APW8855 Datasheet, PDF (34/43 Pages) Anpec Electronics Coropration – High Current, High Frequency 7 Outputs Voltage Regulator and Power Management IC for High Performance Tablet and Ultra Notebook Applications

APW8855
15.2 I2C Function Description(Cont.)
S
7bit Slave
Address
R/W A
8bit
Address
A
Sr
7bit Slave
Address
R/W A
8bit Data A
8bit Data _A P
7'h6E
‘0’
Reg . Address
7'h6E
‘1’
Reg. First
Byte Data
Reg. Last
Byte Data
Master to Slave
Slave to Master
A = Acknowledge ( SDA LOW )
A = Not Acknowledge ( SDA HIGH )
S = START Condition
Sr = Repeated START Condition
P = STOP Condition
Figure 4. I2C Fast Speed / Fast Speed Plus Multiple Byte Read
Fast Speed
(400kHz)
S
8bit Master Code
“0000 1XXX”
A Sr
7bit Slave
Address
High Speed
(3.4MHz)
R/W A
8bit
Address
A
8bit
Data
AP
7'h6E
‘0’
Reg. Address
Reg. Data
Master to Slave
Slave to Master
A = Acknowledge ( SDA LOW )
A = Not Acknowledge ( SDA HIGH )
S = START Condition
Sr = Repeated START Condition
P = STOP Condition
Figure 5. I2C High Speed Single Byte Write
Fast Speed
(400kHz)
High Speed
(3.4MHz)
S
8bit Master Code
“0000 1XXX”
A
Sr
7bit Slave
Address
R/W
A
8bit
Address
A
8bit
Data
A
8bit
Data
AP
7'h 6E ^{‘0’}
R. eg.
Address
Reg. First
Byte Data
Reg. Last
Byte Data
Master to Slave
Slave to Master
A= Acknowledge ( SDA LOW )
A= Not Acknowledge ( SDA HIGH )
S= START Condition
Sr=Repeated Start Condition
P= STOP Condition
Figure 6. I2C High Speed Multiple Byte Write
Copyright © ANPEC Electronics Corp.
34
Rev. A.1 - Dec., 2015
www.anpec.com.tw