LM3561 Datasheet, PDF (23/36 Pages) Texas Instruments – LM3561 Synchronous Boost Converter with 600mA High Side LED Driver and I 2 C-Compatible Interface

FIGURE 13. I²C-Compatible Timing
301139119
I²C-COMPATIBLE CHIP ADDRESS
The 7 bit I²C-compatible device address for the LM3561 is
1010011 (53). After the START condition, the I²C master
sends the 7-bit address followed by an eighth bit, read or write
(R/W). R/W = 0 indicates a WRITE (0xA6) and R/W = '1' in-
dicates a READ (0xA7). The second byte following the device
address selects the register address to which the data will be
written. The third byte contains the data for the selected reg-
ister.
FIGURE 14. Device Address
30113920
TRANSFERRING DATA
Every byte on the SDA line must be eight bits long with the
most significant bit (MSB) transferred first. Each byte of data
must be followed by an acknowledge bit (ACK). The acknowl-
edge related clock pulse (9th clock pulse) is generated by the
master. The master releases SDA (HIGH) during the 9th clock
pulse (write mode). The LM3561 pulls down SDA during the
9th clock pulse, signifying an acknowledge. An acknowledge
is generated after each byte has been received.
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