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SPC56EC74L7 bảng dữ liệu(PDF) 102 Page - STMicroelectronics |
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SPC56EC74L7 bảng dữ liệu(HTML) 102 Page - STMicroelectronics |
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102 / 118 page ![]() Electrical Characteristics SPC564Bxx - SPC56ECxx 102/118 Doc ID 17478 Rev 4 Figure 33. DSPI PCS strobe (PCSS) timing 4.19.3 Nexus characteristics CSx 7 8 PCSS Note: Numbers shown reference Table 50. Table 51. Nexus debug port timing(1) Spec Characteristic Symbol Min Max Unit 1 MCKO Cycle Time(2) tMCYC 16.3 — ns 2 MCKO Duty Cycle tMDC 40 60 % 3 MCKO Low to MDO, MSEO, EVTO Data Valid(3) tMDOV –0.1 0.25 tMCYC 4 EVTI Pulse Width tEVTIPW 4.0 — tTCYC 5 EVTO Pulse Width tEVTOPW 1tMCYC 6 TCK Cycle Time(4) tTCYC 40 — ns 7 TCK Duty Cycle tTDC 40 60 % 8 TDI, TMS Data Setup Time tNTDIS, tNTMSS 8— ns 9 TDI, TMS Data Hold Time tNTDIH, tNTMSH 5— ns 10 TCK Low to TDO Data Valid tJOV 025 ns 1. JTAG specifications in this table apply when used for debug functionality. All Nexus timing relative to MCKO is measured from 50% of MCKO and 50% of the respective signal. Nexus timing specified at VDDE = 4.0 – 5.5 V, TA =TL to TH, and CL = 30 pF with SRC = 0b11. 2. MCKO can run up to 1/2 of full system frequency. It can also run at system frequency when it is <60 MHz. 3. MDO, MSEO, and EVTO data is held valid until next MCKO low cycle. 4. The system clock frequency needs to be three times faster than the TCK frequency. |
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