AN4127

I/O connections

Doc ID 023304 Rev 1

5/27

4

I/O connections

4.1

PAD description

Other than the USB plug, some pads are also available. In fact PAD1 to PAD13 make the

SPBT2632C2A.AT2 pins available to the user.

Table 2 gives a description of these pads.

Figure 4.

Front side connection

Figure 5.

Bottom side connection

1

3

4

13

PAD 1 to 3

PAD 4 to 13

LED1

LED3

LED2

AM12669V1

J1 JTAG connector

AM12670V1

Table 2.

Pad connections

Description

PAD

1

BOOT0 - Boot pin used for firmware downloading - used for testing purposes

2

3.3 V (module – LED1 is connected to this PAD)

3

RESETN - reset - connected in parallel to onboard reset switch

4GND

5

+5 V (USB)

6

LPO (external 32.768 kHz frequency input to allow deep sleep and sniff mode

Bluetooth module functional states)

7

GPIO07 – general purpose I/O

8

9

10

11

12

13

GPIO05 – general purpose I/O