u-blox EVK-ANNA-B112, EVK-ANNA-B112C, EVK-ANNA-B112U User Manual

EVK-ANNA-B112

Evaluation Kit for ANNA-B112 Bluetooth 5 low energy
modules

User Guide



Abstract

This document describes how to set up the EVK-ANNA-B112 evaluation kit to evaluate ANNA-B112
series standalone Bluetooth®

5 low energy modules. It also describes the different options for

debugging and the development capabilities included in the evaluation board.

www.u-blox.com

UBX-18018539 - R01

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Page 2 of 29

Document Information

Title EVK-ANNA-B112

Subtitle Evaluation Kit for ANNA-B112 Bluetooth 5 low energy modules

Document type User Guide

Document number UBX-18018539

Revision and date R01 5-Jun-2018

Disclosure Restriction

This document applies to the following products:

Product name Type number Firmware version PCN reference

EVK-ANNA-B112U EVK-ANNA-B112U-00 ­EVK-ANNA-B112C EVK-ANNA-B112C-00 -

u-blox or third parties may hold intellectual property rights in the products, names, logos and designs included in this
document. Copying, reproduction, modification or disclosure to third parties of this document or any part thereof is only
permitted with the

express written permission of u-blox.

The information contained herein is provided “as is” and u

-blox assumes no liability for its use. No warranty, either express or

implied, is given, including but not limited

to, with respect to the accuracy, correctness, reliability and fitness for a particular

purpose of the information. This document may be revised by u

-blox at any time without notice. For the most recent

documents, visit www.u

-blox.com.

Copyright © u

-blox AG.

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Page 3 of 29

Contents

Document Information ................................................................................................................................ 2

Contents .......................................................................................................................................................... 3

1 Product description .............................................................................................................................. 4

1.1 Overview ........................................................................................................................................................ 4

1.2 Kit includes ................................................................................................................................................... 5

1.3 Key features ................................................................................................................................................. 5

1.4 EVK-ANNA-B112 block diagram ............................................................................................................... 6

1.5 Connectors ................................................................................................................................................... 7

1.6 Powering options ......................................................................................................................................... 7

1.6.1 Selecting the power configuration jumpers .................................................................................. 8

1.6.2 Default power, 3.3 V ........................................................................................................................... 9

1.6.3 Battery powered, 3 V ........................................................................................................................ 10

1.6.4 Battery powered with protection diode, 2.7 V ............................................................................. 10

1.6.5 External supply ................................................................................................................................... 11

1.6.6 Raspberry Pi HAT ............................................................................................................................... 11

1.7 Arduino interface .......................................................................................................................................12

1.7.1 Arduino shield compatibility ........................................................................................................... 13

1.8 Raspberry Pi compatible interface ........................................................................................................ 14

1.8.1 Powering considerations ................................................................................................................. 16

1.8.2 UART ................................................................................................................................................... 16

1.8.3 EEPROM support .............................................................................................................................. 16

1.9 Buttons and LEDs ...................................................................................................................................... 17

1.10 Disconnecting ANNA signals from board peripherals ........................................................................ 17

1.11 Software debug options .......................................................................................................................... 19

2 Setting up the evaluation board .................................................................................................... 20

2.1 Evaluation board setup ............................................................................................................................ 20

2.2 Starting up ................................................................................................................................................. 20

2.2.1 EVK-ANNA-B112 ................................................................................................................................ 20

2.2.2 EVK-ANNA-B112 SDK ....................................................................................................................... 20

2.3 Getting the latest software .................................................................................................................... 20

Appendix ........................................................................................................................................................ 21

A Placement and Schematics .............................................................................................................. 21

B Glossary .................................................................................................................................................. 27

Related documents ................................................................................................................................... 28

Revision history .......................................................................................................................................... 28

Contact ...........................................................................................................................................................29

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 4 of 29

1 Product description

1.1 Overview

The u-blox EVK-ANNA-B112 evaluation kit is a versatile development platform that allows quick
prototyping of a variety of extremely low-power Internet of Things (IoT) applications, using Bluetooth
5, Bluetooth mesh and NFC.

The u-blox EVK-ANNA-B112 boards are available in the following two variants depending on the
required antenna:

• EVK-ANNA-B112U, with an ANNA-B112U module including u-blox connectivity software, and an
antenna connector for connecting to external antennas

• EVK-ANNA-B112C, with an ANNA-B112C module including u-blox connectivity software and an
internal antenna (a unique 2.4 GHz antenna in the SIP).

The evaluation board provides access to all 25 IO pins and interfaces available on the
ANNA-B112 modules through a variety of connectors and interfaces, including Arduino™ Uno R3 and
Raspberry Pi header connectors.

The stand-alone ANNA-B112 is based on the Nordic Semiconductor nRF52832 chip. The nRF52832
uses an Arm

®

Cortex®-M4F microcontroller with 512 kB internal flash and 64 kB RAM, running at a
system clock of 64 MHz. The evaulation board provides simple USB drag-n-drop programming and a
SEGGER J-Link debug interface that can be used with the open CPU variants of the EVK. Nordic
provides a free Software Development Kit (SDK) with a broad selection of drivers, libraries, and
example applications that can be used for rapid prototyping.

Figure 1: EVK-ANNA-B112 evaluation boards

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 5 of 29

Figure 2: Left: EVB ANNA-B112U including U.FL connector; Right: EVB ANNA-B112C including an internal antenna.

Figure 3: Left: EVB ANNA-B112U including NFC antenna; Right: EVB ANNA-B112U including NFC antenna, turned 180
degrees. Both options are valid.

1.2 Kit includes

The EVK-ANNA-B112 evaluation kit includes the following:

• EVK-ANNA-B112 evaluation board

• 2.4 GHz external antenna with U.FL connector (only in EVK-ANNA-B112U)

• NFC antenna

• USB cable

• Quick Start card

1.3 Key features

• u-blox ANNA-B112 Bluetooth low energy module based on the Nordic nRF52832 chipset:

o Bluetooth 5 support
o Bluetooth mesh
o NFC tag functionality
o Integrated Arm® Cortex®-M4F microcontroller with 512 kB flash, 64 kB RAM, and 64

MHz system clock

o Wide 1.7-3.6 V supply range

• The ANNA-B112 module supports different interfaces that can be configured to any of the 25

available IO pin(s):

o 8 analog capable inputs

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 6 of 29

o 12 PWM capable outputs
o 3x SPI
o 1x UART with HW flow control
o 2x I

2

C

o 1x I

2

S

• Full UART to USB converter with a Virtual COM port that allows control of the extended UART

features of the u-blox connectivity software

• On-board J-Link debugger/programmer:

o Mass Storage Device interface to PC, for drag-n-drop programming
o Debug port
o An additional Virtual COM port that, for example, may be connected to add-on boards

or to a debug UART on the ANNA-B112

• RGB LED and push buttons

• Arduino UNO R3 and Raspberry Pi compatible pin header interfaces

• Jumper headers and level shifters allow for flexible powering options of the ANNA-B112 module,

even with full board support. They isolate the module entirely and control each power net
separately in order to precisely measure low power applications or disconnect only unused parts
of the board to save battery life.

• Multiple board power supply options:

o 5-12 V power plug
o 5 V USB supply
o 5-12 V Arduino VIN input

• Battery holder supporting CR2032 coin cell batteries

1.4 EVK-ANNA-B112 block diagram

The block diagram of EVK-ANNA-B112 is shown in Figure 4.

Figure 4: EVK-ANNA-B112 block diagram

The block diagram shows the major interfaces and internal connections of the EVK-ANNA-B112. The
following sections describe in detail how the different interfaces are connected and used, and how
the evaluation board may be configured to suit the needs of the user.

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 7 of 29

1.5 Connectors

Figure 5 shows the available connectors on the EVK-ANNA-B112 and their layout. Table 1 describes
the connectors and their uses in detail.

Figure 5: Available connectors and their pinout

Connector
annotation

Function Description

J5 Power supply 2.1 mm power jack, the center pin is the positive terminal. 5 – 12 V input.

J17 Power supply Pin header that can be used to connect external power supplies. 5 – 12 V input.

BT1 Battery holder

CR2032 coin cell battery holder. CR2032 usually has a 3 V potential when fully
charged.

J11

NFC antenna
connector

Pin header that connects to the u-blox NFC antenna included in the kit.

J10

2.4 GHz RF antenna
connector

U.FL coaxial connector that can be used to connect antennas or RF equipment. This
connector is included only in the EVK-ANNA-B112U.

J12

Cortex Debug
connector

10-pin, 50 mil pitch connector that can be used to connect external debuggers to
the ANNA-B112 module. The ANNA-B112 modules support Serial Wire debug (SWD)
and Serial Wire Viewer, but not JTAG debug.

J21

Cortex Debug+ETM
connector

20-pin, 50 mil pitch connector. This extended connector has the same features as
J12, but also allows for instruction trace operations via the Embedded Trace
Macrocell (ETM) of the Cortex

®

-M4F microcontroller inside the ANNA-B112 module.
This requires a special external debugger. Note that the 50 mil pitch pin header is
not soldered onto the evaluation board by default.

J8

Power supply, COM
port and debug USB

The main USB connector that is used to program, debug, and communicate with the
ANNA-B112 module. It can also be used to power the entire board.

Table 1: EVK-ANNA-B112 connector description

1.6 Powering options

Power can be supplied to the board in one of the following ways:

• Via the USB connector, J8

• Using the power jack, J5

• Using the Arduino interface VIN pin

• Using the pin header J17

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 8 of 29

• Plugging in a battery to the battery holder BT1

These power supply sources are distributed to the rest of the board as shown in Figure 6.

Figure 6: Block diagram of the power net distribution

1.6.1 Selecting the power configuration jumpers

The EVK-ANNA-B112 offers flexible powering options for the ANNA-B112 module and the board itself.
To configure this, jumpers are added to or removed from pin headers, shorting two of the pins
together and connecting or disconnecting different power nets on the evaluation board. Figure 7
shows the location of the power configuration jumper headers. The 3V3 net is supplied by the board
and will always be powered as long as any of the power sources shown in Figure 6 are connected. The
3V3 net will not provide power unless a jumper is added to jumper header J7.

Figure 7: Jumper headers J7 and J22 are used to select power configurations

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 9 of 29

Connector
annotation

Pin
number

Schematic
net name

Description

J7 1 3V3

Regulated 3.3 V net. This net is supplied by the board and will always be powered
as long as a power source is connected.

2 3V3_PI

Connects to the Raspberry Pi header’s (J14) 3V3 pins. If a Raspberry Pi is
connected, this net must be floating to prevent back currents. If a HAT is
connected, this net can be shorted to the EVK 3.3 V supply to power the HAT.

3 VBAT_DIODE

To protect the battery from current back surges, connect the battery to the
ANNA-B112 module via a protection diode using this pin.

4 VDD_ANNA

Connects to J22 pin 3, from where it can be connected to the module supply pin or
somewhere else.

5 VBAT Battery + terminal

6 VDD_ANNA

Connects to J22 pin 3, from where it can be connected to the module supply pin or
somewhere else.

7 3V3

Regulated 3.3 V net. This net is supplied by the board and will always be powered
as long as a power source is connected.

8 VDD_ANNA

Connects to J22 pin 3, from where it can be connected to the module supply pin or
somewhere else.

9 3V3

Regulated 3.3 V net. This net is supplied by the board and will always be powered
as long as a power source is connected.

10 VDD_MCU

Supply net for the board functions not directly connected to the ANNA-B112
module; Interface MCU, USB hub, UART to USB converter etc.

11 GND Ground net.

12 GND Ground net.

J22 1 VCC

ANNA-B112 module voltage supply that connects to the module VCC pin. Shorted
to the VCC_IO net via 0 Ω resistor R4 by default.

2 VCC_IO VCC_IO pin not connected.

3 VDD_ANNA

Connects to J7 pins 4, 6 and 8. Short J22 pins 1 and 3 allow the EVK to power the
ANNA-B112 module.

4 VDD_IO

Supply net for LEDs and peripherals connected directly to the ANNA-B112 module.
Short J22 pins 2 and 4.

5 GND Ground net.

6 GND Ground net.

Table 2: Pinout of jumper headers J7 and J22 used to configure the board power nets

The following sections describe different jumper configurations and power scenarios that is available
on the board, including the default configuration.

⚠ Check the jumper positions carefully; if a jumper is connected in a wrong way, it can permanently

damage the components that are on the board or connected to it.

1.6.2 Default power, 3.3 V

This is the default power configuration for the evaluation board, and the jumpers are installed out of
the box with this power configuration. All board peripherals are powered up, the ANNA module is
directly supplied by the board and everything is running at 3.3 V.

Figure 8: Jumper positions for default power configuration

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 10 of 29

Connector
annotation

Add jumper
to pins

Description

J7 7, 8 Selects the board regulated 3.3 V net as source for the VDD_ANNA net.

9, 10 Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V.

J22 1, 3

Powers up the ANNA module. The ANNA VCC and VCC_IO pins are connected to the selected
source for the VDD_ANNA net.

2, 4

Powers up the peripherals directly connected to ANNA such as LEDs and external memory
with the ANNA supply voltage.

Table 3: Jumper positions for default power configuration

1.6.3 Battery powered, 3 V

When using a battery, Figure 9 shows the default configuration. The battery voltage is connected to
VDD_ANNA, which in turn, is connected to the ANNA-B112 VCC supply. If needed, a jumper can be
added to J22 pins 2 and 4 to supply LEDs and other peripherals with power, as long as this does not
exceed the maximum current rating of the battery. If the ANNA module has to be configured, the
VDD_MCU net can be connected to enable PC communications by adding a jumper to J7 pins 9 and

10.

Figure 9: Jumper positions for battery powered operation, two jumpers are optional

Connector
annotation

Add jumper
to pins

Description

J7 5, 6 Selects the battery connected to the battery holder as source for the VDD_ANNA net.

9, 10 (Optional) Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V.

J22 1, 3

Powers up the ANNA module. The ANNA VCC and VCC_IO pins are connected to the selected
source for the VDD_ANNA net.

2, 4

(Optional) Powers up the peripherals directly connected to ANNA such as LEDs and external
memory with the ANNA supply voltage.

Table 4: Jumper positions for battery powered operation, two jumpers are optional

1.6.4 Battery powered with protection diode, 2.7 V

This use case is meant to protect the battery from current back surges. When using the NFC
interface, there is a risk that the applied electromagnetic field can cause back surges that will
typically damage a non-chargeable battery. To prevent this damage, a schottky diode can be added
in series to the battery, which will block any back current surges. A jumper should then be added to
J7 pins - 3 and 4 instead of 5 and 6.

The diode will lower the voltage level of the battery by about 0.3 V.

Figure 10: Jumper positions for battery powered operation with a protection diode, two jumpers are optional

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 11 of 29

Connector
annotation

Add jumper
to pins

Description

J7 3, 4 Selects the diode protected battery as a source for the VDD_ANNA net.

9, 10 (Optional) Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V.

J22 1, 3

Powers up the ANNA module. The ANNA VCC and VCC_IO pins are connected to the selected
source for the VDD_ANNA net.

2, 4

(Optional) Powers up the peripherals directly connected to ANNA such as LEDs and external
memory with the ANNA supply voltage.

Table 5: Jumper positions for battery powered operation with a protection diode, two jumpers are optional

1.6.5 External supply

When measuring current consumption or performing other ANNA-B112 module characterization
measurements, it can be useful to power the module with an external source such as a DC power
analyzer. In such a case, all jumpers can be removed and the required supply nets can be fed
externally by connecting to the pin headers. For example, the ANNA-B112 module can be powered by
connecting an external supply directly to the J22 pin 1 and GND.

☞ Take care that unpowered parts of the board are properly isolated. If a voltage is applied to the

signal of an unpowered device, current might leak through various protection circuits of the
device. This might give false readings when measuring current consumption etc.

Figure 11 below shows a few optional jumper connections that can be helpful when supplying the
module with an external supply.

Figure 11: Optional jumper positons while using an external power supply

Connector
annotation

Add jumper
to pins

Description

J7 7, 8 (Optional) Selects the board regulated 3.3 V net as a source for the VDD_ANNA net.

9, 10 (Optional) Powers up the interface MCU, USB hub, and UART to USB converter with 3.3 V.

J22 3, 4

(Optional) Powers up the peripherals directly connected to ANNA such as LEDs
and external memory with the selected source for the VDD_ANNA net.

Table 6: Optional jumper positons while using an external supply

1.6.6 Raspberry Pi HAT

When connecting a HAT to the Raspberry Pi interface, the following jumper configuration can be
used. Depending on how the ANNA module should communicate with a test PC over USB or with the
HAT, the VDD_MCU net can be left unpowered.

The 3V3_PI supply net must only be powered when connecting to a Raspberry Pi expansion board

(HAT). If connecting to a Raspberry Pi board, the jumper must be disconnected.

Figure 12: Jumper configuration when connected to a Raspberry Pi HAT

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 12 of 29

Connector
annotation

Add jumper
to pins

Description

J7 1,2 Connects the 3V3_PI net to the regulated 3.3 V supply.

7, 8 Selects the board regulated 3.3 V net as a source for the VDD_ANNA net.

9, 10 (Optional) Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V.

J22 1, 3

Powers up the ANNA module. The ANNA VCC and VCC_IO pins are connected to the selected
source for the VDD_ANNA net.

2, 4

(Optional) Powers up the peripherals directly connected to ANNA such as LEDs and external
memory with the ANNA supply voltage.

Table 7: Jumper configuration when connected to a Raspberry Pi HAT

1.7 Arduino interface

The EVK-ANNA-B112 includes a set of pin headers and mounting holes that are compatible with
certain Arduino or Arduino inspired shields. Figure 13 shows the layout of the Arduino interface and
Table 8 explains the pinout in more detail. Section 1.7.1 describes what specifications must be met
for a shield to be compatible for use with the EVK-ANNA-B112.

☞ The silk screen text on EVB marked UBXH60-0000474 J3 pin 6 shall be IO_31.

Figure 13: Pin headers that are compatible with some Arduino shields

Conn.

Pin
No.

Arduino
pin

Description

Schematic
net name

nRF52
pin

u-blox connectivity and alternate
functions with notes

J1 1 N/C Not Connected - - Not connected

2 IOREF

I/O reference voltage level.
Selectable by user to 1.7 – 3.6 V

VDD_IO - See section 1.6

3 RESET Reset signal input. Active low logic RESET_N P0.21

4 3.3V 3.3 V DC regulated supply output 3V3 -

5 5V 5 V regulated supply output 5V -

Cannot be used as supply input, use
VIN instead. Only supplied by USB
VBUS.

6 GND Ground GND GND

7 GND Ground GND GND

8 VIN External DC supply input, 5 – 12 VDC VIN -

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 13 of 29

J2 1 A0 Analog input IO_24 P0.04 Analog function capable IO

2 A1 Analog input IO_23 P0.05 Analog function capable IO

3 A2 Analog input IO_28 P0.28 Analog function capable IO

4 A3 Analog input IO_27 P0.29 Analog function capable IO

5 A4 Analog input

UART_DSR/
IO_26

P0.30

Analog function capable IO,
UART_DSR signal on ANNA-B1

6 A5 Analog input

UART_DTR/

IO_25

P0.31

Analog function capable IO,
UART_DTR signal on ANNA-B1

J3 1 D0/RX Digital I/O, UART RX UART_RXD P0.02 UART_RXD signal on ANNA-B1

2 D1/TX Digital I/O, UART TX UART_TXD P0.03 UART_TXD signal on ANNA-B1

3 D2 Digital I/O UART_CTS P0.19 UART_CTS signal on ANNA-B1

4 D3 Digital I/O UART_RTS P0.11 UART_RTS signal on ANNA-B1

5 D4 Digital I/O IO_29 P0.27 RED

6 D5 Digital I/O IO_31 P0.26 BLUE

7 D6 Digital I/O IO_22 P0.10

Signal not connected by defualt,
configured for NFC use

8 D7 Digital I/O IO_21 P0.09

Signal not connected by defualt,
configured for NFC use

J4 1 D8 Digital I/O IO_13 P0.14

2 D9 Digital I/O IO_38 P0.24

SWITCH_2 on ANNA-B1.
This signal is pulled low when the
button SW2 is pressed

3 D10 Digital I/O IO_36 P0.22

4 D11 Digital I/O IO_37 P0.23

5 D12 Digital I/O IO_16 P0.18

6 D13 Digital I/O IO_45 P0.20

7 GND Ground GND

8 AREF Analog reference voltage level - - Not connected

9 SDA I2C data signal IO_14 P0.15

10 SCL I2C clock signal IO_15 P0.16

Table 8: Pinout of the Arduino UNO R3 compatible interface

1.7.1 Arduino shield compatibility

The EVK-ANNA-B112 has an I/O voltage range of 1.7-3.6 V. It can therefore be used only with shields
that also support an I/O voltage within this range.

The EVK-ANNA-B112 has a pinout that is compatible with some Arduino or Arduino inspired shields.
This section describes the features of the EVK pins that a shield must comply with:

• IOREF: The I/O voltage level of the ANNA-B112 module is 3.3 V by default, but the EVK can be
modified to allow other voltages (1.7-3.6 V).

• RESET: Is connected to the RESET button (SW0).

• 3.3 V: A regulated 3.3 V output. Should not be used as a voltage supply input, use the VIN pin

instead.

• 5 V: Is only a 5 V supply output if the EVK is being powered by USB. If any other power
configuration is used, this pin will be unconnected (floating). It is safe to connect an external 5 V
supply to this pin even when a USB cable is connected. This pin cannot be used to power the
board, use the VIN pin instead.

• VIN: May be used as a 5 -12 V supply input to power the EVK-ANNA-B112.

• Pin 0 (RX): Is connected to the ANNA-B112 UART RX pin (ANNA pin 23).

• Pin 1 (TX): Is connected to the ANNA-B112 UART TX pin (ANNA pin 22).

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 14 of 29

Note on SCL/SDA: On some Arduino boards, the I2C signals, SCL, and SDA are connected to the pins
A4 and A5 and to the SCL and SDA pins in the top right hand corner. Since these pins will be shorted
together it might cause problems when connected to the EVK-ANNA-B112, which has not shorted
these pins together.

Note on digital I/O pins: Some of the digital I/O pins can be connected to the on-board debug MCU,
thus allowing serial communication and flashing/debugging over USB. This can cause interference
on the signals that are also used by an Arduino shield. See section 1.10 on how to disconnect these
signals from the debug MCU.

1.8 Raspberry Pi compatible interface

The EVK-ANNA-B112 includes a 40-pin IO header that can be used to interface with either a
Raspberry Pi computer board or with a Raspberry Pi expansion board (HAT). The EVK-ANNA-B112
uses different hardware and software configurations depending on if it is connected to a Pi or a HAT;
the differences are covered in this section. The default configuration is to connect to a Pi.

Not all the Raspberry Pi versions and HATs are supported, since it requires the 40-pin IO header,
which older versions did not have. Table 9 lists the compatible Raspberry Pi versions.

Compatible Raspberry Pi boards

Raspberry Pi 1 Model A+

Raspberry Pi 1 Model B+

Raspberry Pi 2 Model B

Raspberry Pi 3 Model B

Raspberry Pi Zero

Raspberry Pi Zero W

Table 9: Compatible Raspberry Pi boards

Figure 14: Pin header J14 that is compatible with the Raspberry Pi IO connectors

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 15 of 29

Figure 14 shows the layout of the Raspberry Pi interface and Table 10 explains the pinout in detail.
There are three mounting holes that can be used for increased mechanical stability. The two on
either side of connector J14 are common to all Raspberry Pi boards, but the third one is only
compatible with the Pi Zero boards.

Conn.

Pin
No.

Raspberry
Pi pin

Description

Schematic
net name

nRF52
pin

Alternate functions and notes

J14 1 3.3 V 3.3 V supply pin 3V3_PI - Not connected by default, see section 1.6

2 5 V 5 V supply pin 5V -

Cannot be used as supply input. Supplied
by USB VBUS and protected from back
powering.

3 IO02 Digital I/O IO_14 P0.15

4 5 V 5 V supply pin 5V -

Cannot be used as supply input. Supplied
by USB VBUS and protected from back
powering.

5 IO03 Digital I/O IO_15 P0.16

6 GND Ground GND GND

7 IO04 Digital I/O N/C

8 IO14 Digital I/O, UART TX/RX RASP_TXD P0.02

Connected to ANNA UART_RXD pin by
default, see section 1.8.2

9 GND Ground GND GND

10 IO15 Digital I/O, UART RX/TX RASP_RXD P0.03

Connected to ANNA UART_TXD pin by
default, see section 1.8.2

11 IO17 Digital I/O N/C

12 IO18 Digital I/O RESET_N P0.21

13 IO27 Digital I/O IO_13 P0.14

14 GND Ground GND GND

15 IO22 Digital I/O IO_17

Can be connected to IO_17 via zero
Ωresistor. Resistor not mounted by
default. IO_17 is connected to 32.768 LPO
crystal by default

16 IO23 Digital I/O IO_16 P0.18

17 3.3 V 3.3 V supply pin 3V3_PI - Not connected by default, see section 1.6

18 IO24 Digital I/O IO_18

19 IO10 Digital I/O IO_25 P0.31

20 GND Ground GND GND

21 IO09 Digital I/O IO_21 P0.09

Can be connected to IO_21 via zero Ω
resistor. Resistor not mounted by default.
IO_21 is connected to NFC antenna by
default

22 IO25 Digital I/O IO_22 P0.10

Can be connected to IO_22 via zero Ω
resistor. Resistor not mounted by default.
IO_22 is connected to NFC antenna by
default

23 IO11 Digital I/O IO_23 P0.05

24 IO08 Digital I/O IO_24 P0.04

25 GND Ground GND GND

26 IO07 Digital I/O IO_26 P0.30

27 ID_SD

EEPROM config I2C data
signal

IO_27 P0.29

Should only be used to read or simulate
HAT EEPROMs, see section 1.8.3

28 ID_SC

EEPROM config I2C clock
signal

IO_28 P0.28

Should only be used to read or simulate
HAT EEPROMs, see section 1.8.3

29 IO05 Digital I/O IO_29 P0.27

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 16 of 29

Conn.

Pin
No.

Raspberry
Pi pin

Description

Schematic
net name

nRF52
pin

Alternate functions and notes

30 GND Ground GND GND

31 IO06 Digital I/O IO_31 P0.26

32 IO12 Digital I/O IO_30 P0.25

33 IO13 Digital I/O UART_RTS P0.11

34 GND Ground GND GND

35 IO19 Digital I/O UART_CTS P0.19

36 IO16 Digital I/O IO_36 P0.22

37 IO26 Digital I/O IO_37 P0.23

38 IO20 Digital I/O IO_38 P0.24

39 GND Ground GND GND

40 IO21 Digital I/O IO_45 P0.20

Table 10: Pinout of the Raspberry Pi compatible interface

1.8.1 Powering considerations

There are two voltage nets used in the Raspberry Pi interface 3V3_PI and 5V. Both the 3V3_PI and
5V nets can be used to power HATs, but should not be used when connecting to a Raspberry Pi. See
section 1.6.6 for more information.

⚠ The 3V3_PI power net must not be connected to the 3.3 V supply when connected to a Raspberry

Pi board. It could damage both the boards.

1.8.2 UART

The Raspberry Pi interface provides two pins - IO14 and IO15, which can be used for UART
communications. In UART communications, signals are always connected RX <-> TX and vice versa.
This means that on a Raspberry Pi board IO14 will be TX and on a HAT it will be RX. To support talking
to both HATs and Pi boards, the zero Ω resistors - R57, R58, R59 and R60 can be used to toggle the
ANNA TX and RX pins between IO14 and IO15. If an ANNA-B112 is used, this switch can also be made
in the software. By default, the EVK-ANNA-B112 will be configured to simulate a HAT, and IO14 is
connected to the ANNA UART_RXD pin and IO15 is connected to the ANNA UART_TXD pin
respectively.

1.8.3 EEPROM support

The Raspberry Pi interface supports a unique EEPROM solution to store the HAT specific IO
configurations on the HAT board, to be read by the Raspberry Pi before configuring its IOs. The two
pins used for this are ID_SD and ID_SC and are connected to the ANNA-B112 module. The
ANNA-B112 module can thus either read the IO configuration from a HAT, or simulate an EEPROM
and send configurations to a connected Pi. This requires an ANNA-B112 module and a custom built
application.

It is not mandatory to use this EEPROM solution; if not used, the two ANNA pins - IO_42 and IO_41
can be without configurations.

Two pull-up resistors - R44 and R50, can be added to the I

2

C lines if needed. They are not mounted

on the evaluation board by default.

Visit https://github.com/raspberrypi/hats/blob/master/designguide.md for more information on the
ID EEPROM specification.

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 17 of 29

1.9 Buttons and LEDs

Figure 15: Position of the push-buttons and LEDs on the evaluation board

Annotation Function Description

SW0 Reset button Connected directly to the ANNA RESET_N pin.

SW1 User button

Push button for application use. Connected directly to the ANNA SWITCH_1
(IO_30) pin

SW2 User button

Push button for application use. Connected directly to the ANNA SWITCH_2
(IO_38) pin

Table 11: EVK-ANNA-B112 buttons

Annotation Function Description Color

DS1 UART CTS LED Connected to the ANNA UART_CTS (IO_35) pin via jumper header J9

DS2 UART RTS LED Connected to the ANNA UART_RTS (IO_34) pin via jumper header J9

DS3 Interface MCU LED

Blinks on USB enumeration and activity, lit when the Interface MCU is
connected via USB

DS4 Interface MCU LED Error LED

DS5 UART DTR LED Connected to the ANNA UART_DTR (IO_25) pin via jumper header J9

DS6 UART DSR LED Connected to the ANNA UART_DSR (IO_26) pin via jumper header J9

DS7 UART RXD LED Connected to the ANNA UART_RXD (IO_20 pin via jumper header J9

DS8 UART TXD LED Connected to the ANNA UART_TXD (IO_19) pin via jumper header J9

DS9 RGB LED

Connected to the ANNA RED (IO_29), GREEN (IO_30) and BLUE (IO_31)
pins via jumper header J19

Table 12: EVK-ANNA-B112 LED indicators

1.10 Disconnecting ANNA signals from board peripherals

All evaluation board peripherals, such as level shifters, LEDs, and the interface MCU will be
connected to the ANNA-B112 module by default. This might not suit all evaluation scenarios. All
peripherals can be switched off by disconnecting their power supplies (see section 1.6), but if only
specific signals have to be isolated, it will require finer control.

All the ANNA module signals that are connected to board peripherals have thus been routed via
jumper headers, so that jumpers can be pulled or added as needed by the evaluation board user,
isolating, or connecting specific signals. Figure 16 shows the layout of these jumper headers.

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 18 of 29

Figure 16: Jumper headers J19 and J9 that are used to isolate specific ANNA signals

Connector
annotation

Pin number

Schematic net
name

Description

J19 1 RESET_N Reset signal, active low

2 RESET_N_I Connects to the Interface MCU’s reset line

3 SWDIO SWD data signal

4 SWDIO_I

Interface MCU SWD data signal, used to program/debug the ANNA
module

5 SWDCLK SWD clock signal

6 SWDCLK_I

Interface MCU SWD data signal, used to program/debug the ANNA
module

7 IO_31 ANNA-B112: BLUE signal

8 BLUE RGB diode blue signal, active low

9

IO30/
SWITCH_1

ANNA-B112: SWITCH_1 and GREEN signal

10 GREEN RGB diode green signal, active low

11 IO_29 ANNA-B112: RED signal

12 RED RGB diode red signal, active low

J9 1

IO_25/
UART_DTR

ANNA-B112: UART DTR output

2 UART_DTR_I UART to USB DTR signal

3

IO_26/
UART_DSR

ANNA-B112: UART DSR input

4 UART_DSR_I UART to USB DSR signal

5

IO_34/
UART_RTS

ANNA-B112: UART RTS output

6 UART_RTS_I UART to USB RTS signal

7

IO_35/
UART_CTS

ANNA-B112: UART CTS input

8 UART_CTS_I UART to USB CTS signal

9

IO_19/
UART_TXD

ANNA-B112: UART TXD output

10 UART_TXD_I UART to USB TXD signal

11

IO_20/
UART_RXD

ANNA-B112: UART RXD input

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Product description
Page 19 of 29

Connector
annotation

Pin number

Schematic net
name

Description

12 UART_RXD_I UART to USB RXD signal

Table 13: Pinout of jumper headers - J19 and J9

1.11 Software debug options

You can debug the software using the following two options in EVK-ANNA-B112:

• Onboard debug solution available on the USB connector

• An external debugger connected to J12 connector

An external debugger connected to the J12 connector is useful when powering the evaluation board
with the CR2032 coin cell battery, or through the external power supply connector J5. It could also
be useful in a scenario where the debug MCU interface has been disconnected from the ANNA-B112
module using the jumpers on J9 header. The SEGGER J-Link software [4] is required to debug using
the onboard J-Link hardware on the EVK-ANNA-B112.

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Setting up the evaluation board
Page 20 of 29

2 Setting up the evaluation board

2.1 Evaluation board setup

The EVK-ANNA-B112 will be delivered with u-blox connectivity software installed.

Before connecting the module, download, and install the latest u-blox s-center evaluation software
from the u-blox website.

To use Bluetooth Low Energy on the EVK-ANNA-B112, connect a 2.4 GHz antenna to the U.FL
antenna connector (J10). The EVK-ANNA-B112C has an onboard antenna.

Plug in either an external power supply in J5 connector or connect to a USB host with a USB cable
attached to J8 connector. You can also power the evaluation board with a CR2032 coin cell battery.
The status light (DS6) will turn green, indicating it has power. The NFC antenna can be connected to
the J11 connector. Both ways of board connection are possible, rotation of 180 degrees.

⚠ Be careful to check polarity before connecting an external power supply to the EVK-ANNA-B112

evaluation board. Center conductor is positive (+) and the ring is negative (-).

The very first time you connect the unit to a new computer, drivers need to be installed. The
operating system should handle this automatically.

⚠ If the drivers are not installed automatically, download the nRFgo Studio from

www.nordicsemi.com to get the Jlink CDC UART driver.

A COM port will automatically be assigned to the unit by Windows. Do the following to view the
assigned COM ports on Windows 7:

• Open the Control Panel and click Hardware and Sound.

• Click Device Manager in Devices and Printers. This will open Device Manager window where you

can view the assigned COM ports.

2.2 Starting up

2.2.1 EVK-ANNA-B112

Perform the following steps to enable communication with the module:

1. Start the u-blox s-center evaluation software.

2. Use the default baudrate 115200, 8N1 with flow control.

3. You will now be able to communicate with the module through AT commands.

For a list of available AT commands, see the u-blox Short Range AT Commands Manual [3]. To get
started with a basic use case setup of the EVK-ANNA-B112 with u-blox connectivity software, see the
ANNA-B112 Getting Started [5].

2.2.2 EVK-ANNA-B112 SDK

If you would like to use the EVK-ANNA-B112 together with the Nordic Semiconductor SDK, refer to
the Software section of the ANNA-B112 System Integration Manual [2].

2.3 Getting the latest software

Go to the u-blox support webpage to obtain the latest available firmware. Instructions on flashing
the EVK-ANNA-B112 can be found in the Software section of the ANNA-B112 System Integration
Manual [2].

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Setting up the evaluation board
Page 21 of 29

Appendix

A Placement and Schematics

Top view Bottom view

BOM_ ANT_C ORNE R:AN NA-B 1WITH INTERN AL ANTE NNA MOU NTED IN A CORNER

(ONL Y ON E OP TION SETUP I S MO UNTE D)

BOM_ ANT_C ONNE CTOR :ANN A-B1WITH A COAX CONNEC TOR

BOM_ ANT_E DGE: ANNA -B1WI TH INTERN AL ANTE NNA MOU NTED ON A EDGE SIDE

(TRACE_C LK)

(TRACE_D 3)

(TRACE_D 2)

(TRACE_D 3)

NFC ANTE NNA
CONN ECTO R

(TRACE_ D2)

(TRACE_D 2)

(TRACE_D 1)

LEVE L SH IFTE RS

ANNA IN A CO RNER

JUMP ER HEA DERS USED TO CONNECT
GPIO S TO VAR IOUS BOARD FUNCTIO NS
ALL POSI STION S M OUNT ED BY DEFA ULT

CURR ENT MEA SURE MENT

(TRACE_D 1)

(TRACE_C LK)

ANNA WIT H COAX C ONNECTOR

(TRACE_C LK)

(TRACE_ D0)
(TRACE_ D1)

(TRACE_ D3)

TO INTE RFACE MCU

TO F TDI CHIP

(TRACE_D 0)

(TRACE_D 0)

PRO DUC T VA RIANT S

TWO ANNA -B1 PLA CEME NT OPTION S FOR INTER NAL ANT ENNA

ANNA IN A ED GE

POSS IBILI TY T O SEPAR ATE RESE T

32.768KH Z_XL2_CO RNER

VCC

100N

mwej

B

SWDCLK

RESET_MO DULE_N

Fri Fe b 16 12: 12:2 4 2018

PAGE 1 O F 6

EVB- ANNA -B1

u-bl ox AG $Cha nge: 6053 27

02

NFC_2_CO RNER

IO_28

IO_38

IO_31

IO_30

IO_29

IO_36

IO_37

ANT_HOST _CORNER

ANT_INT_ CORNER

0R

IO_24

IO_18

0R

0R

5%

100N

32.768KH Z_XL1_ED GE

32.768KH Z_XL2_ED GE

DNI0RDNI

UART_RXD
UART_TXD
UART_CTS

VCC

NFC_1_CO NNECTOR

0R

0R

NFC_2_CO RNER

IO_26

IO_23

ANT_INT_ EDGE

UART_RTS

ANNA MODULE

NFC_1_ED GE

NFC_2_ED GE

32.768KH Z_XL1_CO RNER

DNI

IO_14

IO_15

IO_16

IO_37

IO_29

RESET_MO DULE_N

IO_26

SWDIO_LV L

VDD_IO

0R

IO_45
IO_16
IO_15

IO_13

SWDIO

DNI

NFC_1_CO RNER

0R

NFC_1_CO RNER

100N

NFC_2_ED GE

IO_13

32.768KHZ

32.768KH Z_XL2_CO NNECTOR

IO_30

330P

10%

NFC_2

DNI

NFC_1

DNI

NFC_1_CO NNECTOR

NFC_2_CO NNECTOR

ANT_EXT

SWDCLK

IO_24

IO_31

UART_RXD

RESET_N

IO_21

SWDCLK_I

IO_16

IO_22

0R

10%

VCC

0R

10%

330P

330P

RESET_N_ I

UART_DTR _I

RESET_MO DULE_N

0R

DNI

10K

5%

IO_37

SWDCLK

RESET_MO DULE_N

IO_14

IO_36
IO_29

IO_25

IO_26

IO_23

IO_27

IO_28

IO_38

IO_30
IO_31

UART_TXD

IO_45

DNI

DNI

0R

5%

22P

0R

UART_TXD

0R

DNI

32.768KHZ

RESET_N_ LVL

VDD_MCU

IO_30

IO_31

SWDCLK

RESET_N
SWDIO

RED

GREEN

BLUE

SWDCLK_I

IO_29

RESET_N_ I
SWDIO_I

UART_TXD

UART_CTS

UART_RTS

IO_25
IO_26

UART_RXD _I

UART_TXD _I

UART_CTS _I

UART_RTS _I

UART_RXD

UART_DTR _I
UART_DSR _I

VCC_IO

VCC

VDD_ANNA

UART_DTR _LVL
UART_DSR _LVL

SWO_LVL

SWDCLK_L VL

IO_17

0R

IO_17

32.768KH Z_XL1_CO NNECTOR

IO_13

SWDIO

UART_RXD

UART_CTS
UART_RTS

IO_25

IO_27

IO_24

IO_38

IO_28
IO_27

IO_23

IO_25

UART_RTS

UART_CTS

IO_36

0R

UART_RXD _I

UART_TXD _I

IO_16

DNI

10%

100N

100N

UART_RTS _LVL

UART_TXD _LVL

UART_CTS _LVL

UART_RXD _LVL

100N

100N

10%

10%

DNI

22P

10%

UART_DSR _I

5%

IO_18
IO_17

5%

UART_RTS _I
UART_CTS _I

0R

22P22P

IO_18

22P

5%

32.768KHZ

22P

NFC_1_ED GE

VCC

IO_45

IO_14

IO_15

SWDIO_I

VDD_IO

NFC_2_CO NNECTOR

SWDIO

GND_10IO_31

IO_30

IO_38

IO_28

IO_27

IO_24

IO_23

IO_26

IO_25

IO_29

UART_RTS

UART_CTS

UART_TXD

UART_RXD

IO_36

GND_7

VCC

ANT_GND_1

ANT_GND_2

GND_4

GND_8

GND_49

GND_51

GND_52

GND_11

ANT

IO_37 ANT_PCB

ANT_INT

GND_10IO_31

IO_30

IO_38

IO_28

IO_27

IO_24

IO_23

IO_26

IO_25

IO_29

UART_RTS

UART_CTS

UART_TXD

UART_RXD

IO_36

GND_7

VCC

ANT_GND_1

ANT_GND_2

GND_4

GND_8

GND_49

GND_51

GND_52

GND_11

ANT

IO_37 ANT_PCB

ANT_INT

GND_10IO_31

IO_30

IO_38

IO_28

IO_27

IO_24

IO_23

IO_26

IO_25

IO_29

UART_RTS

UART_CTS

UART_TXD

UART_RXD

IO_36

GND_7

VCC

ANT_GND_1

ANT_GND_2

GND_4

GND_8

GND_49

GND_51

GND_52

GND_11

ANT

IO_37 ANT_PCB

ANT_INT

65

43

21

9

7

5

1

3

12

10

8

6

11

2

4

9

7

5

1

3

12

10

8

6

11

2

4

B4

A1 B1

B2

A3

A4

A2

B3

VCCB

OE

VCCA

B8

B7

B6

B5

B4

B3

A8

A7

A6

A5

A4

A3

OE

VCCB GND

VCCA

A1

A2 B2

B1

SWD_IO

IO_13

IO_16

IO_14

GND_42

GND_41

GND_33

GND_32

GND_50

GND_48

GND_46

GND_43

RESET_N

SWD_CLK

IO_15

IO_45

NFC_2

XL_1

XL_2

GND_47

GND_44

NFC_1

SWD_IO

IO_13

IO_16

IO_14

GND_42

GND_41

GND_33

GND_32

GND_50

GND_48

GND_46

GND_43

RESET_N

SWD_CLK

IO_15

IO_45

NFC_2

XL_1

XL_2

GND_47

GND_44

NFC_1

SWD_IO

IO_13

IO_16

IO_14

GND_42

GND_41

GND_33

GND_32

GND_50

GND_48

GND_46

GND_43

RESET_N

SWD_CLK

IO_15

IO_45

NFC_2

XL_1

XL_2

GND_47

GND_44

NFC_1

M3

M2

J22

J19

J9

U9

M1

U4

R63

R62

R24

R35

R23

R27

R36

R18

R6

R26

R68

R4

R22

R43

ublox_anna_b1

ublox_anna_b1

ublox_anna_b1

ti_txs0104epwr

TXS0108

C24

C25

J11C51

J10

DRAWING TITLE :

1

4
3
2

1

R66 R65

X3 X5X4

R61R64

1

1031

30

38

28
27
24
23
26
25

29

34

35

19

20

36

7

9

2
3
4

8
49
51
52

11
6

37 1

5

1031

30

38

28
27
24
23
26
25

29

34

35

19

20

36

7

9

2
3
4

8
49
51
52

11
6

37 1

5

1031

30

38

28
27
24
23
26
25

29

34

35

19

20

36

7

9

2
3
4

8
49
51
52

11
6

37

5

10

2 13

12
4
5

3

11

14

8

1

3

7

2

7

12

2

6

3

1

8

5

9 10

4

11

1

7

5

3

8
109

2
4

11

6

12

43

5 6

1

16

2

4

8 13

6

5

9

3

1

17

15

12

19

10

18

4

20

14

11

2

1

C54

C8 C17 C13

C56

C19

C20

C48

C47

C57 C18C52C55

R67

E

D

C

B

A A

E

D

C

B

12345678

345678 2

U-BLOX AG

DATE :

SWITZERLAND

1

THALWIL

GROUP :

DESIGN BY :

ICM:

PCB_VER.:

VERSION :PROJECT :

BI
BI
BI

BI

BI

BI

BI

BI

BI

BI

BI

BI
BI

BI

BI

BI
BI

BI

BI

BI
BI

BI
BI

BI

BI

BI

BI

BI

BI
BI

BI

BI

BI

BI

BI

BI

BI

BI

BI
BI

BI

BI

BI

BI

BI

BI

BI

BI

BI
BI

BI

BI
BI

BI
BI

BI

BI

BI

BI
BI

BI

BI

BI

BI
BI

BI

BI

BI

BI

BI

BI

BI

BI
BI

BI
BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI
BI

BI

BI

45

12

13

40

131614

424133

32

504846

43

12

391545

22

171847

44

21

40

131614

424133

32

504846

43

12

39

15

22

171847

44

21

40

16

14

424133

32

504846

43

391545

22

171847

44

21

A3

THIS PAGE IS INTENTIONALLY LEFT BLANK DUE TO LICENSE AGREEMENTS

B

mwej
Fri Ma y 25 11: 22:4 9 2018

02

EVB- ANNA -B1

PAGE 2 O F 6u-bl ox AG $Cha nge: 6053 27

INTERFACE MCU

DRAWING TITLE :

E

D

C

B

A A

E

D

C

B

12345678

345678 2

U-BLOX AG

DATE :

SWITZERLAND

1

THALWIL

GROUP :

DESIGN BY :

ICM:

PCB_VER.:

VERSION :PROJECT :

A3

BOOT STR APPI NG
CONF IG

Thu Fe b 15 14: 33:4 1 2018

PAGE 3 O F 6

EVB- ANNA -B1

mwej

u-bl ox AG $Cha nge: 6053 27

B

02

10K

VBUS_MCU

CFG_SEL

DHSD_P

USB_FTDI _DP

USB_FTDI _DM

DHSD_N

UART_DTR _LVL

100N

HUB, FTDI AND FLASH

100N

1U

4U7

VDD_MCU

1%

12K

XTAL2

XTAL1

24.000MHZ

30PPM

8P2

+/-0.5P

8P2

+/-0.5P

VDD_MCU

100N

39R

5%

5%

DFSD_N

39R

1U

100K

100K

100K

NON_REM0

100K 100N

HUB_DETE CT

NON_REM1

100K

USB_HUB_ DM

USB_HUB_ DP

VDD_MCUVDD_MCU VDD_MCUVDD_MCU

DFSD_P

CBUS3

CBUS2

UART_DSR _LVL

UART_CTS _LVL

CBUS0
CBUS1

UART_RTS _LVL

UART_RXD _LVL
UART_TXD _LVL

RBIAS

PLLFILT

XTALIN

XTALOUT

USBDP_UP

USBDM_UP OCS2_N

PRTPWR2

CRFILT

VDD33_9

OCS1_N

PRTPWR1

RTS_N

DTR_N

CTS_N

DCD_N

DSR_N

RI_N

RESET_N

USBDP

CBUS0

TXD

RXD

CBUS3

3V3OUT

CBUS2

CBUS1

USBDM

VDD33_1 VDD33_18

SUSP_IND

VBUS_DET

RESET_N

SMBCLK

SMBDATANC

USBDP_DN2

USBDM_DN2

USBDP_DN1

USBDM_DN1

GND_21

GND_3

GND_13

VCCIO

VCC

U8

U2

R2

R3

microchip_usb2422

ftdi_ft231x

DRAWING TITLE :

19

11

20
21

12

10

823
7

11

24

922

18

10

15
14
7
16

6

5

4

2

19

1

17

9
8

R25

C14

TP7

TP4

TP6

C46

C23C45C22C21

R53

X2

C15

C16

R54

R55

R52

R56

C53

R51

TP5

E

D

C

B

A A

E

D

C

B

12345678

345678 2

U-BLOX AG

DATE :

SWITZERLAND

1

THALWIL

GROUP :

DESIGN BY :

ICM:

PCB_VER.:

VERSION :PROJECT :

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

14

15

6

3

181716113

245

20

3

13

21

12

A3

(TRACE_D0)

(TRACE_D1)
(TRACE_D2)
(TRACE_D3)

BLUE

MCU BOOT

I2C_SCL

CORT EX D EBUG

TRACE_D1

I2C_SDA

TRACE_CLK

TRACE_D2

NFC_1

UART_DSR

RED

SWIT CH 2

UART_DTR

I2C PULL UPS

LEDS

(SWO)

(TRACE_CLK)

RX/T X SE LECT ION

TRACE_D3

RESE T

BOOT JUM PER

ARDU INO INT ERFA CE

(SWO)

CORT EX DEB UG + ETM

DEBU G CON NECT ORS RASP BERRY PI INT ERFA CE

SWIT CH 1

NFC_2

SWIT CHES

TRACE_D0

Thu Fe b 15 14: 40:3 5 2018

PAGE 4 O F 6

EVB- ANNA -B1

mwej

u-bl ox AG $Cha nge: 6053 27

B

02

IO_28

IO_15

IO_14

IO_27
IO_29

3V3_PI

IO_22

UART_RXD

IO_17

IO_25

IO_37

UART_RTS

IO_21

IO_31

UART_CTS

IO_23

IO_30

IO_16
IO_18

IO_24
IO_26

IO_22

RESET_N

IO_45

IO_38

IO_36

IO_28

RASP_TXD
RASP_RXD

5V

UART_TXD

UART_RXD

0R

0R

VDD_IO

VDD_IO

IO_30

RESET_N

IO_14

IO_15

SWDCLK

3V3

IO_16

DSR_LED

UART_TXD _I

5V

VIN

5%

1K01K0

VCC=VDD_ IO;GND=G ND

DTR_LED

UART_CTS _I

UART_DTR _I

GREEN

RED

BLUE

UART_RTS _I

VCC=VDD_ IO;GND=G ND

RXD_LED

TXD_LEDRTS_LED

IO_27

VDD_IO

IO_13

IO_15

IO_45

SWDCLK

SWDIO

5%

IO_14

IO_13

VDD_IO

IO_38

UART_TXD

IO_36

IO_16
IO_37

IO_45

IO_24

IO_26

IO_28

IO_23

HEADERS & BUTTONS

UART_RXD _ICTS_LED

1K01K0 1K0

ORANGE

VCC=VDD_ IO;GND=G ND

VDD_IO

1K0 1K0

ORANGE

ORANGE

GREEN

1K0

UART_DSR _I

GREEN

GREEN

SWDIO

IO_16

RESET_N

DNI

3K9

3K9

DNI

3K9

DNI

3K9

DNI

IO_27

RASP_TXD

RASP_RXD

RASP_TXD

DNI

DNI

RASP_RXD

10K

VDD_IO

IMCU_BOO T

IO_38

100N

DNI

100N

VDD_MCU

IO_30

DNI

DNI

DNI

DNI

100N

IO_21

IO_25

RESET_N

IO_16

RESET_N

5%

2K7

VDD_IO

DNI

IO_31
IO_29
UART_RTS
UART_CTS

DNI

IO_14
IO_15

IO_13

100N

1

1

1

1

1

1

1

1

1

5

3

1

7

4

20

13

2

6

8

10

12

14

16

181917

15

11

9

17

19

21

30

32

34

14

16

18

24

26

2

3

29

1

22

27

25

23

12

20

40

38

15

13

11

9

7

5

31

33

35

37

39

36

28

8

10

6

4

R

G

B

A

109

1

7

3

5

8

2

6

4

J21

U3

DS9

J12

U7U5

R59

R57

R8R40 R39R7R11R10

R60

R58

J14

R41

74LVC3G07

wurth_150141m173100

74LVC3G07 74LVC3G07

SW3SW1

SW2

TP26

SW0

TP24

TP27

J18

J4

J3

J2

J1

DRAWING TITLE :

1

2

5

4

3

8

7

6

6

5

4

3

2

1

1

2

5
4
3

8
7
6

1

2

5
4
3

6

7

8

9

10

AC

C

A

AC

A

A

AC

C

C

DS8

DS5

DS2

DS1

DS7

DS6

R69

R50

R70

R44

33

31

28

26

19

10

6

4

12

35

32
34
36

8

25

23

21

20

8

2

1

3

2

4

2

1

6

13

9

3

2

7

2

4

6
7
8

1 7

3 5

6

5
6

1

2

3

6

3

2

7

5

2

4

21
3
5 6
7 8

2

9

16
18

10

5

5

10

2

4

9

3

4

1

3

3

5

3
2

7

5

6

1

12

14
15
17

8

1

7
6

1

4

11

26

5

43

8

11

29

27

17

15

9

7

5

3

1

3

2

4

2

1

3

1

4

4

3

1

7

10

4

19

39

37

2

40

38

30

24

22

20

18

16

14

1

11

13

C49

C9

C11

C10

R21R20R19

E

D

C

B

A A

E

D

C

B

12345678

345678 2

U-BLOX AG

DATE :

SWITZERLAND

1

THALWIL

GROUP :

DESIGN BY :

ICM:

PCB_VER.:

VERSION :PROJECT :

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI

BI BI

BI

BI

BI

BI

A3

3.3V REG ULAT ED

BATT ERY PROT ECTI ON:

POWE R SOU RCE SELECTO R

CURR ENT FLOW

NFC CAN CAUS E REV ERSE

6213 2 3.3 V VERSION

EXTE RNAL SUP PLY

BY A N EX TERN AL S OURC E, U SB E TC.

IF USED , THE 5V NET MUS T BE SUPPLIE D

USB

5-12 V

COIN CELL BATT ERY 3V

LOW CURR ENT LEA KAGE CAPS FOR SUPPLY HIGH CURRENT PEAKS

'ZER O VOL T DIODE' - PROTECT S FROM BACK CURREN T ON VBUS LINES

DMG2 305U X

Fri Fe b 16 12: 12:2 5 2018

PAGE 5 O F 6

EVB- ANNA -B1

mwej

u-bl ox AG $Cha nge: 6053 27

B

02

BASE_1

47K

10K

P_CH ANNEL _MOS FET

VBUS_MCU

BASE_1

100N

USB_HUB_ DP

2U22U2

DCDC_IN

100K

VBUS_MCU

10M

100N

VBAT

22U4U7

100N

3N3

10U

VBAT

100U

DNI

100U

3V

VBATVBAT

SGND=GND A

SUSB_MIC RO_B_4T HGND

3V3_PI

VDD_ANNA VD D_MCU

3V3

USB_HUB_ DM

5V

POWER SUPPLY

5V

USB_DP_M CUCON

USB_DM_M CUCON

VBUS_MCU

VIN

USB MICRO B

GNDA

DM

VUSB

GND

DP

N.C.

9

7

5

1

3

12

10

8

6

11

2

4

G S

D

Q1

D1

D6 J7

A

C

J8

VCCGND

I/O1 I/O1
I/O2 I/O2

B2

E2 C2

E1C1

B1

J17

R9

R1

C6

L2L1

TP35

TP8

TP9

TP38

DRAWING TITLE :

CATAN

F1

R71

3

Q2

2

6

3

1

2

1

2

6
4

1

5

5

10

8

6

1

10

5

14

C

12

9

13

68

4

16

11

9

2

3

7

11

5

4

3

2

1

3

7

4

15

12

2

5

4

1

A

CA1

3

2

USBLC6 2SC6

C59

C2C1C3

C5

C58

D3

J5

D4

C7

R5

C50

BT1

D2

E

D

C

B

A A

E

D

C

B

12345678

345678 2

U-BLOX AG

DATE :

SWITZERLAND

1

THALWIL

GROUP :

DESIGN BY :

ICM:

PCB_VER.:

VERSION :PROJECT :

BI

BI

CON_PWR_03_SWITCH

PGND_2

PGND_1

PG

VOS

SW_3

SW_2

SW_1

PVIN_2

PVIN_1

21

2

3

1

U1

AGND

FB

FSW

DEF

SS/TR

EN

AVIN

FUSE

TPS6213X

A3

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Appendix Page 27 of 29

B Glossary

Name Definition

API Application Programming Interface

CTS Clear To Send

DSR Data Set Ready

DTR Data Terminal Ready

EVB Evaluation Board

EVK Evaluation Kit

GND Ground

IO General-Purpose Input/Output

LED Light-Emitting Diode

MCU Micro Controller Unit

MSD Mass Storage Device

NFC Near Field Communication

U.FL Coaxial RF connector

USB Universal Serial Bus

RTS Request To Send

RXD Receive Data

SDK Software Development Kit

SPA Serial Port Application

TXD Transmit Data

UART Universal Asynchronous Receiver/Transmitter

Table 14: Explanation of abbreviations used

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Related documents Page 28 of 29

Related documents

[1] ANNA-B112 Data Sheet, document number UBX-18011707
[2] ANNA-B112 Series System Integration Manual, document number UBX-18009821
[3] u-blox Short Range AT Commands Manual, document number UBX-14044127
[4] SEGGER J-Link software - https://www.segger.com/jlink-software.html
[5] ANNA-B112 Getting Started, document number UBX-18020387

☞ For regular updates to u-blox documentation and to receive product change notifications, register

on our homepage (www.u-blox.com).

Revision history

Revision Date Name Comments

R01 5-Jun-2018 hekf, mwej, kgom Initial release.

EVK-ANNA-B112 - User Guide

UBX-18018539 - R01 Contact Page 29 of 29

Contact

For complete contact information, visit us at www.u-blox.com.

u-blox Offices

North, Central and South America

u-blox America, Inc.

Phone: [phone]
E-mail: [e-mail]

Regional Office West Coast:

Phone: [phone]
E-mail: [e-mail]

Technical Support:

Phone: [phone]
E-mail: [e-mail]

Headquarters
Europe, Middle East, Africa

u-blox AG

Phone: [phone]
E-mail: [e-mail]
Support: [e-mail]

Asia, Australia, Pacific

u-blox Singapore Pte. Ltd.

Phone: [phone]
E-mail: [e-mail]
Support: [e-mail]

Regional Office Australia:

Phone: [phone]
E-mail: [e-mail]
Support: [e-mail]

Regional Office China (Beijing):

Phone: [phone]
E-mail: [e-mail]
Support: [e-mail]

Regional Office China (Chongqing):

Phone: [phone]
E-mail: [e-mail]
Support: [e-mail]

Regional Office China (Shanghai):

Phone: [phone]
E-mail: [e-mail]
Support: [e-mail]

Regional Office China (Shenzhen):

Phone: [phone]
E-mail: [e-mail]
Support: [e-mail]

Regional Office India:

Phone: [phone]
E-mail: [e-mail]
Support: [e-mail]

Regional Office Japan (Osaka):

Phone: [phone]
E-mail: [e-mail]
Support: [e-mail]

Regional Office Japan (Tokyo):

Phone: [phone]
E-mail: [e-mail]
Support: [e-mail]

Regional Office Korea:

Phone: [phone]
E-mail: [e-mail]
Support: [e-mail]

Regional Office Taiwan:

Phone: [phone]
E-mail: [e-mail]
Support: [e-mail]