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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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GS3281 датащи(PDF) 49 Page - Semtech Corporation |
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GS3281 датащи(HTML) 49 Page - Semtech Corporation |
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49 / 97 page  GS3281 Final Data Sheet Rev.7 PDS-061453 January 2019 49 of 97 Semtech Proprietary & Confidential www.semtech.com Table 4-10: GSPI Timing Parameters Parameter Symbol Equivalent SCLK Cycles Min Typ Max Units SCLK Frequency — — — — 27 MHz CS LOW Before SCLK Rising Edge t0 —1.7 — — ns SCLK Period t1 —37 — — ns SCLK Duty Cycle t2 —40 50 60 % Input Data Setup Time t3 —2.3 — — ns SCLK Idle Time – Write t4 1 1/SCLK — — ns SCLK Idle Time – Read t5 — 138 — — ns Inter–Command Delay Time tcmd 3 115 — — ns Inter–Command Delay Time (after GSPI configuration write) tcmd_GSPI_conf 1 4 139 — — ns SDOUT After SCLK Falling Edge t6 — 1.3 — 6.4 ns CS HIGH After Final SCLK Falling Edge t7 —0 — — ns Input Data Hold Time t8 —1.2 — — ns CS HIGH Time t9 —58 — — ns SDIN to SDOUT Combinatorial Delay —— — — 3.4 ns Max chips daisy-chained at max SCLK frequency (26 MHz) When host clocks in SDOUT data on falling edge of SCLK —— 8 # of compatible Semtech devices Max frequency for 32 daisy-chained devices When host clocks in SDOUT data on falling edge of SCLK —— 7.5 MHz Note: 1. tcmd_GSPI_conf inter-command delay must be used whenever modifying CONTROL_REG register at address 0x00. |
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