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
Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated

www.ti.com
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
3
SWRU417–June 2015 List of Figures
Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated

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
Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated

www.ti.com Kit Content
Kit Content
• 1 CC256XEM-STADAPT Board
Requirements
Hardware
• 1 CC256xEM Board – Sold separately
– CC256XQFNEM Board – http://www.ti.com/tool/cc256xqfnem
OR
– CC2564MODAEM Board – http://www.ti.com/tool/cc2564modaem
OR
– CC2564MODNEM Board – http://www.ti.com/tool/cc2564modnem
• 1 STM32 MCU Evaluation Board – Sold separately
– STM3240G-EVAL Board
OR
– 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
5
SWRU417–June 2015 CC256xEM Bluetooth Adapter Kit User Guide
Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated

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
Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated

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
7
SWRU417–June 2015 Hardware Description
Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated

CC256XEM Connectors www.ti.com
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
8Hardware Description SWRU417–June 2015
Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated

www.ti.com 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
9
SWRU417–June 2015 Hardware Description
Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated

STM32 Connectors www.ti.com
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
Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated