P REL I MIN AR Y
LM3S317 Microcontroller
D A TA S H E E T
DS-LM3S31 7-02
Co pyrigh t © 200 7 Lumin ary Micro, In c.
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Preliminary
May 4, 2007
LM3S317 Data Sheet
Table of Contents
Legal Disclaimers and Trademark Information.............................................................................. 2
Revision History ............................................................................................................................. 16
About This Document..................................................................................................................... 17
Audience........................................................................................................................................................... 17
About This Manual............................................................................................................................................ 17
Related Documents .......................................................................................................................................... 17
Documentation Conventions............................................................................................................................. 17
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 ....................................................................................................... 20
Product Features ................................................................................................................................. 20
Target Applications .............................................................................................................................. 24
High-Level Block Diagram ................................................................................................................... 25
Functional Overview ............................................................................................................................ 26
ARM Cortex™-M3 ............................................................................................................................... 26
Motor Control Peripherals .................................................................................................................... 26
Analog Peripherals .............................................................................................................................. 27
Serial Communications Peripherals..................................................................................................... 27
System Peripherals.............................................................................................................................. 28
Memory Peripherals............................................................................................................................. 29
Additional Features .............................................................................................................................. 29
Hardware Details ................................................................................................................................. 30
System Block Diagram ........................................................................................................................ 31
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........................................................................................ 32
Block Diagram ..................................................................................................................................... 33
Functional Description ......................................................................................................................... 33
Serial Wire and JTAG Debug .............................................................................................................. 33
Embedded Trace Macrocell (ETM) ...................................................................................................... 34
Trace Port Interface Unit (TPIU) .......................................................................................................... 34
ROM Table .......................................................................................................................................... 34
Memory Protection Unit (MPU) ............................................................................................................ 34
Nested Vectored Interrupt Controller (NVIC) ....................................................................................... 34
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 ........................................................................................................................ 40
Interrupts ............................................................................................................................. 42
JTAG Interface .................................................................................................................... 45
Block Diagram ..................................................................................................................................... 46
Functional Description ......................................................................................................................... 46
JTAG Interface Pins............................................................................................................................. 47
JTAG TAP Controller ........................................................................................................................... 48
Shift Registers ..................................................................................................................................... 49
Operational Considerations ................................................................................................................. 49
Initialization and Configuration............................................................................................................. 50
Register Descriptions........................................................................................................................... 51
Instruction Register (IR) ....................................................................................................................... 51
Data Registers ..................................................................................................................................... 53
6.
6.1
6.1.1
System Control.................................................................................................................... 55
Functional Description ......................................................................................................................... 55
Device Identification............................................................................................................................. 55
May 4, 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 ....................................................................................................................................... 55
Power Control ...................................................................................................................................... 58
Clock Control ....................................................................................................................................... 58
System Control .................................................................................................................................... 60
Initialization and Configuration............................................................................................................. 61
Register Map ....................................................................................................................................... 61
Register Descriptions........................................................................................................................... 62
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 .................................................................................................................. 97
Block Diagram ..................................................................................................................................... 97
Functional Description ......................................................................................................................... 97
SRAM Memory .................................................................................................................................... 97
Flash Memory ...................................................................................................................................... 98
Initialization and Configuration........................................................................................................... 100
Changing Flash Protection Bits ......................................................................................................... 100
Flash Programming ........................................................................................................................... 101
Register Map ..................................................................................................................................... 101
Register Descriptions......................................................................................................................... 102
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) ........................................................................ 114
Block Diagram ................................................................................................................................... 115
Functional Description ....................................................................................................................... 115
Data Register Operation .................................................................................................................... 116
Data Direction .................................................................................................................................... 117
Interrupt Operation............................................................................................................................. 117
Mode Control ..................................................................................................................................... 118
Pad Configuration .............................................................................................................................. 118
Identification....................................................................................................................................... 118
Initialization and Configuration........................................................................................................... 118
Register Map ..................................................................................................................................... 120
Register Descriptions......................................................................................................................... 121
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 .................................................................................................. 152
Block Diagram ................................................................................................................................... 153
Functional Description ....................................................................................................................... 153
GPTM Reset Conditions .................................................................................................................... 153
32-Bit Timer Operating Modes........................................................................................................... 153
16-Bit Timer Operating Modes........................................................................................................... 155
Initialization and Configuration........................................................................................................... 159
32-Bit One-Shot/Periodic Timer Mode ............................................................................................... 159
32-Bit Real-Time Clock (RTC) Mode ................................................................................................. 160
16-Bit One-Shot/Periodic Timer Mode ............................................................................................... 160
16-Bit Input Edge Count Mode .......................................................................................................... 160
16-Bit Input Edge Timing Mode ......................................................................................................... 161
16-Bit PWM Mode.............................................................................................................................. 161
Register Map ..................................................................................................................................... 162
Register Descriptions......................................................................................................................... 163
10.
10.1
10.2
10.3
Watchdog Timer ................................................................................................................ 184
Block Diagram ................................................................................................................................... 184
Functional Description ....................................................................................................................... 185
Initialization and Configuration........................................................................................................... 185
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Preliminary
May 4, 2007
LM3S317 Data Sheet
10.4
10.5
Register Map ..................................................................................................................................... 185
Register Descriptions......................................................................................................................... 186
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) .................................................................................. 207
Block Diagram ................................................................................................................................... 208
Functional Description ....................................................................................................................... 208
Sample Sequencers .......................................................................................................................... 208
Module Control .................................................................................................................................. 209
Hardware Sample Averaging Circuit.................................................................................................. 210
Analog-to-Digital Converter ............................................................................................................... 210
Test Modes ........................................................................................................................................ 210
Internal Temperature Sensor ............................................................................................................. 210
Initialization and Configuration........................................................................................................... 210
Module Initialization ........................................................................................................................... 211
Sample Sequencer Configuration ...................................................................................................... 211
Register Map ..................................................................................................................................... 211
Register Descriptions......................................................................................................................... 212
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 Receiver/Transmitter (UART)................................................ 237
Block Diagram ................................................................................................................................... 238
Functional Description ....................................................................................................................... 238
Transmit/Receive Logic ..................................................................................................................... 238
Baud-Rate Generation ....................................................................................................................... 239
Data Transmission ............................................................................................................................. 240
FIFO Operation .................................................................................................................................. 240
Interrupts............................................................................................................................................ 240
Loopback Operation .......................................................................................................................... 241
Initialization and Configuration........................................................................................................... 241
Register Map ..................................................................................................................................... 242
Register Descriptions......................................................................................................................... 243
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) ................................................................................. 273
Block Diagram ................................................................................................................................... 273
Functional Description ....................................................................................................................... 274
Bit Rate Generation ........................................................................................................................... 274
FIFO Operation .................................................................................................................................. 274
Interrupts............................................................................................................................................ 274
Frame Formats .................................................................................................................................. 275
Initialization and Configuration........................................................................................................... 282
Register Map ..................................................................................................................................... 283
Register Descriptions......................................................................................................................... 284
14.
14.1
14.2
14.2.1
14.3
14.4
14.5
Analog Comparator........................................................................................................... 308
Block Diagram ................................................................................................................................... 308
Functional Description ....................................................................................................................... 308
Internal Reference Programming....................................................................................................... 309
Initialization and Configuration........................................................................................................... 310
Register Map ..................................................................................................................................... 311
Register Descriptions......................................................................................................................... 311
15.
15.1
15.2
Pulse Width Modulator (PWM) ......................................................................................... 319
Block Diagram ................................................................................................................................... 319
Functional Description ....................................................................................................................... 319
May 4, 2007
Preliminary
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