ACT8931A datasheet(26/42 Pages) ACTIVE-SEMI

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ACT8931A

Rev 3, 29-Nov-12

Innovative Power

ActivePMU

TM and ActivePathTM are trademarks of Active-Semi.

2CTM is a trademark of NXP.

- 26 -

www.active-semi.com

SYSTEM CONTROL INFORMATION

The ACT8931A is optimized for use in applications

using the Rockchip RK2928/RK2926 processors,

supporting both the power domains as well as the

signal interface for these processors.

While the ACT8931A supports many possible

configurations for powering a processor, one of the

most common configurations is detailed in this

datasheet. In general, this document refers to the

ACT8931A pin names and functions. However, in

cases where the description of interconnections

between these devices benefits by doing so, both

the ACT8931A pin names and the Rockchip

RK2928/RK2926

processors

names

are

provided. When this is done, the Rockchip

RK2928/RK2926 pin names are located after the

ACT8931A pin names, and are italicized and

located inside parentheses. For example, OUT1

(IO) refers to ACT8931A's OUT1 pin, identifying

that

connected

the

Rockchip

RK2928/RK2926’s IO power domain.

Interfacing with the Rockchip RK2928/RK2926 Processors

Table 3:

ACT8931A and Rockchip RK2928/RK2926 Power Modes

Table 2:

ACT8931A and Rockchip RK2928/RK2926 Power Domains

POWER DOMAIN

ACT8931A CHANNEL TYPE

DEFAULT VOLTAGE CURRENT CAPABILITY

IO, GSensor, NandFlash, USB_Host11,

TP VCC, CODEC_3.0V, Camera IO

etc.

REG1

DC/DC

3.3V

1100mA

DDR3

REG2

DC/DC

1.5V

1100mA

Core

REG3

DC/DC

1.2V

1200mA

VDD28_CIF

REG4

LDO

2.8V

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:

ACT8931A and RK2928/RK2926 Signal Interface

ACT8931A

DIRECTION

RK2928/RK2926

SCL

I2C3_SCL

SDA

I2C3_SDA

VSEL

GPIO4_D0

nRSTO

NPOR

nIRQ

BAT_LOW

nPBSTAT

Power_KEY

PWRHLD

Power_ON

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