Texas Instruments CC256xEM User manual

CC256xEM Bluetooth® Adapter Kit

User's Guide

Literature Number: SWRU417

June 2015

Contents

Preface ........................................................................................................................................ 4

1 Overview............................................................................................................................. 6

2 Hardware Description........................................................................................................... 7

2.1 CC256XEM Connectors .................................................................................................... 8

2.2 STM32 Connectors ........................................................................................................ 10

2.2.1 JD1 Headers....................................................................................................... 10

2.2.2 JD2 Headers....................................................................................................... 12

2.2.3 JE3 Headers ....................................................................................................... 14

2.3 UART Selection............................................................................................................. 16

2.4 PCM/I2S Selection......................................................................................................... 17

2.5 32.768-KHz Clock.......................................................................................................... 17

3 Schematics........................................................................................................................ 18

4 Bill of Materials .................................................................................................................. 21

5 Layout............................................................................................................................... 21

2Contents SWRU417–June 2015

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List of Figures

1. Hardware Setup Examples ................................................................................................ 5

1-1. CC256XEM-STADAPT Overview ......................................................................................... 6

2-1. Block Diagram................................................................................................................ 7

2-2. Block Diagram of UART Connections ................................................................................... 16

3-1. Schematic 1................................................................................................................. 19

3-2. Schematic 2................................................................................................................. 20

5-1. PCB 3D Print (Top) ........................................................................................................ 22

5-2. PCB 3D Print (Bottom) .................................................................................................... 22

5-3. Top Overlay................................................................................................................. 22

5-4. Top Solder Mask ........................................................................................................... 23

5-5. Top Layer.................................................................................................................... 23

5-6. Mid Layer 1.................................................................................................................. 23

5-7. Mid Layer 2.................................................................................................................. 24

5-8. Bottom Layer................................................................................................................ 24

5-9. Bottom Solder Mask ....................................................................................................... 24

5-10. Bottom Overlay ............................................................................................................. 25

5-11. Drill Drawing ................................................................................................................ 25

5-12. Board Dimensions.......................................................................................................... 25

List of Tables

2-1. Table of Pins JR1............................................................................................................ 8

2-2. Table of Pins JR2............................................................................................................ 9

2-3. Table of Pins JD1 .......................................................................................................... 10

2-4. Table of Pins JD2 .......................................................................................................... 12

2-5. Table of Pins JE3 .......................................................................................................... 14

2-6. UART Connections......................................................................................................... 16

4-1. BOM.......................................................................................................................... 21

SWRU417–June 2015 List of Figures

Preface

SWRU417–June 2015

CC256xEM Bluetooth Adapter Kit User Guide

The CC256xEM Bluetooth®Adapter Kit (CC256XEM-STADAPT) is a connector board aimed to help

evaluate TI’s CC256x Bluetooth and Dual-Mode solution with STM32 MCUs. The CC256XEM-STADAPT

board serves as a translation board between a CC256xEM board (CC256XQFNEM, CC2564MODAEM,

and CC2564MODNEM) and a STM32 MCU Evaluation board (STM3240G-EVAL and

STM32F4DISCOVERY).

This document provides an overview of the CC256XEM-STADAPT board, and describes the required

hardware and software tools. Furthermore, this user's guide details the functions of each component on

the board and how they are configured for different settings. There is also a Bluetooth Adapter Kit Quick

Start Guide (SWRU416) that summarizes the configurations for different functions. There are also design

files available with schematics, layouts, and bill of materials (SWRC308).

CC256XEM-STADAPT Board

Bluetooth is a registered trademark of Bluetooth SIG.

4CC256xEM Bluetooth Adapter Kit User Guide SWRU417–June 2015

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Kit Content

• 1 CC256XEM-STADAPT Board

Requirements

Hardware

• 1 CC256xEM Board – Sold separately

– CC256XQFNEM Board – http://www.ti.com/tool/cc256xqfnem

– CC2564MODAEM Board – http://www.ti.com/tool/cc2564modaem

– CC2564MODNEM Board – http://www.ti.com/tool/cc2564modnem

• 1 STM32 MCU Evaluation Board – Sold separately

– STM3240G-EVAL Board

– STM32F4DISCOVERY Board

Software

• TI dual-mode Bluetooth stack on STM32F4 MCUs – Free download

– CC256XSTBTBLESW – http://www.ti.com/tool/cc256xstbtblesw

Figure 1. Hardware Setup Examples

SWRU417–June 2015 CC256xEM Bluetooth Adapter Kit User Guide

Chapter 1

SWRU417–June 2015

Overview

The CC256XEM-STADAPT board allows the connection between a CC256xEM board (CC256XQFNEM,

CC2564MODAEM, and CC2564MODNEM) and a STM32 MCU Evaluation board (STM3240G-EVAL and

STM32F4DISCOVERY).

On one side, the JR1 and JR2 connectors are provided to interface with a CC256xEM board; on the other

side, there are two options for the STM32 MCU Evaluation boards. For the first option, JE3 and JD2

connectors enable the connection to CN3 and CN4 headers in the STM3240G-EVAL board, respectively.

In the second option, JD1 and JD2 connectors allow the connection to headers P1 and P2 in the

STM32F4DISCOVERY board, respectively. Furthermore, an on-board 32.768-KHz crystal oscillator can

provide the slow clock to the CC256xEM boards.

The CC256XEM-STADAPT board provides flexibility to route the UART and PCM/I2S signals to different

pins on the STM32 MCU Evaluation boards through a set of resistors and jumpers. The jumpers on

headers J1 through J6 control which evaluation board, STM3240G-EVAL or STM32F4DISCOVERY,

receives the UART signal. Zero-ohm resistors can be soldered on to the PCM/I2S section to provide the

signal to the STM32 MCU Evaluation boards if their application requires I2S communication. Reference

Section 2.3 and Section 2.4 for the UART and PCM/I2S communication configurations.

Figure 1-1. CC256XEM-STADAPT Overview

6Overview SWRU417–June 2015

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Chapter 2

SWRU417–June 2015

Hardware Description

The CC256XEM-STADAPT routes the pins from a CC256XEM board to the appropriate pins of either a

STM3240G-EVAL or STM32F4DISCOVERY board. It also has a 32.768 KHz crystal oscillator to provide

the slow clock to the CC256XEM.

Figure 2-1. Block Diagram

SWRU417–June 2015 Hardware Description

CC256XEM Connectors

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2.1 CC256XEM Connectors

The twin 2×10 headers, JR1 and JR2, interface with the connectors RF1 and RF2, respectively, of a

CC256XEM board (CC256XQFNEM, CC2564MODAEM, or CC2564MODNEM).

Table 2-1 and Table 2-2 are divided into the pins and functions on the CC256XEM-STADAPT board seen

in the data sheet or schematics, and the corresponding pins and functions on the CC256X EM boards.

Table 2-1. Table of Pins JR1

CC256XEM-STADAPT CC256X EM

Pin Function Pin Function

JR1.20 GND RF1.1 GND

JR1.18 CC_UART_CTS RF1.3 HCI_CTS_3V3

JR1.16 CC_SLOW_CLOCK RF1.5 SLOW_CLK_EXT_3V3

JR1.14 CC_UART_RX RF1.7 HCI_RX_3V3

JR1.12 CC_UART_TX RF1.9 HCI_TX_3V3

JR1.10 X RF1.11 X

JR1.8 X RF1.13 X

JR1.6 X RF1.15 X

JR1.4 X RF1.17 X

JR1.2 GND RF1.19 GND

JR1.19 X RF1.2 X

JR1.17 X RF1.4 X

JR1.15 X RF1.6 X

JR1.13 X RF1.8 X

JR1.11 X RF1.10 X

JR1.9 X RF1.12 X

JR1.7 X RF1.14 X

JR1.5 X RF1.16 X

JR1.3 X RF1.18 X

JR1.1 X RF1.20 X

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CC256XEM Connectors

Table 2-2. Table of Pins JR2

CC256XEM-STADAPT CC256X EM

Pin Function Pin Function

JR2.20 X RF2.1 X

JR2.18 X RF2.3 X

JR2.16 X RF2.5 X

JR2.14 CC_VCC RF2.7 VBAT_MCU

JR2.12 CC_VCC RF2.9 VBAT_MCU

JR2.10 CC_PM_FSYNC RF2.11 AUD_FSYNC_3V3

JR2.8 X RF2.13 X

JR2.6 X RF2.15 X

JR2.4 CC_PCM_CLK RF2.17 AUD_CLK_3V3

JR2.2 CC_nSHUTD RF2.19 nSHUTDN_3V3

JR2.19 GND RF2.2 GND

JR2.17 X RF2.4 X

JR2.15 X RF2.6 X

JR2.13 CC_PCM_DOUT RF2.8 AUD_OUT_3V3

JR2.11 CC_PCM_DIN RF2.10 AUD_IN_3V3

JR2.9 X RF2.12 X

JR2.7 X RF2.14 X

JR2.5 X RF2.16 X

JR2.3 CC_UART_RTS RF2.18 HCI_RTS_3V3

JR2.1 X RF2.20 X

SWRU417–June 2015 Hardware Description

STM32 Connectors

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2.2 STM32 Connectors

The CC256XEM-STADAPT board interfaces with either a STM3240G-EVAL or STM32F4DISCOVERY

through use of three 2×50 headers: JD1, JD2, and JE3.

NOTE: There may be alternate functions for each MCU pin, but only the ones used in the relevant

setting are listed.

2.2.1 JD1 Headers

The JD1 headers are one of three 2×50 headers that protrude out of the bottom of the board. The

CC256XEM-STADAPT can connect to a STM32F4DISCOVERY Evaluation board by connecting JD1 and

JD2 into the P1 and P2 headers, respectively.

Table 2-3. Table of Pins JD1

CC256XEM-STADAPT STM32F4DISCOVERY

Pin Function Pin MCU Pin Function

JD1.1 GND P1.2 GND GND

JD1.3 X P1.4 VDD X

JD1.5 X P1.6 NRST X

JD1.7 X P1.8 PC0 X

JD1.9 X P1.10 PC2 X

JD1.11 X P1.12 PA0 X

JD1.13 X P1.14 PA2 X

JD1.15 DISCOVERY_I2S3_WS P1.16 PA4 I2S3_WS

JD1.17 X P1.18 PA6 X

JD1.19 X P1.20 PC4 X

JD1.21 X P1.22 PB0 X

JD1.23 X P1.24 PB2 X

JD1.25 X P1.26 PE8 X

JD1.27 X P1.28 PE10 X

JD1.29 X P1.30 PE12 X

JD1.31 DISCOVERY_CC_nSHUTD P1.32 PE14 GPIO

JD1.33 X P1.34 PB10 X

JD1.35 X P1.36 PB12 X

JD1.37 X P1.38 PB14 X

JD1.39 DISCOVERY_USART3_TX P1.40 PD8 USART3_TX

JD1.41 X P1.42 PD10 X

JD1.43 DISCOVERY_USART3_RTS P1.44 PD12 USART3_RTS

JD1.45 X P1.46 PD14 X

JD1.47 X P1.48 NC X

JD1.49 X P1.50 GND X

JD1.2 GND P1.1 GND GND

JD1.4 X P1.3 VDD X

JD1.6 GND P1.5 GND GND

JD1.8 X P1.7 PC1 X

JD1.10 X P1.9 PC3 X

JD1.12 X P1.11 PA1 X

JD1.14 X P1.13 PA3 X

JD1.16 X P1.15 PA5 X

JD1.18 X P1.17 PA7 X

10 Hardware Description SWRU417–June 2015

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