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PC87393 Datasheet(PDF) 126 Page - National Semiconductor (TI) |
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PC87393 Datasheet(HTML) 126 Page - National Semiconductor (TI) |
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126 / 148 page  8.0 Legacy Functional Blocks (Continued) 126 www.national.com 8.3 UART FUNCTIONALITY (SP1 AND SP2) 8.3.1 General Description Both SP1 and SP2 provide UART functionality. The generic SP1 and SP2 support serial data communication with remote peripheral device or modem using a wired interface. The functional blocks can function as a standard 16450, 16550, or as an Extended UART. 8.3.2 UART Mode Register Bank Overview Four register banks, each containing eight registers, control UART operation. All registers use the same 8-byte address space to indicate offsets 00h through 07h. The BSR register selects the active bank and is common to all banks. See Figure 30. Figure 30. UART Mode Register Bank Architecture BANK 0 BANK 1 BANK 2 BANK 3 Offset 07h Offset 06h Offset 05h Offset 04h LCR/BSR Offset 02h Offset 01h Offset 00h Common Register Throughout All Banks 16550 Banks |
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