VCTA25201B-R33MS6 datasheet(24/50 Pages) RICHTEK

24 / 50 page

RTQ2134-QA

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DSQ2134-QA-02

May

2022

I2C Interface

The RTQ2134 I2C slave address = 7

’b0011000 (Changed by Factory Setting). The RTQ2134 supports fast mode

(bit rate up to 400kb/s). The write or read bit stream (N ≥ 1) is shown in Figure 11.

LSB

MSB

Assume Address = m

Data for Address = m

Data for Address = m + N - 1

Data for Address = m + 1

Assume Address = m

Data for Address = m

Data for Address = m + N - 1

Data for Address = m + 1

Slave Address

Data 1

R/W

Data N

LSB

MSB

Read N bytes from RTQ2134

LSB

MSB

Data 2

Data N

LSB

MSB

LSB

Slave Address

Data 1

Data 2

MSB

LSB

Write N bytes to RTQ2134

Driven by Master,

Driven by Slave (RTQ2134),

Start,

Repeat Start

Stop,

SDA

SCL

tLOW

tHD,STA

tHD,DAT

tHIGH

tSU,DAT

tSU,STA

tHD,STA

tSP

tBUF

tSU,STO

Figure 11. I2C Read and Write Stream and Timing Diagram

The RTQ2134 also supports High-speed mode (bit rate

up to 3.4Mb/s) with access code 08H. Figure 12 and

Figure 13 show detailed transfer format. Hs-mode can

only start after the following conditions (all of which are

in F/S-mode) :

 START condition (S)

 8-bit master code (00001xxx)

 not-acknowledge bit ( A )

Master Code

R/W

Data

A/A

Hs-Mode

Continues

F/S-Mode

Hs-Mode (current-source for SCLH enabled

F/S-Mode

N bytes + ack.

Slave ADD.

Figure 12. Data Transfer Format in Hs-mode

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