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AD9548/PCBZ Scheda tecnica(PDF) 57 Page - Analog Devices |
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AD9548/PCBZ Scheda tecnica(HTML) 57 Page - Analog Devices |
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57 / 112 page ![]() AD9548 Rev. 0 | Page 57 of 112 Data Transfer Format Write byte format—the write byte protocol is used to write a register address to the RAM starting from the specified RAM address. S Slave address W A RAM address high byte A RAM address low byte A RAM Data 0 A RAM Data 1 A RAM Data 2 A P Send byte format—the send byte protocol is used to set up the register address for subsequent reads. S Slave address W A RAM address high byte A RAM address low byte A P Receive byte format—the receive byte protocol is used to read the data byte(s) from RAM starting from the current address. S Slave address R A RAM Data 0 A RAM Data 1 A RAM Data 2 A P Read byte format—the combined format of the send byte and the receive byte. S Slave Address W A RAM Address High Byte A RAM Address Low Byte A Sr Slave Address R A RAM Data 0 A RAM Data 1 A RAM Data 2 A P I²C Serial Port Timing SSr P S SDA SCL tSP tHD; STA tSU; STA tSU; DAT tHD; DAT tHD; STA tHI tLO tSU; STO tBUF tR tF tR tF Figure 64. I²C Serial Port Timing Table 34. I2C Timing Definitions Parameter Description fSCL Serial clock tBUF Bus free time between stop and start conditions tHD; STA Repeated hold time start condition tSU; STA Repeated start condition setup time tSU; STO Stop condition setup time tHD; DAT Data hold time tSU; DAT Date setup time tLO SCL clock low period tHI SCL clock high period tR Minimum/maximum receive SCL and SDA rise time tF Minimum/maximum receive SCL and SDA fall time tSP Pulse width of voltage spikes that must be suppressed by the input filter |
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