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GS6151 Datasheet(PDF) 33 Page - Semtech Corporation |
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GS6151 Datasheet(HTML) 33 Page - Semtech Corporation |
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33 / 77 page ![]() GS6151 Final Data Sheet Rev.4 PDS-060389 August 2015 33 of 77 Semtech Proprietary & Confidential www.semtech.com 4.11.6 GSPI Transaction Timing Figure 4-10: GSPI External Interface Timing X t cmd_GSPI_config t cmd t 9 SCLK SDOUT SDIN X CS R /W BCST SCLK Write Mode SDI signal is looped out on SDO SDOUT EMEM Auto_Inc A4 A3 A2 A1 A0 R /W BCST SDIN EMEM Auto_Inc UA4 UA3 UA2 UA1 UA0 A4 A3 A2 A1 A0 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 D15 D14 D13 D12 D11 D10 D9 D8 t 0 t 8 t 2 t 3 t 1 t 7 t 4 A6 A5 UA4 UA3 UA2 UA1 UA0 A6 A5 CS R/W RSV Read Mode SDI signal is looped out on SDO EMEM Auto_Inc A4 A3 A2 A1 A0 Read Data is output on SDO D0 R/W RSV EMEM Auto_Inc A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D15 D14 D13 D12 D11 D10 D9 D8 t 9 t 6 t 5 UA4 UA3 UA2 UA1 UA0 A6 A5 UA4 UA3 UA2 UA1 UA0 A6 A5 SCLK SDOUT SDIN CS Table 4-8: GSPI Timing Parameters Parameter Symbol Equivalent SCLK Cycles (at 27MHz) Min Typ Max Units SCLK frequency — — 27 MHz CS low before SCLK rising edge t0 2.0 — — ns SCLK period t1 37 — — ns SCLK duty cycle t2 40 50 60 % Input data setup time t3 2.7 — — ns SCLK idle time -write t4 137 — — ns SCLK idle time - read t5 5 161.0 — — ns |
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