RT5021 Datasheet, PDF (45/67 Pages) Richtek Technology Corporation – Channels DC/DC PMU with Li-ion Battery Charger

RT5021
I²C Interface
RT5021 I²C slave address = 0010010 (7 bits). I²C interface supports fast mode (bit rate up to 400kb/s). The write or read
bit stream (N ≥ 1) is shown below :
Read N bytes from RT5021
Slave Address
Register Address
Slave Address
MSB
Data 1
LSB
S
0A
A Sr
R/W
Assume Address = m
1A
A
Data for Address = m
MSB
Data 2
LSB
MSB
Data N
LSB
A
Data for Address = m + 1
AP
Data for Address = m + N - 1
Write N bytes to RT5021
Slave Address
Register Address
MSB
Data 1
LSB MSB
Data 2
LSB
S
0A
A
A
A
R/W
Assume Address = m
Data for Address = m
Data for Address = m + 1
MSB
Data N
LSB
Driven by Master, Driven by Slave (RT5021),
AP
Data for Address = m + N - 1
P Stop, S Start, Sr Repeat Start
I²C Waveform Information
SDA
t_F
t_LOW
t_R
t_SU,DAT
t_F
t_HD,STA
SCL
t_HD,STA
S
t_HD,DAT
t_HIGH
t_SU,STA
S_r
t_SP
t_R
t_BUF
t_SU,STO
P
S
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS5021-01 April 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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