HS300x Datasheet

© 2021 Renesas Electronics Corporation

10

April 20, 2021

6. Sensor Interface

The HS300x series sensor uses a digital I2C-compatible communication protocol. To accommodate multiple devices, the protocol uses two

devices can share the bus; however only one master device can be present on the line.

6.1 I2C Features and Timing

The HS300x series sensor operates as a slave device on the I2C bus with support for 100kHz and 400kHz bit rates. Each transmission is

initiated when the master sends a 0 START bit (S), and the transmission is terminated when the master sends a 1 STOP bit (P). These bits are

only transmitted while the SCL line is HIGH.

Figure 14. Timing Diagram

SDA

SCL

Table 6.

I2C Timing Parameters

Parameter

Symbol

Minimum

Typical

Maximum

Unit

SCL Clock Frequency[a]

20

400

kHz

START Condition Hold Time Relative to SCL Edge

0.1

µs

Minimum SCL Clock LOW Width[b]

0.6

µs

Minimum SCL Clock HIGH Width[b]

0.6

µs

START Condition Setup Time Relative to SCL Edge

0.1

µs

Data Hold Time on SDA Relative to SCL Edge

0

0.5

µs

Data Setup Time on SDA Relative to SCL Edge

0.1

µs

STOP Condition Setup Time on SCL

0.1

µs

Bus Free Time Between STOP Condition and START Condition

1

µs

[a] The minimum frequency of 20kHz applies to test only; no minimum under normal operations.

[b] Combined LOW and HIGH widths must equal or exceed the minimum SCL period.

6.2 Sensor Slave Address

Custom I2C address can be provided upon request.