Audio Interfaces; Table 8: Wlan/Bluetooth Module Gpio Definitions - pandaboard OMAP 4 Series System Reference Manual

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Table of Contents

GPIO

GPIO_43

GPIO_46

GPIO_48

GPIO_49

GPIO_52

GPIO_53

2.14

See Figure 14 for a block diagram of the audio connectivity on the PandaBoard. In this block diagram,

the signals with a red background in the box specifying their direction are analog I/Os while all others are

1.8V digital I/Os.

The OMAP4430 PandaBoard provides a stacked audio connector, which provides two 3.5mm audio jack

connections. The upper jack on this stacked connector (J16A in Figure 14 below), is connected to the

Headset Microphone Plus and Minus inputs of the TWL6040 Audio Companion IC. The lower jack on

this stacked connector (J16B in Figure 14 below) is connected to the Headset Left and Right outputs of

the TWL6040. The digital path for this audio back to the OMAP4430 processor is through the PDM

interface For expansion purposes, the left and right Hands-Free speaker outputs of the TWL6040 are

connected to the Expansion Connector J6 (see Paragraph 2.16 on page 42 for further details).

The PandaBoard also provisions an FM analog input and output path from the TWL6040 Audio

Companion IC to the LS240-WI-01-A20 module. In addition, there is a digital PCM path for Bluetooth

audio from the module to OMAP4430 via McBSP1, and the digital FM I2S path through the OMAP4430

McBSP2 interface.

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Signal Name

WLAN_EN

BT_EN

FM_EN

BT_WAKEUP

FM_nIRQ

WLAN_nIRQ

Table 8: WLAN/Bluetooth Module GPIO Definitions