
S1C6S460 TECHNICAL MANUAL
EPSON
i
CONTENTS
CONTENTS
CHAPTER
1OUTLINE ________________________________________________ 1
1.1
Features ......................................................................................................... 1
1.2
Block Diagram .............................................................................................. 2
1.3
Pin Layout Diagram ..................................................................................... 3
1.4
Pin Description ............................................................................................. 4
CHAPTER
2 CPU AND BUILT-IN MEMORY _________________________________ 5
2.1
CPU and Instruction Set ............................................................................... 5
Symbols associated with registers and memory ................................................. 5
Symbols associated with program counter ......................................................... 5
Symbols associated with flags ............................................................................. 5
Associated with immediate data .......................................................................... 5
Associated with arithmetic and other operations ............................................... 5
2.2
Program Memory (ROM) .............................................................................. 9
2.3
Data Memory (RAM) .................................................................................... 9
CHAPTER
3POWER SOURCE ___________________________________________ 15
3.1
Power Supply System ................................................................................... 15
3.2
SVD (Supply Voltage Detection) Circuit ...................................................... 16
3.2.1 Configuration of SVD circuit .................................................................... 16
3.2.2 Control of SVD circuit ............................................................................... 16
3.2.3 Programming notes ................................................................................... 17
3.3
Heavy Load Protection Mode ...................................................................... 18
3.3.1 Control of heavy load protection mode .................................................... 18
3.3.2 Programming notes ................................................................................... 18
3.4
CPU Operating Voltage Change .................................................................. 19
CHAPTER
4INITIAL RESET ____________________________________________ 20
4.1
Initial Reset Factors ..................................................................................... 20
4.1.1 External initial reset by the RESET terminal ........................................... 20
4.1.2 External initial reset by simultaneous low level input
of K00–K03 terminals ............................................................................ 21
4.1.3 Initial reset by oscillation detector ........................................................... 21
4.1.4 Initial reset by watchdog timer ................................................................. 21
4.1.5 Internal register at initial resetting ........................................................... 21
4.2
Watchdog Timer ........................................................................................... 22
4.2.1 Configuration of watchdog timer .............................................................. 22
4.2.2 Control of watchdog timer ........................................................................ 22
4.2.3 Programming notes ................................................................................... 22
CHAPTER
5OSCILLATION CIRCUIT ______________________________________ 23
5.1
Configuration of Oscillation Circuit ........................................................... 23
5.2
OSC1 Oscillation Circuit ............................................................................. 23
5.3
OSC3 Oscillation Circuit ............................................................................. 24
5.4
Operating Voltage Change ........................................................................... 25
5.5
Clock Frequency and Instruction Execution Time ....................................... 25
5.6
Control of Oscillation Circuit ...................................................................... 26
5.7
Programming Notes ..................................................................................... 28