IA8044/IA8344
Data Sheet
SDLC Communications Controller
March 30, 2010
LIST OF TABLES
Table 1. IA8044 and IA8344 40-Lead PDIP Pin Listing..............................................................12
Table 2. IA8044 and IA8344 44-Pin PLCC Pin Listing...............................................................15
Table 3. IA8044 and IA8344 Absolute Maximum Ratings..........................................................17
Table 4. IA8044 and IA8344 DC Characteristics.........................................................................17
Table 5. Input/Output Characteristics of IC Signals.....................................................................19
Table 6. Reset Vectors ..................................................................................................................20
Table 7. SFR Bit Addressable Locations......................................................................................22
Table 8. Internal RAM Bit Addressable Locations ......................................................................22
Table 9. Special Function Registers..............................................................................................23
Table 10. Additional Functions of Port P3 ...................................................................................24
Table 11. Port 0 Register ..............................................................................................................25
Table 12. Port 1 Register ..............................................................................................................25
Table 13. Port 2 Register ..............................................................................................................25
Table 14. Port 3 Register ..............................................................................................................26
Table 15. Timer Mode Register....................................................................................................27
Table 16. Timer Mode Select Bits ................................................................................................28
Table 17. Timer Control Register .................................................................................................28
Table 18. Timer 0 High Byte Register..........................................................................................29
Table 19. Timer 0 Low Byte Register ..........................................................................................29
Table 20. Timer 1 High Byte Register..........................................................................................29
Table 21. Timer 1 Low Byte Register ..........................................................................................29
Table 22. Accumulator Register ...................................................................................................32
Table 23. B Register .....................................................................................................................32
Table 24. Program Status Word Register .....................................................................................32
Table 25. RS1/RS0 Bank Selections by State...............................................................................33
Table 26. Stack Pointer.................................................................................................................33
Table 27. Data Pointer (High) Register ........................................................................................33
Table 28. Data Pointer (Low) Register.........................................................................................33
Table 29. Interrupt Priority Register.............................................................................................35
Table 30. Interrupt Enable Register..............................................................................................36
Table 31. Serial Mode Register ....................................................................................................37
Table 32. Serial Mode Select Clock Mode Bits............................................................................38
Table 33. Status/Command Register.............................................................................................38
Table 34. Send/Receive Count Register .......................................................................................39
Table 35. Station Address Register...............................................................................................40
Table 36. Transmit Buffer Start Address Register........................................................................40
Table 37. Transmit Buffer Length Register..................................................................................40
Table 38. Transmit Control Byte Register....................................................................................41
Table 39. Receive Buffer Start Address Register .........................................................................41
Table 40. Receive Buffer Length Register ...................................................................................41
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