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DRA821U4...ALM 数据表(PDF) 186 Page - Texas Instruments |
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DRA821U4...ALM 数据表(HTML) 186 Page - Texas Instruments |
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186 / 252 page ![]() Table 7-43. I3C Push-Pull Timing Parameters for SDR and HDR-DDR Modes (continued) NO. PARAMETER DESCRIPTION MODE MIN MAX UNIT D2 tLOW SCL Clock Low Period Controller 24 ns tDIG_L 32 ns D3 tHIGH_MIXED SCL Clock High Period of Mixed Bus (Mixed Bus Topology Not Supported) Controller 24 ns tDIG_H_MIXED 32 45 ns D4 tHIGH SCL Clock High Period Controller 24 ns tDIG_H 32 ns D5 tSCO Clock in to Data Out for Target Target 12 ns D6 tCR SCL Clock Rise Time Controller 150 × 1 / fSCL 60 ns D7 tCF SCL Clock Fall Time Controller 150 × 1 / fSCL 60 ns D8 tHD_PP SDA Signal Data Hold in Push Pull Mode Controller tCR + 3 and tCF + 3 ns Target 0 ns D9 tSU_PP SDA Signal Data Setup In Push-Pull Mode Controller, Target 3 ns D10 tCASr Clock After Repeated START (Sr) Controller tCAS MIN ns D11 tCBSr Clock Before Repeated START (Sr) Controller tCAS MIN / 2 ns 1. FSCL = 1 / (tDIG_L + tDIG_H) 2. tDIG_L and tDIG_H are the clock Low and High periods as seen at the receiver end of the I3C Bus using VIL and VIH. 3. When communicating with an I3C Device on a mixed Bus, the tDIG_H_MIXED period must be constrained to make sure that I2C Devices do not interpret I3C signaling as valid I2C signaling. 4. As both edges are used, the hold time needs to be satisfied for the respective edges; tCF + 3 for falling edge clocks, and tCR + 3 for rising edge clocks. 5. Clock Frequency Minimum 0.01 MHz, Maximum 12.5 MHz - Open drain with weak pull-up - Open drain with weak pull-up I3C_TIMING_02 SCL SDA D1 D2 D7 D6 D8 D9 D5 Start Stop Repeated Start Stop 0.7xVDD 0.3xVDD 0.7xVDD 0.3xVDD D9 D5 D4 D11 D10 Figure 7-76. I3C Push-Pull Timing (SDR and HDR-DDR Modes) DRA821U-Q1 SPRSP57D – APRIL 2020 – REVISED DECEMBER 2022 www.ti.com 186 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: DRA821U-Q1 |
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