
HardwareHardware
S1C6S3N2 TECHNICAL HARDWARE
EPSON
I-i
CONTENTS
CHAPTER 1
OVERVIEW ....................................................................... I-1
1.1
Configuration ................................................................... I-1
1.2
Features .......................................................................... I-2
1.3
Block Diagram ................................................................. I-3
1.4
Pin Layout Diagram ......................................................... I-4
1.5
Pin Description ................................................................ I-5
CHAPTER 2
POWER SUPPLY AND INITIAL RESET ................................ I-6
2.1
Power Supply .................................................................. I-6
2.2
Initial Reset ..................................................................... I-10
Reset pin (RESET) ................................................... I-11
Simultaneous high input to input ports (K00–K03) .. I-11
Watchdog timer (Auxiliary reset) .............................. I-11
Oscillation detection circuit (Auxiliary reset) ............ I-12
Internal register at initial setting ............................. I-12
2.3
Test Terminal (TEST) ..................................................... I-12
CHAPTER 3
CPU, ROM, RAM ............................................................ I-13
3.1
CPU ................................................................................ I-13
3.2
ROM ............................................................................... I-14
3.3
RAM ............................................................................... I-15
CHAPTER 4
PERIPHERAL CIRCUITS AND OPERATION ...................... I-16
4.1
Memory Map .................................................................. I-16
4.2
Resetting Watchdog Timer ............................................. I-24
Configuration of watchdog timer .............................. I-24
Mask option ............................................................ I-24
Control of watchdog timer ....................................... I-25
Programming note ................................................... I-25