Epson S1C63558 4.6 I/O Ports (P00–P03, P10–P13, P20–P23and P30–P33), 4.7 LCD Driver (COM0–COM16, SEG0–SEG39), Clock Timer, Stopwatch Timer, 4.10 Programmable Timer

CONTENTS

	4.5.3 High impedance control ............................................................................	34
	4.5.4 Special output ............................................................................................	34
	4.5.5 I/O memory of output ports .......................................................................	37
	4.5.6 Programming notes ...................................................................................	40
4.6 I/O Ports (P00–P03, P10–P13, P20–P23 and P30–P33) ..........................		41
	4.6.1 Configuration of I/O ports ........................................................................	41
	4.6.2 Mask option ...............................................................................................	42
	4.6.3 I/O control registers and input/output mode ............................................	42
	4.6.4 Pull-up during input mode ........................................................................	42
	4.6.5 Special outputs (CL, FR) ...........................................................................	43
	4.6.6 I/O memory of I/O ports ............................................................................	44
	4.6.7 Programming notes ...................................................................................	48
4.7 LCD Driver (COM0–COM16, SEG0–SEG39) ...........................................		49
	4.7.1 Configuration of LCD driver ....................................................................	49
	4.7.2 Mask option ...............................................................................................	49
	4.7.3 Power supply for LCD driving ..................................................................	49
	4.7.4 LCD display control (ON/OFF) and switching of duty ............................	49
	4.7.5 Display memory .........................................................................................	51
	4.7.6 LCD contrast adjustment ..........................................................................	53
	4.7.7 I/O memory of LCD driver ........................................................................	54
	4.7.8 Programming notes ...................................................................................	56
4.8	Clock Timer ..................................................................................................	57
	4.8.1 Configuration of clock timer .....................................................................	57
	4.8.2 Data reading and hold function ................................................................	57
	4.8.3 Interrupt function ......................................................................................	58
	4.8.4 I/O memory of clock timer ........................................................................	59
	4.8.5 Programming notes ...................................................................................	60
4.9	Stopwatch Timer ..........................................................................................	61
	4.9.1 Configuration of stopwatch timer .............................................................	61
	4.9.2 Count-up pattern .......................................................................................	61
	4.9.3 Interrupt function ......................................................................................	62
	4.9.4 I/O memory of stopwatch timer ................................................................	63
	4.9.5 Programming notes ...................................................................................	64
4.10 Programmable Timer ...................................................................................		65
	4.10.1 Configuration of programmable timer ...................................................	65
	4.10.2 Setting of initial value and counting down .............................................	66
	4.10.3 Counter mode ..........................................................................................	67
	4.10.4 Setting of input clock in timer mode .......................................................	68
	4.10.5 Interrupt function ....................................................................................	69
	4.10.6 Setting of TOUT output ...........................................................................	69
	4.10.7 Transfer rate setting for serial interface ................................................	70
	4.10.8 I/O memory of programmable timer .......................................................	71
	4.10.9 Programming notes .................................................................................	76
4.11	Serial Interface ............................................................................................	77
	4.11.1 Configuration of serial interface ............................................................	77
	4.11.2 Mask option .............................................................................................	78
	4.11.3 Transfer modes ........................................................................................	78
	4.11.4 Clock source ............................................................................................	80
	4.11.5 Transmit-receive control .........................................................................	81
	4.11.6 Operation of clock synchronous transfer ................................................	82
	4.11.7 Operation of asynchronous transfer .......................................................	86
	4.11.8 Interrupt function ....................................................................................	90
	4.11.9 I/O memory of serial interface ................................................................	92
	4.11.10 Programming notes ...............................................................................	99
4.12 Sound Generator .........................................................................................		100
	4.12.1 Configuration of sound generator .........................................................	100
	4.12.2 Buzzer output circuit ..............................................................................	100

ii EPSON S1C63558 TECHNICAL MANUAL