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TMS320DM355CZCEA13 bảng dữ liệu(PDF) 108 Page - Texas Instruments |
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TMS320DM355CZCEA13 bảng dữ liệu(HTML) 108 Page - Texas Instruments |
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108 / 163 page ![]() MXI/CLKIN 2 3 4 4 5 1 MXI/CLKIN 2 3 4 4 5 1 TMS320DM355 SPRS463G – SEPTEMBER 2007 – REVISED JUNE 2010 www.ti.com 5.5.3 Clock PLL Electrical Data/Timing (Input and Output Clocks) Table 5-5. Timing Requirements for MXI1/CLKIN1(1) (2) (see Figure 5-7) DM355 NO. PARAMETER UNIT MIN TYP MAX 1 tc(MXI1) Cycle time, MXI1/CLKIN1 27.7 (3) 41.6 (3) ns 2 tw(MXI1H) Pulse duration, MXI1/CLKIN1 high 0.45C 0.55C ns 3 tw(MXI1L) Pulse duration, MXI1/CLKIN1 low 0.45C 0.55C ns 0.25C or 4 tt(MXI1) Transition time, MXI1/CLKIN1 ns 10(4) 5 tJ(MXI1) Period jitter, MXI1/CLKIN1 0.02C ns (1) The reference points for the rise and fall transitions are measured at VIL MAX and VIH MIN. (2) C = MXI1/CLKIN1 cycle time in ns. For example, when MXI1/CLKIN1 frequency is 24 MHz use C = 41.6 ns. (3) tc(MXI1) = 41.6 ns and tc(MXI1) = 27.7 ns are the only supported cycle times for MXI1/CLKIN1. (4) Whichever is smaller. C = the period of the applied signal. Maintaining transition times as fast as possible is recommended to improve noise immunity on input signals. Figure 5-7. MXI1/CLKIN1 Timing Table 5-6. Timing Requirements for MXI2/CLKIN2(1) (2) (see Figure 5-7) DM355 NO. PARAMETER UNIT MIN TYP MAX 1 tc(MXI2) Cycle time, MXI2/CLKIN2 37.037 (3) 37.037 (3) ns 2 tw(MXI2H) Pulse duration, MXI2/CLKIN2 high 0.45C 0.55C ns 3 tw(MXI2L) Pulse duration, MXI2/CLKIN2 low 0.45C 0.55C ns 0.25C or 4 tt(MXI2) Transition time, MXI2/CLKIN2 ns 10(4) 5 tJ(MXI2) Period jitter, MXI2/CLKIN2 0.02C ns (1) The reference points for the rise and fall transitions are measured at VIL MAX and VIH MIN. (2) C = MXI2/CLKIN2 cycle time in ns. For example, when MXI2/CLKIN2 frequency is 27 MHz use C = 37.037 ns. (3) tc(MXI2) = 37.037 ns is the only supported cycle time for MXI2/CLKIN2. (4) Whichever is smaller. C = the period of the applied signal. Maintaining transition times as fast as possible is recommended to improve noise immunity on input signals. Figure 5-8. MXI2/CLKIN2 Timing 108 DM355 Peripheral Information and Electrical Specifications Copyright © 2007–2010, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TMS320DM355 |
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