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AM652X 数据表(PDF) 237 Page - Texas Instruments |
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AM652X 数据表(HTML) 237 Page - Texas Instruments |
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237 / 277 page  T1 T2 TIMIx TIMER_01 T3 T4 TIMOx 237 AM6548, AM6528, AM6546 AM6526, AM6527 www.ti.com SPRSP08I – NOVEMBER 2017 – REVISED DECEMBER 2019 Submit Documentation Feedback Product Folder Links: AM6548 AM6528 AM6546 AM6526 AM6527 Specifications Copyright © 2017–2019, Texas Instruments Incorporated (1) P = functional clock period in ns. Table 5-117. Switching Characteristics for Timers NO. PARAMETER DESCRIPTION MODE MIN MAX UNIT T3 tw(TOUTH) Pulse duration, high PWM -3 + 4P(1) ns T4 tw(TOUTL) Pulse duration, low PWM -3 + 4P(1) ns (1) P = functional clock period in ns. Figure 5-121. Timer Timing For more information, see section Timers in the device TRM. 5.9.5.23 UART For more details about features and additional description information on the device Universal Asynchronous Receiver Transmitter, see the corresponding sections within Section 4.3, Signal Descriptions and Section 6, Detailed Description. Table 5-118, Table 5-119, and Figure 5-122 present Timing Requirements and Switching Characteristics for UART interface. Table 5-118. Timing Requirements for UART NO. PARAMETER DESCRIPTION MODE MIN MAX UNIT 4 tw(RX) Pulse width, receive data bit, 15/30 pF high or low 0.95U (1) 1.05U (1) ns 5 tw(CTS) Pulse width, receive start bit, 15/30 pF high or low 0.95U (1) 1.05U (1) ns td(RTS-TX) Delay time, transmit start bit to transmit data P (2) ns td(CTS-TX) Delay time, receive start bit to transmit data P (2) ns (1) U = UART baud time = 1/Programmed baud rate (2) P = Clock period of the reference clock (FCLK, usually 48 MHz or 192 MHz) Table 5-119. Switching Characteristics Over Recommended Operating Conditions for UART NO. PARAMETER DESCRIPTION MODE MIN MAX UNIT f(baud) Maximum programmable baud rate 15 pF 12 MHz 30 pF 0.115 2 tw(TX) Pulse width, transmit data bit, 15/30 pF high or low U - 2 (1) U + 2 (1) ns 3 tw(RTS) Pulse width, transmit start bit, 15/30 pF high or low U - 2 (1) U + 2 (1) ns |
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