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Table of Contents

Table of Contents........................................................................................ 1

List of table............................................................................................... 4

List of figures............................................................................................. 5

1 Introduction........................................................................................... 6

2 Description ............................................................................................ 7

3 Functional overview................................................................................. 9

3.1

ARM®-Cortex®-M0 core with embedded Flash and SRAM ........................... 9

3.2

Memories ................................................................................... 9

3.3

Boot modes................................................................................. 9

3.4

System configuration controller (SYSCFG)............................................10

3.5

Power management ......................................................................10

3.5.1

Power supply schemes ...........................................................10

3.5.2

Low-power modes ................................................................10

3.6

Clocks and startup .......................................................................11

3.6.1

External Oscillator Clock ........................................................11

3.6.2

RC oscillator clock ................................................................12

3.6.3

PLL ..................................................................................12

3.6.4

Generated clock ..................................................................12

3.7

Interrupts and events....................................................................13

3.7.1

Nested vectored interrupt controller (NVIC)..................................13

3.7.2

Event controller...................................................................13

3.8

Tcp/ip offload engine (TOE) ............................................................13

3.9

General-purpose inputs/outputs (GPIOs) .............................................14

3.10

Pad controller (PADCON) ................................................................14

3.11

Alternative function controller (AFC) .................................................16

3.12

External interrupt (EXTI)................................................................18

3.13

Direct memory access controller (DMA) ..............................................19

3.14

Timers and watchdogs ...................................................................19

3.14.1

System tick timer .................................................................19

3.14.2

Pulse-Width Modulation (PWM) .................................................20

3.14.3

Dual timers ........................................................................20

3.14.4

Watchdog timer ...................................................................20

3.15

Real-time clock (RTC) ...................................................................21

3.15.1

RTC clock ..........................................................................21

3.15.2

RTC interrupt ......................................................................21

3.16

Universal asynchronous receiver/transmitter (UART)...............................21

3.17

Synchronous Serial Port (SSP) ..........................................................22