FDA903U datasheet(60/80 Pages) STMICROELECTRONICS

部品番号	FDA903U

部品情報	1 x 45 W class D digital input automotive power amplifier with ILoad current monitoring, wide voltage operation range for car audio and telematic

PDF	80 Pages

Scroll/Zoom	100%

メーカー	STMICROELECTRONICS [STMicroelectronics]

ホームページ	http://www.st.com

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60 / 80 page

I2C bus interface

FDA903U

60/80

DS12498 Rev 2

Figure 75. Without/with auto-increment reading procedure

If a microcontroller tries to read an undefined register, FDA903U will return a "0xFF" data;

for more details refer directly to I2C specification.

13.3

Data validity

The data on the SDA line must be stable during the high period of the clock. The HIGH and

LOW state of the data line can only change when the clock signal on the SCL line is LOW.

13.4

Start and stop conditions

A start condition is a HIGH to LOW transition of the SDA line while SCL is HIGH.

The stop condition is a LOW to HIGH transition of the SDA line while SCL is HIGH.

13.5

Byte format

Every byte transferred to the SDA line must contain 8 bits. Each byte must be followed by an

acknowledge bit. The MSB is transferred first.

13.6

Acknowledge

The transmitter* puts a resistive HIGH level on the SDA line during the acknowledge clock

pulse. The receiver** has to pull-down (LOW) the SDA line during the acknowledge clock

pulse, so that the SDA line is stable LOW during this clock pulse.

* Transmitter

= master (μP) when it writes an address to the FDA903U

= slave (FDA903U) when the μP reads a data byte from FDA903U

** Receiver

= slave (FDA903U) when the μP writes an address to the FDA903U

= master (μP) when it reads a data byte from FDA903U

FDA903U データシート(PDF) 60 Page - STMicroelectronics