
S3C8-Series Microcontrollers....................................................................................................................... 1-1
S3C8238/C8235/F8235 Microcontroller........................................................................................................ 1-1
Features........................................................................................................................................................ 1-2
Block Diagram .............................................................................................................................................. 1-3
Pin Assignment............................................................................................................................................. 1-4
Pin Assignment............................................................................................................................................. 1-5
Pin Assignment............................................................................................................................................. 1-6
Pin Descriptions............................................................................................................................................ 1-7
Pin Circuits........................................................................................................................................... 1-9
Overview....................................................................................................................................................... 2-1
Program Memory (ROM) .............................................................................................................................. 2-2
Smart Option........................................................................................................................................ 2-3
Register Architecture .................................................................................................................................... 2-4
Register Page Pointer (PP).................................................................................................................. 2-6
Register Set 1....................................................................................................................................... 2-7
Register Set 2....................................................................................................................................... 2-7
Prime Register Space.......................................................................................................................... 2-8
Working Registers................................................................................................................................ 2-9
Using The Register Points ................................................................................................................... 2-10
Register Addressing...................................................................................................................................... 2-12
Common Working Register Area (C0H–CFH)..................................................................................... 2-14
4-Bit Working Register Addressing...................................................................................................... 2-15
8-Bit Working Register Addressing...................................................................................................... 2-17
System And User Stack................................................................................................................................ 2-19
Overview....................................................................................................................................................... 3-1
Register Addressing Mode (R)...................................................................................................................... 3-2
Indirect Register Addressing Mode (IR)........................................................................................................ 3-3
Indexed Addressing Mode (X) ...................................................................................................................... 3-7
Direct Address Mode (DA)............................................................................................................................ 3-10
Indirect Address Mode (IA)........................................................................................................................... 3-12
Relative Address Mode (RA) ........................................................................................................................ 3-13
Immediate Mode (IM)........................................................................................................................... 3-14