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DM505 Datasheet(PDF) 147 Page - Texas Instruments |
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DM505 Datasheet(HTML) 147 Page - Texas Instruments |
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147 / 295 page ![]() 3 2 Start Bit Data Bits UARTi_TXD 5 Data Bits Bit Start 4 UARTi_RXD SPRS91v_UART_01 147 DM505 www.ti.com SPRS976E – NOVEMBER 2016 – REVISED MAY 2018 Submit Documentation Feedback Specifications Copyright © 2016–2018, 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 5-44. 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 5-40. 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 5-45. In Table 5-45 are presented the specific groupings of signals (IOSET) for use with UART. Table 5-45. UART1-3 IOSETs SIGNALS IOSET1 IOSET2 IOSET3 BALL MUX BALL MUX BALL MUX UART1 uart1_rxd F13 0 F13 0 uart1_txd E14 0 E14 0 uart1_rtsn C14 0 uart1_ctsn F14 0 UART2 uart2_rxd E7 2 D14 0 uart2_txd F7 2 D15 0 uart2_rtsn F16 0 uart2_ctsn F15 0 UART3 uart3_rxd W7 4 L1 1 M2 1 uart3_txd W6 4 L2 1 R6 1 uart3_rtsn R7 1 T5 1 |
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