M031BT
TABLE OF CONTENTS
1 GENERAL DESCRIPTION ..............................................................................9
2 FEATURES....................................................................................................10
2.1 M031BT Features........................................................................................................ 10
3 PARTS INFORMATION.................................................................................16
3.1 Package Type .............................................................................................................. 16
3.2 M031BT Series Selection Guide............................................................................... 17
3.2.1 M031BT Series (M031BTYx)........................................................................................17
3.2.2 Naming Rule ...................................................................................................................18
4 PIN CONFIGURATION ..................................................................................19
4.1 Pin Configuration......................................................................................................... 19
4.1.1 M031BT Series Pin Diagram ........................................................................................19
4.1.2 M031BT Series Multi-function Pin Diagram................................................................20
4.2 Pin Mapping ................................................................................................................. 23
4.3 Pin Function Description ............................................................................................ 25
5 BLOCK DIAGRAM.........................................................................................29
6 FUNCTIONAL DESCRIPTION.......................................................................30
6.1 Arm® Cortex®-M0 Core............................................................................................... 30
6.2 System Manager ......................................................................................................... 32
6.2.1 Overview..........................................................................................................................32
6.2.2 System Reset..................................................................................................................32
6.2.3 System Power Distribution............................................................................................38
6.2.4 Power Modes and Wake-up Sources..........................................................................38
6.2.5 System Memory Map.....................................................................................................41
6.2.6 SRAM Memory Orginization .........................................................................................43
6.2.7 Chip Bus Matrix ..............................................................................................................44
6.2.8 IRC Auto Trim..................................................................................................................44
6.2.9 Register Lock Control ....................................................................................................45
6.2.10UART0_TXD/USCI0_DAT1 modulation with PWM...................................................50
6.2.11System Timer (SysTick).................................................................................................51
6.2.12Nested Vectored Interrupt Controller (NVIC)..............................................................52
6.3 Clock Controller ........................................................................................................... 55
6.3.1 Overview..........................................................................................................................55
6.3.2 Clock Generator..............................................................................................................57
6.3.3 System Clock and SysTick Clock.................................................................................58
6.3.4 Peripherals Clock ...........................................................................................................59
6.3.5 Power-down Mode Clock ..............................................................................................59
6.3.6 Clock Output ...................................................................................................................60
Aug. 18, 2020
Page 2 of 140
Rev. 1.01
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