ACT8941A datasheet(26/42 Pages) ACTIVE-SEMI

26 / 42 page

ACT8941A

Rev 0, 12-Mar-13

- 26 -

www.active-semi.com

ActivePMU

TM and ActivePathTM are trademarks of Active-Semi.

I2CTM is a trademark of NXP.

Innovative PowerTM

Active-Semi Proprietary―For Authorized Recipients and Customers

SYSTEM CONTROL INFORMATION

The ACT8941A is optimized for use in applications

using the Rockchip RK2906/RK2918 processors,

supporting both the power domains as well as the

signal interface for these processors.

While the ACT8941A supports many possible

configurations for powering a processors, one of the

most common configurations is detailed in this

datasheet. In general, this document refers to the

ACT8941A pin names and functions. However, in

cases where the description of interconnections

between these devices benefits by doing so, both

the ACT8941A pin names and the Rockchip

RK2906/RK2918

processor

names

are

provided. When this is done, the Rockchip

RK2906/RK2918 pin names are located after the

ACT8941A pin names, and are italicized and

located inside parentheses. For example, OUT1

(IO) refers to ACT8941A's OUT1 pin, identifying

that

connected

the

Rockchip

RK2906/RK2918’s IO power domain.

Interfacing with the Rockchip RK2906/RK2918 Processor

Table 3:

ACT8941A and Rockchip RK2906/RK2918 Power Modes

Table 2:

ACT8941A and Rockchip RK2906/RK2918 Power Domains

POWER DOMAIN

ACT8941A CHANNEL TYPE DEFAULT VOLTAGE CURRENT CAPABILITY

IO, GSensor, NandFlash, USB_Host11,

TP VCC, CODEC_3.0V, Camera IO

etc.

REG1

DC/DC

3.0V

1100mA

DDR3

REG2

DC/DC

1.5V

1100mA

Core

REG3

DC/DC

1.2V

1200mA

ARM_PLL_2.5V, USB_PHY_2.5V,

RK2918_SAR-ADC_2.5V

REG4

LDO

2.5V

320mA

VCC_SD

REG6

LDO

3.0V

320mA

LCD_VCC

REG7

LDO

3.0V

320mA

Camera_1.8V

REG5

LDO

1.8V

320mA

POWER

MODE

CONTROL STATE

POWER DOMAIN STATE

QUIESCENT

CURRENT

NORMAL

PWRHLD is asserted

REG1, REG2, REG3, REG4, REG5,

REG6 and REG7 are on.

420µA

SYSTEM

OFF

PWRHLD is de-asserted.

REG1, REG2, REG3, REG4, REG5,

REG6 and REG7 are all off.

<18µA

Table 4:

ACT8941A and RK2906/RK2918 Signal Interface

ACT8941A

DIRECTION

RK2906/RK2918

SCL

I2C3_SCL

SDA

I2C3_SDA

VSEL

GPIO4_D0

nRSTO

NPOR

nIRQ

BAT_LOW

nPBSTAT

Power_KEY

PWRHLD

Power_ON

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