FXPS7115D4 datasheet(16/75 Pages) NXP

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NXP Semiconductors

FXPS7115D4

Digital absolute pressure sensor, 40 kPa to 115 kPa

7.4.6.2 Register read transfers

The device supports I2C register read data transfers. Register read data transfers are

constructed as follows:

1. The host transmits a START condition.

2. The host transmits the 7-bit client address.

3. The host transmits a '0' for the read/write bit to indicate a write operation.

4. The client transmits an ACK.

5. The host transmits the register address to be read.

6. The client transmits an ACK.

7. The host transmits a repeat START condition.

8. The host transmits the 7-bit client address.

9. The host transmits a '1' for the read/write bit to indicate a read operation.

10. The client transmits an ACK.

11. The client transmits the data from the register addressed.

12. The host transmits a NACK.

13. The host transmits a STOP condition.

rSTART

CLIENT ADDRESS

Host transmission

Client transmission

aaa-029919

7.4.6.3 Sensor data register read wrap around

The device includes automatic sensor data register read wrap-around features to

optimize the number of I2C transactions necessary for continuous reads of sensor data.

Depending on the state of the SIDx_EN bits in the SOURCEID_0 and SOURCEID_1

registers, the register address automatically wraps back to the DEVSTAT_COPY register

as shown in Table 9.

SID1_EN

SID0_EN

Address increment and wrap-around effect

Optimized register-read sequence

Address wraps around from FFh to 00h

None

Address wraps from 63h (SNSDATA0_H) to 61h

(DEVSTAT_COPY)

DEVSTAT_COPY, SNSDATA0_L, SNSDATA0_H

Address wraps from 65h (SNSDATA1_H) to 61h

(DEVSTAT_COPY)

DEVSTAT_COPY, SNSDATA0_L, SNSDATA0_H,

SNSDATA1_L, SNSDATA1_H

Address wraps from 69h (SNSDATA0_TIME3) to 61h

(DEVSTAT_COPY)

DEVSTAT_COPY, SNSDATA0_L, SNSDATA0_H,

SNSDATA1_L, SNSDATA1_H, SNSDATA0_TIME0,

SNSDATA0_TIME1, SNSDATA0_TIME2, SNSDATA0_

TIME3

Table 9. Sensor data register read wrap-around description

FXPS7115D4

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 6 — 6 June 2022

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