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TL16C752CRHBR Datasheet(PDF) 29 Page - Texas Instruments |
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TL16C752CRHBR Datasheet(HTML) 29 Page - Texas Instruments |
29 / 48 page www.ti.com PRINCIPLES OF OPERATION Register Map TL16C752C DUAL UART WITH 64-BYTE FIFO SLLS646 – MARCH 2008 Each register is selected using address lines A[0], A[1], A[2] and, in some cases, bits from other registers. The programming combinations for register selection are shown in Table 7. Table 7. Register Map – Read/Write Properties(1) A[2] A[1] A[0] READ MODE WRITE MODE 0 0 0 Receive holding register (RHR) Transmit holding register (THR) 0 0 1 Interrupt enable register (IER) Interrupt enable register 0 1 0 Interrupt identification register (IIR) FIFO control register (FCR) 0 1 1 Line control register (LCR) Line control register 1 0 0 Modem control register (MCR) Modem control register 1 0 1 Line status register (LSR) 1 1 0 Modem status register (MSR) 1 1 1 Scratch register (SPR) Scratch register (SPR) 0 0 0 Divisor latch LSB (DLL) Divisor latch LSB (DLL) 0 0 1 Divisor latch MSB (DLH) Divisor latch MSB (DLH) 1 0 0 Alternate function register (AFR) Alternate function register (AFR) 0 1 0 Enhanced feature register (EFR) Enhanced feature register 1 0 0 Xon-1 word Xon-1 word 1 0 1 Xon-2 word Xon-2 word 1 1 0 Xoff-1 word Xoff-1 word 1 1 1 Xoff-2 word Xoff-2 word 1 1 0 Transmission control register (TCR) Transmission control register 1 1 1 Trigger level register (TLR) Trigger level register 1 1 1 FIFO ready register (1) DLL and DLH are accessible only when LCR bit 7 is 1, and AFR is only accessible when LCR[7:5] = 100. Enhanced feature register, Xon1, 2 and Xoff1, 2 are accessible only when LCR is set to 10111111 (8hBF). Transmission control register and trigger level register are accessible only when EFR[4] = 1 and MCR[6] = 1, i.e. EFR[4] and MCR[6] are read/write enables. FCR FIFORdy register is accessible when any CS A–D = 0, MCR[2] = 1 and loopback MCR [4] = 0 is disabled. MCR[7] can only be modified when EFR[4] is set. Table 8 lists and describes the TL16C752C internal registers. Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 29 Product Folder Link(s): TL16C752C |
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