P REL I MIN AR Y
LM3S315 Microcontroller
D A TA S H E E T
DS-LM3S31 5-04
Co pyrigh t © 200 7 Lumin ary Micro, In c.
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Preliminary
April 27, 2007
LM3S315 Data Sheet
Table of Contents
Legal Disclaimers and Trademark Information.............................................................................. 2
Revision History ............................................................................................................................. 16
About This Document..................................................................................................................... 18
Audience........................................................................................................................................................... 18
About This Manual............................................................................................................................................ 18
Related Documents .......................................................................................................................................... 18
Documentation Conventions............................................................................................................................. 18
1.
1.1
1.2
1.3
1.4
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
1.4.7
1.4.8
1.5
Architectural Overview ....................................................................................................... 21
Product Features ................................................................................................................................. 21
Target Applications .............................................................................................................................. 25
High-Level Block Diagram ................................................................................................................... 26
Functional Overview ............................................................................................................................ 27
ARM Cortex™-M3 ............................................................................................................................... 27
Motor Control Peripherals .................................................................................................................... 27
Analog Peripherals .............................................................................................................................. 28
Serial Communications Peripherals..................................................................................................... 28
System Peripherals.............................................................................................................................. 29
Memory Peripherals............................................................................................................................. 30
Additional Features .............................................................................................................................. 30
Hardware Details ................................................................................................................................. 31
System Block Diagram ........................................................................................................................ 32
2.
2.1
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
ARM Cortex-M3 Processor Core........................................................................................ 33
Block Diagram ..................................................................................................................................... 34
Functional Description ......................................................................................................................... 34
Serial Wire and JTAG Debug .............................................................................................................. 34
Embedded Trace Macrocell (ETM) ...................................................................................................... 35
Trace Port Interface Unit (TPIU) .......................................................................................................... 35
ROM Table .......................................................................................................................................... 35
Memory Protection Unit (MPU) ............................................................................................................ 35
Nested Vectored Interrupt Controller (NVIC) ....................................................................................... 35
3.
4.
5.
5.1
5.2
5.2.1
5.2.2
5.2.3
5.2.4
5.3
5.4
5.4.1
5.4.2
Memory Map ........................................................................................................................ 41
Interrupts ............................................................................................................................. 43
JTAG Interface .................................................................................................................... 46
Block Diagram ..................................................................................................................................... 47
Functional Description ......................................................................................................................... 47
JTAG Interface Pins............................................................................................................................. 48
JTAG TAP Controller ........................................................................................................................... 49
Shift Registers ..................................................................................................................................... 50
Operational Considerations ................................................................................................................. 50
Initialization and Configuration............................................................................................................. 51
Register Descriptions........................................................................................................................... 52
Instruction Register (IR) ....................................................................................................................... 52
Data Registers ..................................................................................................................................... 54
6.
6.1
6.1.1
System Control.................................................................................................................... 56
Functional Description ......................................................................................................................... 56
Device Identification............................................................................................................................. 56
April 27, 2007
Preliminary
3
Table of Contents
6.1.2
6.1.3
6.1.4
6.1.5
6.2
6.3
6.4
Reset Control ....................................................................................................................................... 56
Power Control ...................................................................................................................................... 59
Clock Control ....................................................................................................................................... 59
System Control .................................................................................................................................... 61
Initialization and Configuration............................................................................................................. 62
Register Map ....................................................................................................................................... 62
Register Descriptions........................................................................................................................... 63
7.
7.1
7.2
7.2.1
7.2.2
7.3
7.3.1
7.3.2
7.4
7.5
Internal Memory .................................................................................................................. 98
Block Diagram ..................................................................................................................................... 98
Functional Description ......................................................................................................................... 98
SRAM Memory .................................................................................................................................... 98
Flash Memory ...................................................................................................................................... 99
Initialization and Configuration........................................................................................................... 101
Changing Flash Protection Bits ......................................................................................................... 101
Flash Programming ........................................................................................................................... 102
Register Map ..................................................................................................................................... 102
Register Descriptions......................................................................................................................... 103
8.
8.1
8.2
8.2.1
8.2.2
8.2.3
8.2.4
8.2.5
8.2.6
8.3
8.4
8.5
General-Purpose Input/Outputs (GPIOs) ........................................................................ 115
Block Diagram ................................................................................................................................... 116
Functional Description ....................................................................................................................... 117
Data Register Operation .................................................................................................................... 117
Data Direction .................................................................................................................................... 118
Interrupt Operation............................................................................................................................. 118
Mode Control ..................................................................................................................................... 119
Pad Configuration .............................................................................................................................. 119
Identification....................................................................................................................................... 119
Initialization and Configuration........................................................................................................... 119
Register Map ..................................................................................................................................... 121
Register Descriptions......................................................................................................................... 122
9.
9.1
9.2
9.2.1
9.2.2
9.2.3
9.3
9.3.1
9.3.2
9.3.3
9.3.4
9.3.5
9.3.6
9.4
9.5
General-Purpose Timers .................................................................................................. 153
Block Diagram ................................................................................................................................... 154
Functional Description ....................................................................................................................... 154
GPTM Reset Conditions .................................................................................................................... 154
32-Bit Timer Operating Modes........................................................................................................... 154
16-Bit Timer Operating Modes........................................................................................................... 156
Initialization and Configuration........................................................................................................... 160
32-Bit One-Shot/Periodic Timer Mode ............................................................................................... 160
32-Bit Real-Time Clock (RTC) Mode ................................................................................................. 161
16-Bit One-Shot/Periodic Timer Mode ............................................................................................... 161
16-Bit Input Edge Count Mode .......................................................................................................... 161
16-Bit Input Edge Timing Mode ......................................................................................................... 162
16-Bit PWM Mode.............................................................................................................................. 162
Register Map ..................................................................................................................................... 163
Register Descriptions......................................................................................................................... 164
10.
10.1
10.2
Watchdog Timer ................................................................................................................ 185
Block Diagram ................................................................................................................................... 185
Functional Description ....................................................................................................................... 186
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Preliminary
April 27, 2007
LM3S315 Data Sheet
10.3
10.4
10.5
Initialization and Configuration........................................................................................................... 186
Register Map ..................................................................................................................................... 186
Register Descriptions......................................................................................................................... 187
11.
11.1
11.2
11.2.1
11.2.2
11.2.3
11.2.4
11.2.5
11.2.6
11.3
11.3.1
11.3.2
11.4
11.5
Analog-to-Digital Converter (ADC) .................................................................................. 208
Block Diagram ................................................................................................................................... 209
Functional Description ....................................................................................................................... 209
Sample Sequencers .......................................................................................................................... 209
Module Control .................................................................................................................................. 210
Hardware Sample Averaging Circuit.................................................................................................. 211
Analog-to-Digital Converter ............................................................................................................... 211
Test Modes ........................................................................................................................................ 211
Internal Temperature Sensor ............................................................................................................. 211
Initialization and Configuration........................................................................................................... 211
Module Initialization ........................................................................................................................... 212
Sample Sequencer Configuration ...................................................................................................... 212
Register Map ..................................................................................................................................... 212
Register Descriptions......................................................................................................................... 213
12.
12.1
12.2
12.2.1
12.2.2
12.2.3
12.2.4
12.2.5
12.2.6
12.3
12.4
12.5
Universal Asynchronous Receivers/Transmitters (UARTs).......................................... 238
Block Diagram ................................................................................................................................... 239
Functional Description ....................................................................................................................... 239
Transmit/Receive Logic ..................................................................................................................... 239
Baud-Rate Generation ....................................................................................................................... 240
Data Transmission ............................................................................................................................. 241
FIFO Operation .................................................................................................................................. 241
Interrupts............................................................................................................................................ 241
Loopback Operation .......................................................................................................................... 242
Initialization and Configuration........................................................................................................... 242
Register Map ..................................................................................................................................... 243
Register Descriptions......................................................................................................................... 244
13.
13.1
13.2
13.2.1
13.2.2
13.2.3
13.2.4
13.3
13.4
13.5
Synchronous Serial Interface (SSI) ................................................................................. 274
Block Diagram ................................................................................................................................... 274
Functional Description ....................................................................................................................... 275
Bit Rate Generation ........................................................................................................................... 275
FIFO Operation .................................................................................................................................. 275
Interrupts............................................................................................................................................ 275
Frame Formats .................................................................................................................................. 276
Initialization and Configuration........................................................................................................... 283
Register Map ..................................................................................................................................... 284
Register Descriptions......................................................................................................................... 285
14.
14.1
14.2
14.2.1
14.3
14.4
14.5
Analog Comparator........................................................................................................... 309
Block Diagram ................................................................................................................................... 309
Functional Description ....................................................................................................................... 309
Internal Reference Programming....................................................................................................... 310
Initialization and Configuration........................................................................................................... 311
Register Map ..................................................................................................................................... 312
Register Descriptions......................................................................................................................... 312
15.
15.1
15.2
Pulse Width Modulator (PWM) ......................................................................................... 320
Block Diagram ................................................................................................................................... 320
Functional Description ....................................................................................................................... 320
April 27, 2007
Preliminary
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