ST GS-BT2416C2DBAT1, GS-BT2416C2DB User Manual

October 2007 Rev 1 1/19

UM0472

User manual

Bluetooth class 2 evaluation boards

GS-BT2416C2DB and GS-BT2416C2DBAT1

Introduction

This user manual details the GS-BT2416C2DB.xxx which is a Bluetooth Class 2 evaluation
board for GS-BT2416C2.H and GS-BT2416C2.AT1 Bluetooth modules including an RF
antenna. The suffix xxx identifies the firmware release. There is no suffix for HCI
commands and AT1 is the suffix for AT commands.

The GS-BT2416C2DB is a board with downloaded FW which enables the user to interface
the Bluetooth module with HCI commands.

The GS-BT2416C2DBAT1 is a board with downloaded FW which enables the user to create
a Bluetooth link with simple AT commands. AT commands are sent by means of the serial
line which is accessible by the DB9 connector.

The GS-BT2416C2DB.xxx board can be supplied by an external 5 V DC source or via the
USB port.

Features

● Bluetooth V1.2 board

● Serial interface on DB9 connector

● USB connection

● PCB antenna on board

● Single 5 V supply voltage

● CE compliant

● FCC compliant

● FCC ID: S9N16C2

Figure 1. GS-BT2416C2DB.xxx board

www.st.com

Obsolete Product(s) - Obsolete Product(s)

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Contents UM0472

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Contents

1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 I/O connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 Board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Board schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Downloading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6 Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6.1 CE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6.2 FCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6.2.1 FCC Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6.2.2 Label instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7 Special requirements for modular application . . . . . . . . . . . . . . . . . . . 11

8 AT commands appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

8.1 Setup & connect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

8.2 Steps to connect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

8.3 Macro instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8.4 Module BT address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

8.5 Point-to-point connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

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UM0472 Recommended operating conditions

3/19

1 Recommended operating conditions

2 I/O connections

Table 1. Recommended operating conditions

Symbol Parameter Conditions Min Typ Max Unit

VDD Board supply voltage -20°C < T < 70°C 4 5 6 V

Tstg Operating ambient temperature -20 +70 °C

Table 2. Board connections

Description

J1

1 Boot signal - If connected to GND, the module can download – see also JP1

2 Reset signal - A low level on this pin forces the module to reset state - see also S3

J2

USB Port
When the USB port is connected, the 5 V USB is used (by the 3.3 V regulator) to supply the BT module

and the board itself
When the USB port is used, do not supply an ext. 5 V to J4 power plug
The USB port is not used for AT version

J3

Serial line port (DB9 male connector)
A level translator to adapt the BT module digital levels to the RS232 standard levels is present on the

board.

J4

Vcc Power supply plug (5 V)
When 5 V input is used on J4 plug, do not connect USB port

J5

1GPIO 15

2GPIO 14

3GPIO 13

4GPIO 12

5GPIO 11

6GPIO 10

7GPIO 9

8GPIO 8

9GPIO 7

10 GPIO 4

11 GPIO 3

12 GPIO 2

13 GPIO 0

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I/O connections UM0472

4/19

JP1

Boot
If connected to GND the module can download

JP2 DB9 connector connection – see Figure 3: Board schematic on page 6

JP3 DB9 connector connection – see Figure 3: Board schematic on page 6

JP4 DB9 connector connection – see Figure 3: Board schematic on page 6

JP5 DB9 connector connection – see Figure 3: Board schematic on page 6

JP6 DB9 connector connection – see Figure 3: Board schematic on page 6

S1

N.O. push button connected to BT module GPIO6; when activated a Low level is applied to GPIO6
otherwise GPIO6 is at High level.

Not used for AT commands version

S2

Switch connected to GPIO3 (10 KΩ pull-up to 3.3 V)
In AT version this switch is used to select Command / Data mode

S3 Reset – Push button acting on the module reset pin

L1

LED connected to BT module GPIO1.
On AT version this LED shows when a Bluetooth connection is ON (LED ON)

L2 LED showing the presence of the 3.3 V internal voltage – Bluetooth module supply voltage

Table 2. Board connections (continued)

Description

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UM0472 Board layout

5/19

3 Board layout

Figure 2. Board component layout

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Board schematic UM0472

6/19

4 Board schematic

Figure 3. Board schematic

JP4

PC_RTS

JP5

JP3

PC_RX

PC_CTS

J3

594837261

PC DTR

JP6

GND

PC DSR

JP2

C1

22u

6.3V

GPIO5

J2

USB CON.

123

4

GPIO1

L1

GREEN

R2

470 Ohm

R1

10K

GPIO6

S1

C11

NM

D1 BYV10-60

Vext+5V

GND

J4

PLUG

1

3

2

C6

100n

+3.3V

U4 ST3232

C1-

3

C2+

4

C2-

5

V-

6

T2out

7

R2in

8

R2out9T2in10GND15T1out

14

C1+

1

T1in

11

V+

2

R1in13R1out12Vcc

16

PC_TX

C8 100n

C10 100n

C7

100n

U2 74V1G66CTR

I/O1O/I2GND

3

C

4

Vcc

5

C9

100n

RESET

BOOT

J1

1

2

+3.3V

BT1

BLUETOOTH MODULE GS-BT2416C 2

GPIO025GPIO126GPIO227GPIO328GPIO429GPIO530GPIO631GPIO732GPIO833GPIO934GPIO1135GPIO1036GPIO1237GPIO1338GPIO1439GPIO15

40

(JTAG1) TDI

1

(JTAG4) TDO

4

(JTAG2) TMS

2

(JTAG0) NTRST

3

(JTAG3) TCK

5

(I2C_DAT) I2C07(I2C_CLK) I2C 1

8

INT1

6

PCM_SYNC

10

PCM_CLK

9

PCM_A12PCM_B

11

USB_DN

21

USB_DP

22

(UART_RX) RXD

13

(UA R T_TX) TXD

14

(UART_CTS) CTS15(UART_RTS) RTS

16

SPI_FRM

17

SPI_CLK

18

SPI_TXD

19

SPI_RXD

20

VIN (VDDIO)41GND

42

RESET

23

BOOT

24

RF-GND

43

ANT

44

RF-GND

45

L2

GREEN

R4

470 Ohm

C5

100n

J5

12345678910111213

ANT1

ANTENNA BLUETOOTH

JP1

GPIO5

NM = NOT MOUNTED

+3.3V

S3

R3

10K

+3.3V

Data

Command

S2

2

1

3

U1 LD2985BM33R

Vin

1

GND

2

ByPas s4Vout

5

INHIBIT

3

USB +5V

FOR INTERNAL FLASH

PROGRAMMING

C3

10u

6.3V

USB (D-)

USB (GND)

USB (D+)

USB (Vcc)

C12 39pF

C2

10n

U3 USBUF01W6

D11GND2D2

3

D3

4

3.3V

5

D4

6

C4

100n

+3.3V