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DM504 Datasheet(PDF) 108 Page - Texas Instruments |
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DM504 Datasheet(HTML) 108 Page - Texas Instruments |
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108 / 211 page ![]() 3 2 Start Bit Data Bits UARTi_TXD 5 Data Bits Bit Start 4 UARTi_RXD SPRS91v_UART_01 108 DM504 SPRS977A – NOVEMBER 2016 – REVISED JANUARY 2017 www.ti.com Submit Documentation Feedback Specifications Copyright © 2016–2017, Texas Instruments Incorporated (1) U = UART baud time = 1/programmed baud rate (2) P = Clock period of the reference clock (FCLK, usually 48 MHz or 192MHz). Table 5-38. Switching Characteristics Over Recommended Operating Conditions for UART NO. PARAMETER DESCRIPTION MIN MAX UNIT f(baud) Maximum programmable baud rate 15 pF 12 MHz 30 pF 0.23 100 pF 0.115 2 tw(TX) Pulse width, transmit data bit, 15/30/100 pF high or low U - 2(1) U + 2(1) ns 3 tw(RTS) Pulse width, transmit start bit, 15/30/100 pF high or low U - 2(1) U + 2(1) ns (1) U = UART baud time = 1/programmed baud rate Figure 5-18. UART Timing CAUTION The IO timings provided in this section are only valid if signals within a single IOSET are used. The IOSETs are defined in Table 5-39. In Table 5-39 are presented the specific groupings of signals (IOSET) for use with UART. Table 5-39. UART1-3 IOSETs SIGNALS IOSET1 IOSET2 IOSET3 BALL MUX BALL MUX BALL MUX UART1 uart1_rxd B4 0 B4 0 uart1_txd D6 0 D6 0 uart1_rtsn D7 0 uart1_ctsn C5 0 UART2 uart2_rxd E6 2 E6 0 uart2_txd C8 2 C8 0 uart2_rtsn C9 0 uart2_ctsn C6 0 UART3 uart3_rxd T2 4 M2 1 P2 1 uart3_txd T3 4 L3 1 N3 1 uart3_rtsn L2 1 N1 1 |
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