Epson S1C88650 Technical Manual page 6

CONTENTS
5.3 Watchdog Timer ................................................................................................................39
5.3.1 Configuration of watchdog timer ............................................................................................ 39
5.3.2 Interrupt function .................................................................................................................... 39
5.3.3 Control of watchdog timer ...................................................................................................... 40
5.3.4 Programming notes ................................................................................................................. 40
5.4 Oscillation Circuits ...........................................................................................................41
5.4.1 Configuration of oscillation circuits ....................................................................................... 41
5.4.2 Mask option ............................................................................................................................. 41
5.4.3 OSC1 oscillation circuit .......................................................................................................... 41
5.4.4 OSC3 oscillation circuit .......................................................................................................... 42
5.4.5 Switching the CPU clocks ....................................................................................................... 42
5.4.6 Control of oscillation circuit ................................................................................................... 43
5.4.7 Programming notes ................................................................................................................. 43
5.5 Input Ports (K ports) .........................................................................................................44
5.5.1 Configuration of input ports .................................................................................................... 44
5.5.2 Mask option ............................................................................................................................. 44
5.5.3 Pull-up control ........................................................................................................................ 45
5.5.4 Interrupt function and input comparison register ................................................................... 45
5.5.5 Control of input ports .............................................................................................................. 47
5.5.6 Programming notes ................................................................................................................. 50
5.6 Output Ports (R ports) ......................................................................................................51
5.6.1 Configuration of output ports .................................................................................................. 51
5.6.2 High impedance control .......................................................................................................... 51
5.6.3 DC output ................................................................................................................................ 51
5.6.4 Control of output ports ............................................................................................................ 52
5.7 I/O Ports (P ports) ............................................................................................................54
5.7.1 Configuration of I/O ports ....................................................................................................... 54
5.7.2 Mask option ............................................................................................................................. 54
5.7.3 I/O control registers and I/O mode ......................................................................................... 54
5.7.4 Pull-up control ........................................................................................................................ 55
5.7.5 Special output .......................................................................................................................... 55
5.7.6 Control of I/O ports ................................................................................................................. 57
5.7.7 Programming notes ................................................................................................................. 60
5.8 Serial Interface .................................................................................................................61
5.8.1 Configuration of serial interface ............................................................................................. 61
5.8.2 Switching of terminal functions ............................................................................................... 61
5.8.3 Transfer modes ........................................................................................................................ 62
5.8.4 Clock source ............................................................................................................................ 63
5.8.5 Transmit-receive control ......................................................................................................... 64
5.8.6 Operation of clock synchronous transfer ................................................................................ 65
5.8.7 Operation of asynchronous transfer ....................................................................................... 69
5.8.8 Interrupt function .................................................................................................................... 73
5.8.9 Control of serial interface ....................................................................................................... 75
5.8.10 Programming notes ............................................................................................................... 80
5.9 Clock Timer .......................................................................................................................81
5.9.1 Configuration of clock timer ................................................................................................... 81
5.9.2 Interrupt function .................................................................................................................... 81
5.9.3 Control of clock timer ............................................................................................................. 83
5.9.4 Programming notes ................................................................................................................. 85
5.10 Programmable Timer ........................................................................................................86
5.10.1 Configuration of programmable timer .................................................................................. 86
5.10.2 Operation mode ..................................................................................................................... 87
5.10.3 Setting of input clock ............................................................................................................. 89
5.10.4 Operation and control of timer ............................................................................................. 89
5.10.5 Interrupt function .................................................................................................................. 91
5.10.6 Setting of TOUT output ......................................................................................................... 93
5.10.7 Transfer rate setting of serial interface ................................................................................. 94
ii
EPSON
S1C88650 TECHNICAL MANUAL