RT1650 datasheet(20/26 Pages) RICHTEK

20 / 26 page

RT1650

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS1650-00

July

2015

2C Interface

The RT1650 provides I2C interface to communicate

with external host device. Besides OTP firmware

programming and MTP setting programming can be

approached through the I2C interface, the external host

can also communicate with the RT1650 to achieve

more flexible applications. For example, the host can

read the ADC information via the I2C Interface. In

addition, the I2C is used to read the internal status and

the power source is from the VRECT. If the wireless

function disable or in the adapter mode, the I2

C can’t

be accessed. Table 3 shows the register definition. It’s

not fixed, the registers definition can be costumed by

firmware. If user need to read other information via I2C,

please discuss with RICHTEK firmware engineer.

I2C Slave

0100010X (in binary format)

0x44 / 0x45 (hex format, include R/W bit)

LSB

MSB

0 R/W

Table 3. RT1650 Register Definition

Address

MSB

LSB

Name

Description

0x64

Vrect

Vrect (4V to 8V), unit = 15.68mV

0x66

Vout

Vout (3V to 6V), unit = 11.76mV

0x67

Iout

Iout (0A to 2A), unit = 7.84mA

0x78

last CE packet

0x79

last RP packet

0x7A

Received Power [7:0] (mW)

low byte of Received Power (mW)

0x7B

Received Power [14:8] (mW)

high byte of Received Power (mW)

0x7B

Received Power updating flag

0: Received Power is valid

1: Received Power is updating, not valid

0x10

Vout enable

0: Vout is disable

1: Vout is enable

0x02

freq_cnt[7:0]

Frequency = 1000 / ((freq_cnt[13:0] *

0.11) /128) KHz

0x03

freq_cnt[13:8]

0x7C

WPC phase status

WPC status

0:booting

1: ping phase

2: ID_CF phase

3: Negotiation phase

4: power transfer phase

GPIO Interface

The

RT1650

provides

programmable

General

Purpose Input/Output (GPIO) pin. The GPIO can be

used as an input or used as a status indicator for

different application. Before use this GPIO, user should

discuss its functions with RICHTEK and then RICHTEK

code its function into firmware.

GPIO can be programmed as an output port, be a

status indicator. For example,



To control LED flashing when Rx position search



To indicate thermal regulation is active



To indicate battery is full or charging is complete

GPIO can be programmed as input port, to connect

external signal and inform MCU. For example,



Enable/Disable the output



Enable the End Power Packet

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