Fujitsu MB95210H Series, MB95200H Series, F2MC-8FX Series Application Note

Fujitsu Microelectronics (Shanghai) Co., Ltd

Application Note

F²MC-8FX FAMILY

8-BIT MICROCONTROLLER

MB95200H/210H SERIES

MCU-AN-500009-E-10

HOW TO USE DBG PIN

APPLICATION NOTE

DBG pin operation V1.0

Revision History

Revision History

Date Author Change record

2008-03-18 Raven Peng V1.0 First draft

This document contains 12 pages.

1. The products described in this manual and the specifications thereof may be changed without prior notice.
To obtain up-to-date information and/or specifications, contact your Fujitsu sales representative or Fujitsu
authorized dealer.

2. Fujitsu will not be liable for infringement of copyright, industrial property right, or other rights of a third party
caused by the use of information or drawings described in this manual.

3. The contents of this manual may not be transferred or copied without the express permission of Fujitsu.

4. The products contained in this document are not intended for use with equipments which require extremely
high reliability such as aerospace equipments, undersea repeaters, nuclear control systems or medical
equipment for life support.

5. Some of the products described in this manual may be strategic materials (or special technology) as defined
by the Foreign Exchange and Foreign Trade Control Law. In such cases, the products or portions theory
must not be exported without permission as defined under the law.

© 2008 Fujitsu Microelectronics (Shanghai) Co., Ltd

MCU-AN-500009-E-10 – Page 2

Contents

DBG pin operation V1.0

Contents

REVISION HISTORY............................................................................................................ 2

CONTENTS .......................................................................................................................... 3

1 INTRODUCTION.............................................................................................................. 4

2 FUNCTIONS OF DBG PIN............................................................................................... 5

2.1 DBG pin hardware connection (debug mode).......................................................... 5

2.2 Performance in debug mode ................................................................................... 5

2.3 Performance in free-run mode................................................................................. 5

3 HOW TO USE DBG PIN................................................................................................... 6

3.1 Used as 1-line UART pin / P12 pin.......................................................................... 6

3.2 Used as EC0 pin ..................................................................................................... 6

4 PRECAUTIONS IN USING DBG PIN............................................................................... 7

5 SAMPLE CODE ............................................................................................................... 8

MCU-AN-500009-E-10 – Page 3

DBG pin operation V1.0

Chapter 1 Introduction

1 Introduction

This application note describes how to use DBG pin. The DBG pin can be used as 1-line
UART communication port in debug mode and can be used as P12/EC0 in free-run mode.

MCU-AN-500009-E-10 – Page 4