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ii EPSON S1C63558 TECHNICAL MANUAL
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