SC627A_09 Datasheet, PDF (22/24 Pages) Semtech Corporation – LED Light Management Unit Charge Pump, 4 LEDs, 700mA Flash LED,Dual LDOs, and I2C Interface

SC627A
Serial Interface (continued)
I²C Direct Format Write
S Slave Address W A Register Address A
S – Start Condition
W – Write = ‘0’
A – Acknowledge (sent by slave)
P – Stop condition
Slave Address – 7-bit
Register address – 8-bit
Data – 8-bit
Data
I²C Stop Separated Format Read
Register Address Setup Access
Master Addresses
other Slaves
S Slave Address W A Register Address A P S Slave Address B
AP
Register Read Access
S/Sr Slave Address R A Data
NACK P
S – Start Condition
W – Write = ‘0’
R – Read = ‘1’
A – Acknowledge (sent by slave)
NAK – Non-Acknowledge (sent by master)
Sr – Repeated Start condition
P – Stop condition
I²C Combined Format Read
Slave Address – 7-bit
Register address – 8-bit
Data – 8-bit
S Slave Address W A Register Address A Sr Slave Address R A
S – Start Condition
W – Write = ‘0’
R – Read = ‘1’
A – Acknowledge (sent by slave)
NAK – Non-Acknowledge (sent by master)
Sr – Repeated Start condition
P – Stop condition
Slave Address – 7-bit
Register address – 8-bit
Data – 8-bit
Data
NACK P
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