
I-ii
EPSON
S1C62440/624A0/624C0/62480 TECHNICAL HARDWARE
CONTENTS
4.2
Initial Reset .................................................................... I-38
External initial reset by the RESET terminal ........... I-39
External initial reset by simultaneous L level
input of K00–K03 terminals (mask option) .............. I-39
Initial reset by oscillation detector ........................... I-39
Initial reset by watchdog timer ................................ I-39
Internal register at initial resetting .......................... I-40
CHAPTER 5
OSCILLATION CIRCUIT ................................................... I-41
5.1
OSC1 Oscillation Circuit ................................................ I-41
5.2
OSC3 Oscillation Circuit ................................................ I-43
5.3
Operating Voltage Change ............................................ I-45
5.4
Clock Frequency and Instruction Execution Time ......... I-46
5.5
Control of Oscillation Circuit .......................................... I-47
5.6
Programming Notes....................................................... I-50
CHAPTER 6
INPUT PORTS (Kxx) ......................................................... I-51
6.1
Configuration of Input Ports ........................................... I-51
6.2
Mask Option .................................................................. I-52
6.3
Interrupt Function .......................................................... I-53
Input interrupt (K00–K03) and
input relation registers ........................................... I-53
Input interrupt (K10–K13) ....................................... I-55
6.4
Control of Input Ports..................................................... I-57
6.5
Programming Notes....................................................... I-60