
I-ii
EPSON
S1C6S3N7 TECHNICAL HARDWARE
CONTENTS
CHAPTER 4
PERIPHERAL CIRCUITS AND OPERATION ...................... I-15
4.1
Memory Map .................................................................. I-15
4.2
Oscillation Circuit ............................................................ I-21
Crystal oscillation circuit ......................................... I-21
CR oscillation circuit ............................................... I-22
4.3
Input Ports (K00–K03) .................................................... I-23
Configuration of input port ...................................... I-23
Interrupt function ................................................... I-23
Mask option ............................................................ I-25
Control of input port ............................................... I-26
4.4
Output Ports (R00–R03) ................................................. I-28
Configuration of output port .................................... I-28
Mask option ............................................................ I-29
Control of output port ............................................. I-31
4.5
I/O Ports (P00–P03) ....................................................... I-34
Configuration of I/O port ........................................ I-34
I/O control register and I/O mode ........................... I-35
Mask option ............................................................ I-35
Control of I/O port .................................................. I-36
4.6
LCD Driver (COM0–COM3, SEG0–SEG25) .................. I-38
Configuration of LCD driver ..................................... I-38
Cadence adjustment of oscillation frequency ........... I-44
Mask option (segment allocation) ............................. I-45
Control of LCD driver .............................................. I-47
4.7
Clock Timer .................................................................... I-48
Configuration of clock timer .................................... I-48
Interrupt function ................................................... I-49
Control of clock timer .............................................. I-50