RK816 datasheet(13/78 Pages) ROCKCHIP

13 / 78 page

RK816 Datasheet

Rev 1.3

PIN NO

PIN NAME

PIN DESCRIPTION

SW5

Charger switching node / boost switching node

MIDU

Middle point of USB power supply / boost output

USB

USB power supply

VCC3

Power supply of buck3

SW3

Switching node of buck3

VFB3

Output feedback voltage of buck3

XIN

32.768KHz crystal oscillator input

XOUT

32.768KHz crystal oscillator output

PWRON

Power on or power off enable pin, active low, internal 20k

pull high to power supply

VCC2

Power supply of buck2

SW2

Switching node of buck2

VFB2

Output feedback voltage of buck2

VCC1

Power supply of buck1

SW1

Switching node of buck1

VFB1

Output feedback voltage of buck1

NRESPWON

Reset pin after power on, active low.

CLK32K

32.768KHz clock output, open drain

LDO3

LDO3 output

VCC5

Power supply of LDO1/2/3

LDO1

LDO1 output

LDO2

LDO2 output

REFGND

Reference ground

VREF

Internal reference voltage

LDO4

LDO4 output

LDO5

LDO5 output

VCC6

Power supply of LDO4/5/6

LDO6

LDO6 output

VCCRTC

Power supply of RTC, decouple it to GND with a 1uF cap

SNSN

Battery charging or discharging current sense negative

terminal

SNSP

Battery charging or discharging current sense postive

terminal

TS(GPIO1)

Thermistor input. Connect a thermistor from this pin to

ground.

The thermistor is usually inside the battery pack. (multi-

function for GPIO1)

BAT

Battery positive terminal

SYS

System terminal

SW4

Switching node of buck4

VFB4

Output feedback voltage of buck4

VCC4

Power supply of buck4

SLEEP

Sleep mode control input

Exposed

pad

Exposed

ground

Ground

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