NXP Semiconductors LPC1102 User manual

UM10429

LPC1102 User manual

Rev. 1 — 20 October 2010 User manual

Document information

Info Content

Keywords ARM Cortex-M0, LPC1102, LPC1102UK

Abstract LPC1102 User manual

User manual Rev. 1 — 20 October 2010 2 of 258

Contact information

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: [email protected]

NXP Semiconductors UM10429

LPC1102 UM

Revision history

Rev Date Description

1 20101020 LPC1102 User manual

User manual Rev. 1 — 20 October 2010 3 of 258

1.1 Introduction

The LPC1102 is an ARM Cortex-M0 based, low-cost 32-bit MCU, designed for 8/16-bit

microcontroller applications, offering performance, low power, simple instruction set and

memory addressing together with reduced code size compared to existing 8/16-bit

architectures.

The LPC1102 operates at CPU frequencies of up to 50 MHz.

The peripheral complement of the LPC1102 includes 32 kB of flash memory, 8 kB of data

memory, one RS-485/EIA-485 UART, one SPI interface with SSP features, four general

purpose counter/timers, a 10-bit ADC, and 11 general purpose I/O pins.

1.2 Features

•System:

–ARM Cortex-M0 processor, running at frequencies of up to 50 MHz.

–ARM Cortex-M0 built-in Nested Vectored Interrupt Controller (NVIC).

–Serial Wire Debug.

–System tick timer.

•Memory:

–32 kB on-chip flash programming memory.

–8 kB SRAM.

–In-Application Programming (IAP) and In-System Programming (ISP) support via

on-chip bootloader software.

•Digital peripherals:

–11 General Purpose I/O (GPIO) pins with configurable pull-up/pull-down resistors.

–GPIO pins can be used as edge and level sensitive interrupt sources.

–Four general purpose counter/timers with a total of one capture input and nine

match outputs.

–Programmable WatchDog Timer (WDT).

•Analog peripherals:

–10-bit ADC with input multiplexing among five pins.

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Chapter 1: LPC1102 Introductory information

Rev. 1 — 20 October 2010 User manual

User manual Rev. 1 — 20 October 2010 4 of 258

NXP Semiconductors UM10429

Chapter 1: LPC1102 Introductory information

•Serial interfaces:

–UART with fractional baud rate generation, internal FIFO, and RS-485 support.

–One SPI controller with SSP features and with FIFO and multi-protocol capabilities.

•Clock generation:

–12 MHz internal RC oscillator trimmed to 1% accuracy that can optionally be used

as a system clock.

–Programmable watchdog oscillator with a frequency range of 7.8 kHz to 1.8 MHz.

–PLL allows CPU operation up to the maximum CPU rate without the need for a

high-frequency crystal. May be run from an external clock or the internal RC

oscillator.

–Clock output function with divider that can reflect the external clock, IRC clock,

CPU clock, and the Watchdog clock.

•Power control:

–Integrated PMU (Power Management Unit) to minimize power consumption during

Sleep and Deep-sleep modes.

–Power profiles residing in boot ROM allowing to optimize performance and

minimize power consumption for any given application through one simple function

call.

–Two reduced power modes: Sleep and Deep-sleep modes.

–Processor wake-up from Deep-sleep mode via a dedicated start logic using up to

six of the functional pins.

–Power-On Reset (POR).

–Brownout detect with four separate thresholds for interrupt and forced reset.

•Unique device serial number for identification.

•Single 3.3 V power supply (1.8 V to 3.6 V).

•Available as WLCSP16 package.

1.3 Ordering information

Table 1. Ordering information

Type number Package

Name Description Version

LPC1102UK WLCSP16 wafer level chip-size package; 16 bumps; 2.17 ×2.32 ×0.6 mm -

Table 2. Ordering options

Type number Flash Total

SRAM UART I2C/

Fm+ SPI ADC

channels Package

LPC1102UK 32 kB 8 kB 1 - 1 5 WLCSP16

User manual Rev. 1 — 20 October 2010 5 of 258

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Chapter 1: LPC1102 Introductory information

1.4 Block diagram

Fig 1. LPC1102 Block diagram

SRAM

8 kB

ARM

CORTEX-M0

TEST/DEBUG

INTERFACE

FLASH

32 kB

HIGH-SPEED

GPIO

AHB TO APB

BRIDGE

CLOCK

GENERATION,

POWER CONTROL,

SYSTEM

FUNCTIONS

XTALIN

RESET

clocks and

controls

SWD

LPC1102

002aaf524

slave

slave slave

ROM

slave

AHB-LITE BUS

GPIO port

PIO0/1

IRC

POR

SPI

10-bit ADC

UART

32-bit COUNTER/TIMER 0

WDT

IOCONFIG

CT32B0_MAT[3,1,0]

AD[4:0]

RXD

TXD

SYSTEM CONTROL

PMU

32-bit COUNTER/TIMER 1

CT32B1_MAT[2:0]

CT32B1_CAP0

16-bit COUNTER/TIMER 1

16-bit COUNTER/TIMER 0

CT16B0_MAT[2:0]

SCK, MISO,

MOSI

system bus

User manual Rev. 1 — 20 October 2010 6 of 258

NXP Semiconductors UM10429

Chapter 1: LPC1102 Introductory information

1.5 ARM Cortex-M0 processor

The ARM Cortex-M0 processor is described in detail in Section 19.2 “About the

Cortex-M0 processor and core peripherals”. For the LPC1102, the ARM Cortex-M0

processor core is configured as follows:

•System options:

–The Nested Vectored Interrupt Controller (NVIC) is included and supports up to 32

interrupts.

–The system tick timer is included.

•Debug options: Serial Wire Debug is included with two watchpoints and four

breakpoints.

User manual Rev. 1 — 20 October 2010 7 of 258

2.1 How to read this chapter

Table 3 shows the memory configuration for the LPC1102 part.

2.2 Memory map

Figure 2 shows the memory and peripheral address space of the LPC1102.

The AHB peripheral area is 2 MB in size and is divided to allow for up to 128 peripherals.

On the LPC1102, the GPIO ports are the only AHB peripherals. The APB peripheral area

is 512 kB in size and is divided to allow for up to 32 peripherals. Each peripheral of either

type is allocated 16 kB of space. This allows simplifying the address decoding for each

peripheral.

All peripheral register addresses are 32-bit word aligned regardless of their size. An

implication of this is that word and half-word registers must be accessed all at once. For

example, it is not possible to read or write the upper byte of a word register separately.

UM10429

Chapter 2: LPC1102 Memory mapping

Rev. 1 — 20 October 2010 User manual

Table 3. LPC1102 memory configuration

Part Flash SRAM

Suffix

LPC1102 32 kB 8 kB

User manual Rev. 1 — 20 October 2010 8 of 258

NXP Semiconductors UM10429

Chapter 2: LPC1102 Memory mapping

Fig 2. LPC1102 memory map

0x5000 0000

0x5001 0000

0x5002 0000

0x5020 0000

AHB peripherals

127 - 16 reserved

GPIO PIO1

7-4

0x5003 0000

0x5004 0000

reserved

11-8

15-12

GPIO PIO0

3-0

APB peripherals

0x4000 4000

0x4000 8000

0x4000 C000

0x4001 0000

0x4001 8000

0x4002 0000

0x4002 8000

0x4003 8000

0x4003 C000

0x4004 0000

0x4004 4000

0x4004 8000

0x4004 C000

0x4005 8000

0x4005 C000

0x4008 0000

0x4002 4000

0x4001 C000

0x4001 4000

0x4000 0000

WDT

32-bit counter/timer 0

32-bit counter/timer 1

ADC

UART

PMU

reserved

13 - 10 reserved

reserved

21 - 19 reserved

31 - 23 reserved

reserved

0x0000 0000

0 GB

0.5 GB

4 GB

1 GB

0x1000 2000

0x1FFF 0000

0x1FFF 4000

0x2000 0000

0x4000 0000

0x4008 0000

0x5000 0000

0x5020 0000

0xFFFF FFFF

reserved

APB peripherals

AHB peripherals

8 kB SRAM 0x1000 0000

LPC1102

0x0000 8000

32 kB on-chip flash

16 kB boot ROM

0x0000 0000

0x0000 00C0

active interrupt vectors

002aaf526

reserved

SPI

16-bit counter/timer 1

16-bit counter/timer 0

IOCONFIG

system control

22 reserved

flash controller

0xE000 0000

0xE010 0000

private peripheral bus

User manual Rev. 1 — 20 October 2010 9 of 258

3.1 How to read this chapter

This chapter applies to part LPC1102.

3.2 Introduction

The system configuration block controls oscillators, start logic, and clock generation of the

LPC1102. Also included in this block are registers for setting the priority for AHB access

and a register for remapping flash, SRAM, and ROM memory areas.

3.3 Pin description

Table 4 shows pins that are associated with system control block functions.

3.4 Clocking and power control

See Figure 3 for an overview of the LPC1102 Clock Generation Unit (CGU).

The LPC1102 include three independent oscillators. These are the system oscillator, the

Internal RC oscillator (IRC), and the watchdog oscillator. Each oscillator can be used for

more than one purpose as required in a particular application.

Following reset, the LPC1102 will operate from the Internal RC oscillator until switched by

software. This allows systems to operate without any external crystal and the bootloader

code to operate at a known frequency.

The SYSAHBCLKCTRL register gates the system clock to the various peripherals and

memories. UART, the WDT, and SPI0 have individual clock dividers to derive peripheral

clocks from the main clock.

For details on power control see Section 3.8.

UM10429

Chapter 3: LPC1102 System configuration

Rev. 1 — 20 October 2010 User manual

Table 4. Pin summary

Pin name Pin direction Pin description

PIO0_0; PIO0_8 to PIO0_11 I Start logic wake-up pins port 0

PIO1_0 I Start logic wake-up pin port 1

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NXP Semiconductors UM10429

Chapter 3: LPC1102 System configuration

3.5 Register description

All registers, regardless of size, are on word address boundaries. Details of the registers

appear in the description of each function.

See Section 3.11 for the flash access timing register, which can be re-configured as part

the system setup. This register is not part of the system configuration block.

Fig 3. LPC1102 CGU block diagram

SYSTEM PLL

IRC oscillator

system oscillator watchdog oscillator

IRC oscillator

watchdog oscillator

MAINCLKSEL

(main clock select)

SYSPLLCLKSEL

(system PLL clock select)

SYSTEM CLOCK

DIVIDER

AHB clock 0

(system)

AHBCLKCTRL[1:18]

SPI0 PERIPHERAL

CLOCK DIVIDER SPI0_PCLK

UART PERIPHERAL

CLOCK DIVIDER UART_PCLK

WDT CLOCK

DIVIDER WDT_PCLK

WDTUEN

(WDT clock update enable)

main clock

system clock

IRC oscillator

AHB clocks

1 to 18

(memories

and peripherals)

sys_pllclkout

sys_pllclkin

Table 5. Register overview: system control block (base address 0x4004 8000)

Name Access Address offset Description Reset

value Reference

SYSMEMREMAP R/W 0x000 System memory remap 0x002 Table 6

PRESETCTRL R/W 0x004 Peripheral reset control 0x000 Table 7

SYSPLLCTRL R/W 0x008 System PLL control 0x000 Table 8

SYSPLLSTAT R 0x00C System PLL status 0x000 Table 9

- - 0x010 - 0x01C Reserved - -

SYSOSCCTRL R/W 0x020 System oscillator control 0x000 Table 10

WDTOSCCTRL R/W 0x024 Watchdog oscillator control 0x000 Table 11

IRCCTRL R/W 0x028 IRC control 0x080 Table 12

- - 0x02C Reserved - -

Table of contents

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