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RT5021 数据表(PDF) 46 Page - Richtek Technology Corporation

部件名 RT5021
功能描述  Channels DC/DC PMU with Li-ion Battery Charger
PDF  67 Pages
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制造商  RICHTEK [Richtek Technology Corporation]
网页  http://www.richtek.com
标志 RICHTEK - Richtek Technology Corporation

RT5021 数据表(HTML) 46 Page - Richtek Technology Corporation

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RT5021
46
DS5021-01 April 2013
www.richtek.com
Copyright
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
©
Type I : 10-bit slave address data format
In 10-bit addressing, the slave address is sent in the first two bytes. The first byte begins with the special reserved
address of 11110XX which indicates that 10-bit addressing is being used.
Type II : 2-byte register address data format
The register address is combined with 2-byte as below.
When RT5021 and other I2C devices with 10-bit slave addressing (type I) or two-byte register addressing (type II) coexist
in one I2C bus, RT5021 need one dummy I2C write frame to reset the RT5021 internal I2C operation state. The below
shows a dummy write frame example, that is to write RT5021 register A10 [7:0] = 00000000. Master should ignore the
write operation (This operation is invalid). After the dummy frame, the master can read/write formal I2C frame for RT5021
to get right operation.
S
0
A
Slave Address
Register Address
Slave Address
Sr
A
A
1
MSB
A
A
Data 1
LSB
2-Byte Register Address
S
x
x
R/W
1
1
1
1
0
x
xACK
Bit 0
ACK
Bit 7
Bit 8
Bit 9
x
x
x
x
Bit 0
LSB
Bit 9
MSB
10-Bit
Address
x
x
x
x
x
x
x
x
x
x
x
x
MSB
LSB
S
A P
Read 2 bytes Type I/Type II data.
S
A P
S
A P
Read RT5021 data.
S
A P
S
P
S
P
Write RT5021 data.
Write 2 bytes Type I/Type II data.
A
S
A P
Write 2 bytes Type I/Type II data.
S
A P
S
A P
Read RT5021 data.
S
A P
S
P
Write RT5021 register
A10[7:0] = 00000000 data.
S
P
Write RT5021 data.
Read 2 bytes Type I/Type II data.
A
Dummy I
2C write frame.
Normal I
2C read/write frame
A
A
Write RT5021 register
A10[7:0] = 00000000 data.
Write RT5021 register
A10[7:0] = 00000000 data.
Write RT5021 register
A10[7:0] = 00000000 data.



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