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TNETV1647GSTZWT 数据表(PDF) 112 Page - Texas Instruments |
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TNETV1647GSTZWT 数据表(HTML) 112 Page - Texas Instruments |
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112 / 236 page  MXI/CLKIN 2 3 4 4 5 1 MXI/CLKIN 2 3 4 4 5 1 TMS320DM6441 SPRS359E – SEPTEMBER 2006 – REVISED AUGUST 2010 www.ti.com 6.6.3 Clock PLL Electrical Data/Timing (Input and Output Clocks) Table 6-16. Timing Requirements for MXI/CLKIN Devices(1) (2) (3) (4) (see Figure 6-14) 1.05 V and 1.2 V NO. UNIT MIN MAX 1 tc(MXI) Cycle time, MXI/CLKIN 33.3 50 ns 2 tw(MXIH) Pulse duration, MXI/CLKIN high 0.45C 0.55C ns 3 tw(MXIL) Pulse duration, MXI/CLKIN low 0.45C 0.55C ns 4 tt(MXI) Transition time, MXI/CLKIN 0.05C ns 5 tJ(MXI) Period jitter, MXI/CLKIN 0.02C ns (1) Setup before end of STROBE phase (if no extended wait states are inserted) by which EM_WAIT must be asserted to add extended wait states. Figure 6-23 and Figure 6-24 describe EMIF transactions that include extended wait states inserted during the STROBE phase. However, cycles inserted as part of this extended wait period should not be counted; the 4E requirement is to the start of where the HOLD phase would begin if there were no extended wait cycles. (2) The reference points for the rise and fall transitions are measured at VIL MAX and VIH MIN. (3) For more details on the PLL multiplier factors, see the TMS320DM644x ARM Subsystem Reference Guide (literature number SPRUE14). (4) C = CLKIN cycle time in ns. For example, when MXI/CLKIN frequency is 27 MHz, use C = 37.037 ns. Figure 6-14. MXI/CLKIN Timing Table 6-17. Timing Requirements for M24XI Devices(1) (2) (3) (see Figure 6-15) 1.05 V and 1.2 V NO. UNIT MIN TYP MAX 1 tc(M24XI) Cycle time, M24XI 41.6 ns 2 tw(M24XIH) Pulse duration, M24XI high 0.45C 0.55C ns 3 tw(M24XIL) Pulse duration, M24XI low 0.45C 0.55C ns 4 tt(M24XI) Transition time, M24XI 0.05C ns 5 tJ(M24XI) Period jitter, M24XI 0.02C ns (1) The reference points for the rise and fall transitions are measured at VIL MAX and VIH MIN. (2) For more details on the PLL, see the TMS320DM644x DMSoC Universal Serial Bus (USB) Controller User's Guide (literature number SPRUE35). (3) C = M24XI cycle time in ns. For example, when M24XI frequency is 24 MHz, use C = 41.6 ns. Figure 6-15. M24XI Timing 112 Peripheral and Electrical Specifications Copyright © 2006–2010, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TMS320DM6441 |
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