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X98021 датащи(PDF) 27 Page - Renesas Technology Corp |
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X98021 датащи(HTML) 27 Page - Renesas Technology Corp |
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27 / 29 page ![]() X98021 FN8219 Rev 3.00 Page 27 of 29 March 8, 2006 X98021 Serial Bus Address Write This is the 7 bit address of the X98021 on the 2 wire bus. The address is 0x4C if pin 48 is low, 0x4D if pin 48 is high. Shift this value to left when adding the R/W bit D7 D6 D5 D2 D4 D3 D1 D0 A0 A7 A2 A4 A3 A1 X98021 Register Data Write(s) This is the data to be written to the X98021’s configuration register. Note: The X98021’s Configuration Register’s address pointer auto increments after each data write: repeat this step to write multiple sequential bytes of data to the Configuration Register. A6 A5 1 00 0 1 A (pin 48) 0 1 R/W X98021 Register Address Write This is the address of the X98021’s configuration register that the following byte will be written to. X98021 Serial Bus Address START Command STOP Command (Repeat if desired) Signals the beginning of serial I/O Signals the ending of serial I/O S T A R T S T O P Data Write* Register Address Serial Bus Address A C K aaaaaaaa A C K dddddddd A C K 100110 A 0 * The data write step may be repeated to write to the X98021’s Configuration Register sequentially, beginning at the Register Address written in the previous step. SDA Bus Signals from the X98021 Signals from the Host FIGURE 15. CONFIGURATION REGISTER WRITE |
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