
i
3850 Group (Spec. H) User’s Manual
Table of contents
DESCRIPTION ................................................................................................................................ 1-2
 APPLICATION ................................................................................................................................ 1-2
 PIN CONFIGURATION .................................................................................................................. 1-2
 FUNCTIONAL BLOCK .................................................................................................................. 1-3
 PIN DESCRIPTION ........................................................................................................................ 1-4
 GROUP EXPANSION .................................................................................................................... 1-6
 Memory Type ............................................................................................................................ 1-6
 Memory Size ............................................................................................................................. 1-6
 Packages ................................................................................................................................... 1-6
 FUNCTIONAL DESCRIPTION ...................................................................................................... 1-8
 Memory .................................................................................................................................... 1-12
 I/O Ports .................................................................................................................................. 1-14
 Interrupts ................................................................................................................................. 1-18
 Timers ...................................................................................................................................... 1-21
 Serial I/O ................................................................................................................................. 1-23
 A-D Converter ......................................................................................................................... 1-32
 Watchdog Timer ..................................................................................................................... 1-33
 Reset Circuit ........................................................................................................................... 1-34
 Clock Generating Circuit ....................................................................................................... 1-36
 ROM PROGRAMMING METHOD .............................................................................................. 1-74
 2.1.1 Memory map ................................................................................................................... 2-2
 2.1.2 Relevant registers .......................................................................................................... 2-2
 2.1.4 Notes on I/O port ........................................................................................................... 2-4
 2.2 Interrupt ................................................................................................................................... 2-6
 2.2.1 Memory map ................................................................................................................... 2-6
 2.2.2 Relevant registers .......................................................................................................... 2-7
 2.2.3 Interrupt source ............................................................................................................ 2-10
 2.2.5 Interrupt control ............................................................................................................ 2-14
 2.2.6 INT interrupt .................................................................................................................. 2-17
 2.2.7 Notes on interrupts ...................................................................................................... 2-18