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TRF3762 Datasheet(PDF) 10 Page - Texas Instruments |
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TRF3762 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 33 page SERIAL INTERFACE PROGRAMMING REGISTERS DEFINITION tsu1 th t(CLK) tsu2 tw 1” ClockPike CLOCK DATA STROBE DB0(LSB) Addressbit1 DB1 Addressbit2 DB2 Addressbit3 DB29 Cmdbit30 DB30 Cmdbit31 DB31(MSB) Cmdbit32 TRF3762 SLWS205A – JANUARY 2008 – REVISED MAY 2008 ....................................................................................................................................................... www.ti.com The TRF3762 features a 3-wire serial programming interface that controls an internal, 32-bit shift register. There are a total of 3 signals that need to be applied: the CLOCK (pin 3), the serial DATA (pin 4) and the STROBE (pin 5). The DATA (DB0-DB31) is loaded LSB first and is read on the rising edge of the CLOCK. The STROBE is asynchronous to the CLOCK and at its rising edge the data in the shift register gets loaded onto the selected internal register. The first four bits (DB0-DB3) is the address to select the available internal registers. A. The first 4 bits, DB(3-0), of data are Address bits. The 28 remaining bits, DB(31-4), are part of the command. The command is little endian or lower bits first. Figure 11. Serial Programming Timing Diagram Register Address REST Charge Pump Current Output Mode OUTBUF PD Reference Clock Divider (RDiv) Select EN_SEL BUFOUT DB0 DB1 DB2 DB3 DB4 DB5 DB6 DB7 DB8 DB9 DB10 DB11 DB12 DB13 DB14 DB15 Reference Clock Divider (RDiv) Anti Backlash PFD_P TRIS_C CP_TE Full Cal OL P ST Req DB16 DB17 DB18 DB19 DB20 DB21 DB22 DB23 DB24 DB25 DB26 DB27 DB28 DB29 DB30 DB31 Figure 12. Register 1 10 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): TRF3762 |
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