OXCF950_06 Datasheet, PDF (3/66 Pages) Oxford Semiconductor – low cost asynchronous 16-bit PC card or Compact Flash UART device

OXFORD SEMICONDUCTOR, INC.
OXCF950 rev B DATA SHEET
CONTENTS
FEATURES ................................................................................................................................................... 1
DESCRIPTION .............................................................................................................................................. 1
SUMMARY OF DIFFERENCES BETWEEN OXCF950 AND OXCF950 REV B........................................... 2
CONTENTS................................................................................................................................................... 3
REVISION HISTORY..................................................................................................................................... 5
1 BLOCK DIAGRAM ................................................................................................................................ 6
2 PIN INFORMATION ............................................................................................................................... 7
3 PIN DESCRIPTIONS.............................................................................................................................. 8
4 CONFIGURATION & OPERATION ..................................................................................................... 11
4.1 MODE SELECTION .......................................................................................................................................................... 11
4.1.1 GENERIC MODE .......................................................................................................................................................... 11
4.1.2 16C950 MODE .............................................................................................................................................................. 11
4.1.3 NORMAL/LOCAL BUS MODES.................................................................................................................................... 11
4.2 PCMCIA/CF OPERATION ................................................................................................................................................ 11
5 PCMCIA / CF TARGET CONTROLLER .............................................................................................. 13
5.1 OPERATION ..................................................................................................................................................................... 13
5.2 CONFIGURATION SPACE (CARD INFORMATION STRUCTURE)................................................................................ 13
5.2.1 LOCAL BUS MODE SPACE MAP ................................................................................................................................ 13
5.2.2 NORMAL MODE SPACE MAP ..................................................................................................................................... 14
5.3 ACCESS TO IO FUNCTION ............................................................................................................................................. 14
5.3.1 ACCESS TO INTERNAL UART .................................................................................................................................... 14
5.3.2 ACCESS TO LOCAL BUS ............................................................................................................................................ 14
5.3.3 ACCESSING LOCAL CONFIGURATION REGISTERS ............................................................................................... 15
5.4 CF / PCMCIA INTERRUPT ............................................................................................................................................... 19
5.4.1 INTERRUPT GENERATION ......................................................................................................................................... 19
5.4.2 INTERRUPT SOURCES ............................................................................................................................................... 19
5.5 CF/PCMCIA FUNCTION CONFIGURATION REGISTERS .............................................................................................. 20
5.5.1 CONFIGURATION OPTIONS REGISTER ‘COR’ (OFFSET 0XF8).............................................................................. 20
5.5.2 CONFIGURATION STATUS REGISTER ‘CSR’ (OFFSET 0XFA)................................................................................ 21
5.5.3 PIN REPLACEMENT REGISTER ‘PRR’ (OFFSET 0XFC) ........................................................................................... 22
5.5.4 SOCKET AND COPY REGISTER ‘SCR’ (OFFSET 0XFE)........................................................................................... 23
5.6 CARD INFORMATION STRUCTURE............................................................................................................................... 23
5.6.1 LOCAL BUS MODE ...................................................................................................................................................... 23
5.6.2 NORMAL MODE ........................................................................................................................................................... 25
5.6.3 GENERIC NORMAL MODE.......................................................................................................................................... 27
6 INTERNAL 950 UART ......................................................................................................................... 30
6.1 MODE SELECTION .......................................................................................................................................................... 30
6.1.1 450 MODE..................................................................................................................................................................... 30
6.1.2 550 MODE..................................................................................................................................................................... 30
6.1.3 750 MODE..................................................................................................................................................................... 30
6.1.4 650 MODE..................................................................................................................................................................... 30
6.1.5 950 MODE..................................................................................................................................................................... 30
6.2 REGISTER DESCRIPTION TABLES ............................................................................................................................... 32
6.3 RESET CONFIGURATION ............................................................................................................................................... 35
6.3.1 HOST RESET ............................................................................................................................................................... 35
6.3.2 SOFTWARE RESET ..................................................................................................................................................... 35
DS-0027 Feb 06
External—Free Release
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