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FXPS7115D4 датащи(PDF) 18 Page - NXP Semiconductors |
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FXPS7115D4 датащи(HTML) 18 Page - NXP Semiconductors |
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18 / 75 page ![]() NXP Semiconductors FXPS7115D4 Digital absolute pressure sensor, 40 kPa to 115 kPa SCLK SS_B MOSI MISO SCLK SS_B MISO MOSI T2 T3 phase two response phase one: response-previous command phase one: command R2 R3 R1 T1 aaa-023747 Figure 20. Standard 32 Bit SPI protocol timing diagram 7.5.1 SPI command format There are two SPI commands as shown in Table 10. These are the Register Access command and the Sensor Data command. The Register Access command is a standard SPI read and write command which access the registers and are defined by field descriptions shown in Section 7.5.3.1 through Section 7.5.3.2. The Sensor Data command provides additional information such as basic and detailed sensor status if needed as defined by field descriptions shown in Section 7.5.3.3. MSB: bit 31; LSB: bit 0 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Register access command Command Fixed bits: must = 0h Register address Register data 8-bit CRC C[3:0] 0 0 0 0 RA[7:1] RA[0] RD[7:0] CRC[7:0] Sensor data command Command Fixed bits: must = 0 0000h 8-bit CRC C[3:0] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CRC[7:0] Table 10. SPI command format FXPS7115D4 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2022. All rights reserved. Product data sheet Rev. 6 — 6 June 2022 18 / 75 |
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