RT5021 datasheet(47/67 Pages) RICHTEK

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RT5021

DS5021-01 April 2013

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

I2C Register File

Address

Name

Bit7

(MSB)

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

(LSB)

Meaning

RST_P

RST_C

OVP7

Reserved

ENDPM

TSD

MOD7

TSSEL

Default

0x00

Read/Write

R/W

RT5021 would reset PMU-related registers under any one of the below two

conditions :

1) VDDI

< 1.3V

2) (EN pin = low and A0.RST_P = 1)

In the 2

condition, RT5021 uses the register bit A0.RST_P to decide whether the

PMU-related registers are reset or not when EN pin goes low.

0 : Don’t reset register (0x3 to 0x6)

RST_P

1 : Reset register (0x3 to 0x6).

RT5021 would reset Charge-related register under any one of the below three

conditions :

1) VIN

< 4V

2) VDDI

< 1.3V

3) (BAT

< 3.1V) and (A0.RST_C = 1)

In the 3

condition, RT5021 uses the register bit A0.RST_C to decide whether the

Charge-related registers are reset or not when BAT

< 3.1V.

0 : Don’t reset register (0x7 to 0x9).

RST_C

1 : Reset register (0x7 to 0x9)

CH7 allow user to select the OVP level by I

C interface

0 : 16V OVP

OVP7

1 : 25V OVP

Enable the charger VIN DPM function. But if VIN charger type is detected as SDP

(CHG_TYP [2:0] = 000), the DPM function always is enabled.

0 : VIN DPM function disabled

ENDPM

1 : VIN DPM function enabled.

Report whether thermal shutdown of PMU ever occurs. Reset it by writing 0 into

the bit or (VDDI < 1.3V).

0 : Thermal Shutdown has not occurred.

TSD

1 : Thermal Shutdown event ever occurs.

Report the result of CH7 mode detection.

0 : Current Source.

MOD7

1 : Boost.

TS/VP ratio setting for battery temperature.

0 : TS/VP = 60% (0°C), 28% (60°C)

TSSEL

1 : TS/VP = 74% (0°C), 28% (60°C)

RT5021 数据表(PDF) 47 Page - Richtek Technology Corporation

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