The information in this publication has been carefully
checked and is believed to be entirely accurate at
the time of publication. Samsung assumes no
responsibility, however, for possible errors or
omissions, or for any consequences resulting from
the use of the information contained herein.
Samsung reserves the right to make changes in its
products or product specifications with the intent to
improve function or design at any time and without
notice and is not required to update this
documentation to reflect such changes.
This publication does not convey to a purchaser of
semiconductor devices described herein any license
under the patent rights of Samsung or others.
Samsung makes no warranty, representation, or
guarantee regarding the suitability of its products for
any particular purpose, nor does Samsung assume
any liability arising out of the application or use of
any product or circuit and specifically disclaims any
and all liability, including without limitation any
consequential or incidental damages.
© 2001 Samsung Electronics
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in
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written consent of Samsung Electronics.
Samsung Electronics' microcontroller business has been awarded full ISO-14001
certification (BSI Certificate No. FM24653). All semiconductor products are designed
and manufactured in accordance with the highest quality standards and objectives.
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"Typical" parameters can and do vary in different
applications. All operating parameters, including
"Typicals" must be validated for each customer
application by the customer's technical experts.
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The
S3C8238/C8235/F8235 Microcontroller User's Manual
is designed for application designers and programmers
who are using the S3C8238/C8235/F8235 microcontroller for application development.
It is organized in two main parts:
Part I
Programming Model
Part II
Hardware Descriptions
Part I contains software-related information to familiarize you with the microcontroller's architecture, programming
model, instruction set, and interrupt structure. It has six chapters:
Chapter 1
Chapter 2
Chapter 3
Product Overview
Address Spaces
Addressing Modes
Chapter 4
Chapter 5
Chapter 6
Control Registers
Interrupt Structure
Instruction Set
Chapter 1, "Product Overview," is a high-level introduction to S3C8238/C8235/F8235 with general product
descriptions, as well as detailed information about individual pin characteristics and pin circuit types.
Chapter 2, "Address Spaces," describes program and data memory spaces, the internal register file, and register
addressing. Chapter 2 also describes working register addressing, as well as system stack and user-defined stack
operations.
Chapter 3, "Addressing Modes," contains detailed descriptions of the addressing modes that are supported by the
S3C8-series CPU.
Chapter 4, "Control Registers," contains overview tables for all mapped system and peripheral control register
values, as well as detailed one-page descriptions in a standardized format. You can use these easy-to-read,
alphabetically organized, register descriptions as a quick-reference source when writing programs.
Chapter 5, "Interrupt Structure," describes the S3C8238/C8235/F8235 interrupt structure in detail and further
prepares you for additional information presented in the individual hardware module descriptions in Part II.
Chapter 6, "Instruction Set," describes the features and conventions of the instruction set used for all S3C8-series
microcontrollers. Several summary tables are presented for orientation and reference. Detailed descriptions of
each instruction are presented in a standard format. Each instruction description includes one or more practical
examples of how to use the instruction when writing an application program.
A basic familiarity with the information in Part I will help you to understand the hardware module descriptions in
Part II. If you are not yet familiar with the S3C-series microcontroller family and are reading this manual for the first
time, we recommend that you first read Chapters 1–3 carefully. Then, briefly look over the detailed information in
Chapters 4, 5, and 6. Later, you can reference the information in Part I as necessary.
Part II "hardware Descriptions," has detailed information about specific hardware components of the
S3C8238/C8235/F8235 microcontroller. Also included in Part II are electrical, mechanical, Flash MCU, and
development tools data. It has 16 chapters:
Chapter 7
Chapter 8
Chapter 9
Chapter 10
Chapter 11
Chapter 12
Chapter 13
Chapter 14
Clock Circuit
RESET and Power-Down
I/O Ports
Basic Timer
8-bit Timer A/B
16-bit Timer 1
Watch Timer
LCD Controller/Driver
Chapter 15
Chapter 16
Chapter 17
Chapter 18
Chapter 19
Chapter 20
Chapter 21
Chapter 22
10-bit Analog-to-Digital Converter
Voltage Booster
Voltage Level Detector
Pattern Generation Module
Electrical Data
Mechanical Data
S3F8235 Flash MCU
Development Tools
Two order forms are included at the back of this manual to facilitate customer order for S3C8238/C8235/F8235
microcontrollers: the Mask ROM Order Form, and the Mask Option Selection Form. You can photocopy these
forms, fill them out, and then forward them to your local Samsung Sales Representative.
S3C8-Series Microcontrollers ....................................................................................................................... 1-1
S3C8238/C8235/F8235 Microcontroller........................................................................................................ 1-1
Features........................................................................................................................................................ 1-2
Block Diagram .............................................................................................................................................. 1-3
Pin Assignment ............................................................................................................................................. 1-4
Pin Assignment ............................................................................................................................................. 1-5
Pin Assignment ............................................................................................................................................. 1-6
Pin Descriptions ............................................................................................................................................ 1-7
Pin Circuits ........................................................................................................................................... 1-9
Overview ....................................................................................................................................................... 2-1
Program Memory (ROM) .............................................................................................................................. 2-2
Smart Option ........................................................................................................................................ 2-3
Register Architecture .................................................................................................................................... 2-4
Register Page Pointer (PP) .................................................................................................................. 2-6
Register Set 1....................................................................................................................................... 2-7
Register Set 2....................................................................................................................................... 2-7
Prime Register Space .......................................................................................................................... 2-8
Working Registers................................................................................................................................ 2-9
Using The Register Points ................................................................................................................... 2-10
Register Addressing...................................................................................................................................... 2-12
Common Working Register Area (C0H–CFH) ..................................................................................... 2-14
4-Bit Working Register Addressing ...................................................................................................... 2-15
8-Bit Working Register Addressing ...................................................................................................... 2-17
System And User Stack ................................................................................................................................ 2-19
Overview ....................................................................................................................................................... 3-1
Register Addressing Mode (R)...................................................................................................................... 3-2
Indirect Register Addressing Mode (IR)........................................................................................................ 3-3
Indexed Addressing Mode (X) ...................................................................................................................... 3-7
Direct Address Mode (DA) ............................................................................................................................ 3-10
Indirect Address Mode (IA) ........................................................................................................................... 3-12
Relative Address Mode (RA) ........................................................................................................................ 3-13
Immediate Mode (IM) ........................................................................................................................... 3-14
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