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PC87393F Datasheet(PDF) 9 Page - National Semiconductor (TI) |
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PC87393F Datasheet(HTML) 9 Page - National Semiconductor (TI) |
9 / 148 page Table of Contents (Continued) 9 www.national.com 6.3.5 MIDI Command Register (MCOM) ............................................................................ 103 6.3.6 MIDI Control Register (MCNTL) ................................................................................ 104 6.4 MIDI PORT BITMAP ................................................................................................................ 105 7.0 X-Bus Extension 7.1 OVERVIEW ............................................................................................................................. 106 7.2 IRQ ROUTING ......................................................................................................................... 106 7.3 X-BUS TRANSACTIONS ......................................................................................................... 106 7.3.1 Programmable I/O Range Chip Select ...................................................................... 107 7.3.2 LPC and FWH Address to X-Bus Address Translation ............................................. 107 7.3.3 Extended Read/Write Signal Mode ........................................................................... 108 7.3.4 Indirect Memory Read and Write Transaction ........................................................... 108 7.3.5 Normal Address Mode X-Bus Transactions .............................................................. 108 7.3.6 Latched Address Mode X-Bus Transactions ............................................................. 110 7.4 X-BUS CONFIGURATION REGISTERS ................................................................................. 112 7.4.1 X-Bus Register Map .................................................................................................. 112 7.4.2 X-Bus Configuration Register (XBCNF) .................................................................... 112 7.4.3 X-Bus Select 0 Configuration Register (XZCNF0) ..................................................... 114 7.4.4 X-Bus Select 1 Configuration Register (XZCNF1) ..................................................... 115 7.4.5 X-Bus PIRQx Input Registers (XIRQCA to XIRQCD) ................................................ 116 7.4.6 X-Bus Indirect Memory Address Register 0 (XIMA0) ................................................ 117 7.4.7 X-Bus Indirect Memory Address Register 1 (XIMA1) ................................................ 117 7.4.8 X-Bus Indirect Memory Address Register 2 (XIMA2) ................................................ 118 7.4.9 X-Bus Indirect Memory Address Register 3 (XIMA3) ................................................ 118 7.4.10 X-Bus Indirect Memory Data Register (XIMD) ........................................................... 118 7.5 USAGE HINTS ....................................................................................................................... 118 7.6 X-BUS EXTENSION BITMAP .................................................................................................. 120 8.0 Legacy Functional Blocks 8.1 FLOPPY DISK CONTROLLER (FDC) ..................................................................................... 121 8.1.1 General Description ................................................................................................... 121 8.1.2 FDC Register Map ..................................................................................................... 121 8.1.3 FDC Bitmap Summary ............................................................................................... 122 8.2 PARALLEL PORT .................................................................................................................... 123 8.2.1 General Description ................................................................................................... 123 8.2.2 Parallel Port Register Map ......................................................................................... 123 8.2.3 Parallel Port Bitmap Summary .................................................................................. 124 8.3 UART FUNCTIONALITY (SP1 AND SP2) ............................................................................... 126 8.3.1 General Description ................................................................................................... 126 8.3.2 UART Mode Register Bank Overview ....................................................................... 126 8.3.3 SP1 and SP2 Register Maps for UART Functionality ................................................ 127 8.3.4 SP1 and SP2 Bitmap Summary for UART Functionality ........................................... 129 8.4 IR FUNCTIONALITY (SP2) ..................................................................................................... 131 8.4.1 General Description ................................................................................................... 131 |
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