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Si4735-D60-GU2 Datasheet(PDF) 9 Page - Silicon Laboratories |
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Si4735-D60-GU2 Datasheet(HTML) 9 Page - Silicon Laboratories |
9 / 44 page Si4730/31/34/35-D60 Rev. 1.1 9 Table 4. 2-Wire Control Interface Characteristics1,2,3 (VA = 2.7 to 5.5 V, VD = 1.62 to 3.6 V, TA = –20 to 85 °C) Parameter Symbol Test Condition Min Typ Max Unit SCLK Frequency fSCL 0— 400 kHz SCLK Low Time tLOW 1.3 — — µs SCLK High Time tHIGH 0.6 — — µs SCLK Input to SDIO Setup (START) tSU:STA 0.6 — — µs SCLK Input to SDIO Hold (START) tHD:STA 0.6 — — µs SDIO Input to SCLK Setup tSU:DAT 100 — — ns SDIO Input to SCLK Hold4,5 tHD:DAT 0— 900 ns SCLK input to SDIO Setup (STOP) tSU:STO 0.6 — — µs STOP to START Time tBUF 1.3 — — µs SDIO Output Fall Time tf:OUT —250 ns SDIO Input, SCLK Rise/Fall Time tf:IN tr:IN —300 ns SCLK, SDIO Capacitive Loading Cb —— 50 pF Input Filter Pulse Suppression tSP — — 50 ns Notes: 1. When VD = 0 V, SCLK and SDIO are low impedance. 2. When selecting 2-wire mode, the user must ensure that a 2-wire start condition (falling edge of SDIO while SCLK is high) does not occur within 300 ns before the rising edge of RST. 3. When selecting 2-wire mode, the user must ensure that SCLK is high during the rising edge of RST, and stays high until after the first start condition. 4. The Si473x-D60 delays SDIO by a minimum of 300 ns from the VIH threshold of SCLK to comply with the minimum tHD:DAT specification. 5. The maximum tHD:DAT has only to be met when fSCL = 400 kHz. At frequencies below 400 KHz, tHD:DAT may be violated as long as all other timing parameters are met. 20 0.1 Cb 1pF ----------- + 20 0.1 Cb 1pF ----------- + |
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