Table Of Contents - Epson 0C88832 Technical Manual

1 INTRODUCTION .............................................................................................. 1
1.1 Configuration ..................................................................................................................... 1
1.2 Features .............................................................................................................................2
1.3 Block Diagram ...................................................................................................................3
1.4 Pin Layout Diagram .......................................................................................................... 4
1.5 Mask Option .......................................................................................................................8
2 POWER SUPPLY .............................................................................................. 11
2.1 Operating Voltage .............................................................................................................11
2.2 Internal Power Supply Circuit ..........................................................................................11
2.3 Heavy Load Protection Mode ...........................................................................................12
3 CPU AND MEMORY CONFIGURATION ..................................................... 13
3.1 CPU ..................................................................................................................................13
3.2 Internal Memory ............................................................................................................... 13
3.2.1 ROM ........................................................................................................................................ 13
3.2.2 RAM ......................................................................................................................................... 13
3.2.3 I/O memory .............................................................................................................................. 13
3.2.4 Display memory ....................................................................................................................... 13
3.3 Exception Processing Vectors ..........................................................................................13
3.4 CC (Customized Condition Flag) .....................................................................................14
4 INITIAL RESET ............................................................................................... 15
4.1 Initial Reset Factors ..........................................................................................................15
4.1.1 RESET terminal ....................................................................................................................... 15
4.1.2 Simultaneous LOW level input at input port terminals K00-K03 ........................................... 15
4.1.3 Supply voltage detection (SVD) circuit ................................................................................... 16
4.1.4 Initial reset sequence ............................................................................................................... 16
4.2 Initial Settings After Initial Reset ...................................................................................... 17
5 PERIPHERAL CIRCUITS AND THEIR OPERATION ................................ 18
5.1 I/O Memory Map .............................................................................................................. 18
5.2 Watchdog Timer ................................................................................................................27
5.2.1 Configuration of watchdog timer ............................................................................................ 27
5.2.2 Interrupt function .................................................................................................................... 27
5.2.3 Control of watchdog timer ...................................................................................................... 27
5.2.4 Programming notes ................................................................................................................. 27
5.3 Oscillation Circuits and Operating Mode ........................................................................28
5.3.1 Configuration of oscillation circuits ....................................................................................... 28
5.3.2 Mask option ............................................................................................................................. 28
5.3.3 OSC1 oscillation circuit .......................................................................................................... 28
5.3.4 OSC3 oscillation circuit .......................................................................................................... 29
5.3.5 Operating mode ....................................................................................................................... 29
5.3.6 Switching the CPU clocks ....................................................................................................... 30
5.3.7 Control of oscillation circuit and operating mode .................................................................. 31
5.3.8 Programming notes ................................................................................................................. 32
5.4 Input Ports (K ports) ......................................................................................................... 33
5.4.1 Configuration of input ports .................................................................................................... 33
5.4.2 Mask option ............................................................................................................................. 33
5.4.3 Interrupt function and input comparison register ................................................................... 34
E0C88832/88862 TECHNICAL MANUAL
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