DA14581_16 datasheet(6/153 Pages) DIALOG

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Datasheet

Revision 3.2

17-Jan-2017

CFR0011-120-01

6 of 153

DA14581

Bluetooth Low Energy 4.2 SoC with Optimized Boot Time

FINAL

SPI_EN

INPUT. SPI Clock enable. Mapped on Px ports

I2C Bus Interface

SDA

DIO/DIOD

INPUT/OUTPUT. I2C bus Data with open drain port. Mapped on

Px ports

SCL

DIO/DIOD

INPUT/OUTPUT. I2C bus Clock with open drain port. In open

drain mode, SCL is monitored to support bit stretching by a

slave. Mapped on Px ports.

UART Interface

UTX

OUTPUT. UART transmit data. Mapped on Px ports

URX

INPUT. UART receive data. Mapped on Px ports

URTS

OUTPUT. UART Request to Send. Mapped on Px ports

UCTS

INPUT. UART Clear to Send. Mapped on Px ports

UTX2

OUTPUT. UART 2 transmit data. Mapped on Px ports

URX2

INPUT. UART 2 receive data. Mapped on Px ports

URTS2

OUTPUT. UART 2 Request to Send. Mapped on Px ports

UCTS2

INPUT. UART 2 Clear to Send. Mapped on Px ports

Analog Interface

ADC[0]

INPUT. Analog to Digital Converter input 0. Mapped on P0[0]

ADC[1]

INPUT. Analog to Digital Converter input 1. Mapped on P0[1]

ADC[2]

INPUT. Analog to Digital Converter input 2. Mapped on P0[2]

ADC[3]

INPUT. Analog to Digital Converter input 3. Mapped on P0[3]

Radio Transceiver

RFIOp

AIO

RF input/output. Impedance 50



RFIOm

AIO

RF ground

Miscellaneous

RST

INPUT. Reset signal (active high). Must be connected to GND if

not used.

VBAT_RF

AIO

Connect to VBAT3V on the PCB

VDCDC_RF

AIO

Connect to VDCDC on the PCB

VPP

INPUT. This pin is used while OTP programming and testing.

OTP programming: VPP = 6.7 V ± 0.1 V

OTP Normal operation: leave VPP floating

Power Supply

VBAT3V

AIO

INPUT/OUTPUT. Battery connection. Used for a single coin bat-

tery (3 V). If an alkaline or a NiMH battery (1.5 V) is attached to

pin VBAT1V, this is the second output of the DC-DC converter.

VBAT1V

INPUT. Battery connection. Used for an alkaline or a NiMh bat-

tery (1.5 V). If a single coin battery (3 V) is attached to pin

VBAT3V,this pin must be connected to GND.

SWITCH

AIO

INPUT/OUTPUT. Connection for the external DC-DC converter

inductor.

VDCDC

Output of the DC-DC converter

GND

AIO

Ground

Table 1: Pin Description

Pin Name

Type

Drive

(mA)

Reset

State

Description

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