RT5028 datasheet(28/40 Pages) RICHTEK

28 / 40 page

DS5028-02

September 2016

www.richtek.com

RT5028

is a registered trademark of Richtek Technology Corporation.

Address 14

PWRON(Power On Key) time Parameters

Setting / RESET delay

Bit

Name

Description

R/W

Reset Value

[7:6]

START_TIME

Startup time setting

00 : 100us (pressing time - low level)

01 : 100ms

10 : 1s

11 : 2s

R/W

Option

[5:4]

L_PRESS_TIME

Long-press time setting (after Power-On,

00 : 1s (falling edge to rising edge)

01 : 1.5s

10 : 2s

11 : 2.5s

Sending short/long-press IRQ to CPU

ex :1.5s

=> low time < 1.5s (short IRQ)

=> low time > 1.5s but < 6s(shutdown time)

(long IRQ)

=> low time > 6s(shutdown time) (shutdown)

R/W

Option

[3:2]

SHDN_PRESS

Key-press forced shutdown time setting

00 : 4s (pressing time : low level)

01 : 6s

10 : 8s

11 : 10s

R/W

Option

[1:0]

RESET_DLY

RESET signal delay after the last power startup

is done

00 : 10ms

01 : 50ms

10 : 100ms

11 : 200ms

R/W

Option

Address 15

SHDN Control

Bit

Name

Description

Read/Write

Reset Value

SHDN_CTRL

Power Off setting by CPU, after set, 100ms

delayed power off

0 : Normal operation

1 : Disable the PMIC output

R/W

Option

SHDN_TIMING

Disable Buck/LDO only for normal power off

(SHDN_CTRL=1)

0 : disable at the same time

1 : contrary to the startup timing

(first_on-last_off)

R/W

Option

[5:4]

SHDN_DLYTIME

Delayed shutdown time after send the

(PWRON)key-press-forced-shutdown IRQ

(when IRQ is disable, there is no delay)

00 : 100ms

01 : 500ms

10 : 1s

11 : 2s

R/W

Option

[3:0]

Reserved

R/W

0000

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