FXPS7115D4 datasheet(13/72 Pages) NXP

13 / 72 page

NXP Semiconductors

FXPS7115D4

Digital absolute pressure sensor, 40 kPa to 115 kPa

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SDA

SDA stable

SDA = `1'

SDA stable

SDA = `0'

SDA

changes

SCL

Figure 14. I2C bit transmissions

7.4.2 I2C start condition

A bus operation is always started with a start condition (START) from the host. A START is defined as a high to

low transition on SDA while SCL is high as shown in Figure 15. After the START signal has been transmitted by

the host, the bus is considered busy. Timing for the start condition is specified in Table 105.

A start condition (START) and a repeat START condition (rSTART) are identical.

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SDA

SCL

START

Figure 15. I2C start condition

7.4.3 I2C byte transmission

Data transfers are completed in byte increments. The number of bytes that can be transmitted per transfer

is unrestricted. Each byte must be followed by an acknowledge bit (Section 7.4.4 "I2C acknowledge and not

acknowledge transmissions") from the receiver. Data is transferred with the most significant bit (MSB) first (see

Figure 16). The host generates all clock pulses, including the ninth clock for the acknowledge bit. Timing for

the byte transmissions is specified in Section 7.4.4 "I2C acknowledge and not acknowledge transmissions". All

functions for this device are completed within the acknowledge clock pulse. Clock stretching is not used.

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SDA

SCL

ACK

from client

from receiver

STOP

START

Figure 16. I2C byte transmissions

FXPS7115D4

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

Product data sheet

Rev. 6.2 — 28 June 2023

13 / 72

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