User's Manual
SPBT2425C2DB.xxx 
       rev. 1.0    18-Jun-07      2/9 
 2 - I/O CONNECTIONS 
DESCRIPTION 
J1    Vcc Power supply plug ( 5V ) 
J2 
 USB Port 
When the USB port is connected , the 5V USB is used to supply the BT module ( by 
means a voltage regulator) and the board itself 
When USB port is used 5V on J1 power plug can be avoided 
1 USB_DN 
2 USB_DP 
3 SPI_FRM 
4 SPI_CLK 
5 SPI_TXD 
6 SPI_RXD 
J3 
7 GND 
1 Boot 
2 GPIO 0 
3 GPIO 1 
4 GPIO 2 
5 GPIO 3 
6 GPIO 4 
7 GPIO 5 
8 GPIO 6 
9 GPIO 7 
10 GPIO 8 
11 GPIO 9 
12 LP_CK 
13 GPIO 11 
14 GPIO 12 
15 GPIO 13 
16 GPIO 14 
17 GPIO 15 
18 1.8V 
19 2.8V 
20 INHIBIT 
J4 
21 VDD 
1 RX_EN 
2 PA_EN 
3 PA_V1 
4 PA_V0 
5 ANT_SW 
6 PCM_A 
7 PCM_B 
8 PCM_SYNC 
9 PCM_CLK 
10 NTRST 
11 TDI 
12 TMS 
13 TCK 
14 TDO 
15 13 MHz out 
16 RESET 
17 INT2 
18 RXD 
19 TXD 
20 I2C0 
J5 
21 I2C1 









