RT5021 datasheet(56/67 Pages) RICHTEK

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RT5021

DS5021-01 April 2013

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

THR bit can be let user to monitor the thermal regulation function is working or not.

0 : thermal Regulation is not working

1 : thermal Regulation is working

THR

Note : when PMU turn on, it would check the bit THR and compare to the value 0. If

it is different, INT would be asserted. After PMU is on, once THR bit toggles, INT

also asserts again.

Charger safety timer status.

0 : charger in charging or suspended by thermal loop

1 : safety timer expired

SAFE

Note : when PMU turn on, it would check the bit SAFE and compare to the value 0.

If it is different, INT would be asserted. After PMU is on, once SAFE bit toggles,

INT also asserts again.

Address

Names

Bit7

(MSB)

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

(LSB)

Meaning

CHG_TYP [2:0]

Reserved Reserved CHG_2DET CHG_1DET CHGRUN

Default

A11

0x0B

Read/Write

R/W

The CHG_TYP [2:0] is used to recode the charger type.

Code

Charger Type

Code

Charger Type

000

Standard USB

CHARGER (SDP)

100

APPLE CHARGER (1A)

001

Sony CHARGER -1

111

DEDICATED CHARGER (DCP)

010

Sony CHARGER -2

CHG_TYP [2:0]

011

APPLE CHARGER

(0.5A)

110

Charging Downstream Port (CDP)

(High current Host/Hub)

The CHG_2DET bit is used to enable the secondary charger detection (to

distinguish CDP and DCP). Default value is 0. Set this bit value to 1 in order to

enable charger detection.

0 : Secondary CHARGER DETECTION DISABLED

CHG_2DET

1 : Secondary CHARGER DETECTION ENABLE.

The CHG_1DET bit is used to enable the primary charger detection. Default value

is 1 (auto-detect charger type when VIN plug in). Toggle this bit value (set to 0 and

then set 1) to re-enable charger detection.

0 : Primary CHARGER DETECTION DISABLED.

CHG_1DET

1 : Primary CHARGER DETECTION ENABLE.

The CHGRUN bit is the charger detector status bit. It means the charger detection

is running or not.

0 : CHARGER DETECTION NOT RUNING.

1 : CHARGER DETECTION RUNNING.

CHGRUN

Note : when PMU turn on, it would check the bit CHGRUN and compare to the

value 1. If it is different, INT would be asserted. After PMU is on, once CHGRUN

bit change from 1 to 0, INT also asserts again.

RT5021 数据表(PDF) 56 Page - Richtek Technology Corporation

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