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TL16C752CPFB データシート(PDF) 11 Page - Texas Instruments |
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TL16C752CPFB データシート(HTML) 11 Page - Texas Instruments |
11 / 52 page TL16C752C www.ti.com .................................................................................................................................................... SLLS646A – MARCH 2008 – REVISED AUGUST 2009 Table 2. Register Reset Functions(1) RESET REGISTER RESET STATE CONTROL Interrupt enable register RESET All bits cleared Interrupt identification register RESET Bit 0 is set. All other bits cleared. FIFO control register RESET All bits cleared Line control register RESET Reset to 00011101 (1D hex). Modem control register RESET All bits cleared Line status register RESET Bits 5 and 6 set. All other bits cleared. Modem status register RESET Bits 0–3 cleared. Bits 4–7 input signals. Enhanced feature register RESET All bits cleared Receiver holding register RESET Pointer logic cleared Transmitter holding register RESET Pointer logic cleared Transmission control register RESET All bits cleared Trigger level register RESET All bits cleared Alternate function register RESET All bits (except AFR4) cleared; AFR4 set (1) Registers DLL, DLH, SPR, Xon1, Xon2, Xoff1, Xoff2 are not reset by the top-level reset signal RESET, i.e., they hold their initialization values during reset. Table 3 summarizes the state of outputs after reset. Table 3. Signal Reset Functions SIGNAL RESET CONTROL RESET STATE TX RESET High RTS RESET High DTR RESET High RXRDYA–B RESET High TXRDYA–B RESET Low Interrupts The TL16C752C UART has interrupt generation and prioritization (six prioritized levels of interrupts) capability. The interrupt enable register (IER) enables each of the six types of interrupts and the INT signal in response to an interrupt generation. The IER also can disable the interrupt system by clearing bits 0 −3, 5−7. When an interrupt is generated, the interrupt identification register(IIR) indicates that an interrupt is pending and provides the type of interrupt through IIR[5 −0]. Table 4 summarizes the interrupt control functions. Copyright © 2008–2009, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Link(s): TL16C752C |
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