Table of Contents
About This Document .................................................................................................................... 23
Audience .............................................................................................................................................. 23
About This Manual ................................................................................................................................ 23
Related Documents ............................................................................................................................... 23
Documentation Conventions .................................................................................................................. 23
1
Architectural Overview ...................................................................................................... 26
1.1
Product Features ...................................................................................................................... 26
1.2
Target Applications .................................................................................................................... 33
1.3
High-Level Block Diagram ......................................................................................................... 34
1.4
Functional Overview .................................................................................................................. 35
1.4.1
ARM Cortex™-M3 ..................................................................................................................... 35
1.4.2
Motor Control Peripherals .......................................................................................................... 36
1.4.3
Analog Peripherals .................................................................................................................... 37
1.4.4
Serial Communications Peripherals ............................................................................................ 37
1.4.5
System Peripherals ................................................................................................................... 39
1.4.6
Memory Peripherals .................................................................................................................. 39
1.4.7
Additional Features ................................................................................................................... 40
1.4.8
Hardware Details ...................................................................................................................... 41
2
ARM Cortex-M3 Processor Core ...................................................................................... 42
2.1
Block Diagram .......................................................................................................................... 43
2.2
Functional Description ............................................................................................................... 43
2.2.1
Serial Wire and JTAG Debug ..................................................................................................... 44
2.2.2
Embedded Trace Macrocell (ETM) ............................................................................................. 44
2.2.3
Trace Port Interface Unit (TPIU) ................................................................................................. 44
2.2.4
ROM Table ............................................................................................................................... 44
2.2.5
Memory Protection Unit (MPU) ................................................................................................... 44
2.2.6
Nested Vectored Interrupt Controller (NVIC) ................................................................................ 45
3
Memory Map ....................................................................................................................... 48
4
Interrupts ............................................................................................................................ 51
5
JTAG Interface .................................................................................................................... 54
5.1
Block Diagram .......................................................................................................................... 55
5.2
Functional Description ............................................................................................................... 55
5.2.1
JTAG Interface Pins .................................................................................................................. 56
5.2.2
JTAG TAP Controller ................................................................................................................. 57
5.2.3
Shift Registers .......................................................................................................................... 58
5.2.4
Operational Considerations ........................................................................................................ 58
5.3
Initialization and Configuration ................................................................................................... 61
5.4
Register Descriptions ................................................................................................................ 61
5.4.1
Instruction Register (IR) ............................................................................................................. 61
5.4.2
Data Registers .......................................................................................................................... 63
6
System Control ................................................................................................................... 66
6.1
Functional Description ............................................................................................................... 66
6.1.1
Device Identification .................................................................................................................. 66
6.1.2
Reset Control ............................................................................................................................ 66
3
April 08, 2008
Preliminary
LM3S3748 Microcontroller