8.34 USCI (SPI Slave Mode).......................................... 34
8.35 USCI (I2C Mode).....................................................36
8.36 12-Bit ADC, Power Supply and Input Range
Conditions................................................................... 37
8.37 12-Bit ADC, Timing Parameters..............................37
8.38 12-Bit ADC, Linearity Parameters Using an
External Reference Voltage or AVCC as
Reference Voltage.......................................................38
8.39 12-Bit ADC, Linearity Parameters Using the
Internal Reference Voltage..........................................38
8.40 12-Bit ADC, Temperature Sensor and Built-In
VMID ............................................................................ 39
8.41 REF, External Reference........................................ 40
8.42 REF, Built-In Reference.......................................... 41
8.43 Flash Memory......................................................... 42
8.44 JTAG and Spy-Bi-Wire Interface.............................42
9 Detailed Description......................................................43
9.1 CPU ......................................................................... 43
9.2 Operating Modes...................................................... 44
9.3 Interrupt Vector Addresses....................................... 45
9.4 Memory Organization................................................46
9.5 Bootloader (BSL)...................................................... 46
9.6 JTAG Operation........................................................ 47
9.7 Flash Memory .......................................................... 48
9.8 RAM ......................................................................... 48
9.9 Peripherals................................................................48
9.10 Input/Output Diagrams............................................69
9.11 Device Descriptors.................................................. 95
10 Device and Documentation Support..........................98
10.1 Getting Started........................................................98
10.2 Device Nomenclature..............................................98
10.3 Tools and Software............................................... 100
10.4 Documentation Support........................................ 102
10.5 Support Resources............................................... 103
10.6 Trademarks........................................................... 103
10.7 Electrostatic Discharge Caution............................104
10.8 Export Control Notice............................................104
10.9 Glossary................................................................104
11 Mechanical, Packaging, and Orderable
Information.................................................................. 105
MSP430F5438A, MSP430F5437A, MSP430F5436A
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SLAS655H – JANUARY 2010 – REVISED MAY 2021 www.ti.com
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