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Table of contents
3822 GROUP USER’S MANUAL
i
Description ..................................................................................................................................... 1-2
Features .......................................................................................................................................... 1-2
Applications ................................................................................................................................... 1-2
Pin configuration .......................................................................................................................... 1-3
Functional block diagram ........................................................................................................... 1-4
Pin description .............................................................................................................................. 1-5
Part numbering ............................................................................................................................. 1-7
Group expansion .......................................................................................................................... 1-8
Functional description ............................................................................................................... 1-10
CPU mode register ................................................................................................................. 1-10
I/O ports .................................................................................................................................. 1-13
Interrupts ................................................................................................................................ 1-18
Timers ..................................................................................................................................... 1-21
A-D converter ......................................................................................................................... 1-29
LCD drive control circuit ......................................................................................................... 1-30
φ clock output function ............................................................................................................1-36
Reset circuit ............................................................................................................................ 1-37
Notes on programming ........................................................................................................... 1-42
Absolute maximum ratings ..................................................................................................... 1-44
Electrical characteristics ......................................................................................................... 1-46
Timing requirements 1 ............................................................................................................ 1-49
Timing requirements 2 ............................................................................................................ 1-49
Timing diagram ....................................................................................................................... 1-51
2.1.1 I/O ports ........................................................................................................................... 2-2
2.1.2 Function pins ................................................................................................................... 2-7
2.1.3 Application examples ....................................................................................................... 2-8
2.1.4 Notes on use ................................................................................................................. 2-12
2.2 Interrupts ............................................................................................................................... 2-15
2.2.2 Control ........................................................................................................................... 2-19
2.2.3 Related registers ........................................................................................................... 2-22
2.2.4 INT interrupts ................................................................................................................. 2-28
2.2.5 Key input interrupt ......................................................................................................... 2-29
2.2.6 Notes on use ................................................................................................................. 2-31