OB38R08A1 8KB ISP 512B RAM 8 .............................................................................................................................................................................. 3 ..................................................................................................................................................................................... 3 .............................................................................................................................................................................. 3 ..................................................................................................................................................................................... 3 ................................................................................................................................................................... 4 .......................................................................................................................................................................... 7 .............................................................................................................................................................................. 8 (SFR) ......................................................................................................................................................... 9 ............................................................................................................................................................................ 13 1. ....................................................................................................................................................................... 13 1.1 ............................................................................................................................................ 13 1.2 IO ................................................................................................................................................................ 13 1.3 ............................................................................................................................................ 13 1.4 ................................................................................................................................................... 14 1.5 ................................................................................................................................................................. 14 1.5.1 .......................................................................................................................................... 14 1.5.2 .......................................................................................................................................... 14 1.5.3 Reset status ................................................................................................................................................ 15 1.5.4 Time Access Key register (TAKEY) ............................................................................................................. 15 1.5.5 (SWRES) ....................................................................................................................... 15 1.5.6 Example of software reset........................................................................................................................... 16 1.6 .............................................................................................................................................................. 16 2. ................................................................................................................................................................... 17 3. ............................................................................................................................................................... 21 3.1 ....................................................................................................................................................... 21 3.2 ....................................................................................................................................................... 22 3.3 - 128 (00h 7Fh) .................................................................................................................. 22 3.4 - 128 (80h FFh)............................................................................................................... 22 3.5 - 256 ( 00 FF) .............................................................................................................. 22 4. CPU .................................................................................................................................................................. 23 4.1 .............................................................................................................................................................. 23 4.2 B .......................................................................................................................................................... 23 4.3 ....................................................................................................................................................... 24 4.4 .......................................................................................................................................................... 24 4.5 .......................................................................................................................................................... 24 4.6 1 ....................................................................................................................................................... 25 4.7 ............................................................................................................................................... 25 4.8 ............................................................................................................................................... 26 5. GPIO ......................................................................................................................................................... 27 5.1 ....................................................................................................................................................... 27 5.2 ................................................................................................................................................... 28 6. 0 1 ................................................................................................................................................. 29 6.1 / (TMOD)............................................................................................................ 29 6.2 / (TCON) ................................................................................................................... 30 6.3 ............................................................................................................................. 30 6.4 0 (13 / ) ................................................................................................................................... 31 6.5 1 (16 /) ................................................................................................................................... 31 6.6 2 (8 / ) ....................................................................................................................... 33 6.7 3 ( 8 / ( 0)) .................................................................................................. 33 7. 2 / ..................................................................................................................................... 34 On-Bright Electronics Confidential Datasheet OB DOC DS OB38R08A1 C - 1 - OB38R08A1 8KB ISP 512B RAM 8 7.1 2 ................................................................................................................................................... 36 7.1.1 .............................................................................................................................................. 36 7.1.2 ................................................................................................................................... 37 7.1.3 ............................................................................................................................... 37 7.1.4 2 ....................................................................................................................................... 38 7.2 .......................................................................................................................................................... 38 7.2.1 0 ............................................................................................................................................... 38 7.2.2 1 ............................................................................................................................................... 39 7.3 .......................................................................................................................................................... 40 7.3.1 0 ............................................................................................................................................... 40 7.3.2 1 ............................................................................................................................................... 40 8. ................................................................................................................................................................... 41 8.1 4 .................................................................................................................. 42 8.1.1 0 ...................................................................................................................................................... 42 8.1.2 1 ...................................................................................................................................................... 43 8.1.3 2 ...................................................................................................................................................... 43 8.1.4 3 ...................................................................................................................................................... 43 8.2 .................................................................................................................................... 44 8.3 ........................................................................................................................................ 44 8.4 ................................................................................................................................................... 44 8.4.1 1 3 ............................................................................................................................ 44 9. ............................................................................................................................................................ 46 10. ...................................................................................................................................................................... 50 10.1 ....................................................................................................................................................... 54 11. ....................................................................................................................................................... 56 11.1 ( ) ......................................................................................................................................... 56 11.2 .......................................................................................................................................................... 56 12. (PWM) ................................................................................................................................................ 57 13. IIC ................................................................................................................................................................ 60 14. SPI ............................................................................................................................................................... 65 15. KBI ...................................................................................................................................................... 70 16. LVI ............................................................................................................................................... 73 17. 12 (ADC) ................................................................................................................................. 75 18. (INTERNAL ISP) ................................................................................................................................ 81 18.1 ISP ................................................................................................................................................... 81 18.2 (N) ......................................................................................................................................................... 81 18.3 ISP ........................................................................................................................................ 82 18.4 ISP ........................................................................................................................................... 82 18.5 ISP TAKEY, IFCON, ISPFAH, ISPFAL, ISPFD and ISPFC ............................................................... 83 19. (COMPARATOR) ...................................................................................................................................... 88 ............................................................................................................................................................................ 91 DC ...................................................................................................................................................................... 91 LVI& LVR ........................................................................................................................................................... 92 ADC ................................................................................................................................................................... 92 COMPARATOR ................................................................................................................................................. 92 On-Bright Electronics Confidential Datasheet OB DOC DS OB38R08A1 C - 2 -