User's Manual

LE940B6 Hardware User Guide
1VV0301331 Rev. 1.8 - 2017-03-15
Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved
Telit Confidential Information, provided under NDA Page
79 of 104
8.5.2. Digital Audio
The LE940B6 module can be connected to an external codec through the digital interface.
The product provides a single Digital Audio Interface (DVI) on the following pins:
Table 32: Digital Audio Interface (DVI) Signals
PAD Signal I/O Function Type Comments
D11 DVI_WA0 O Digital Audio Interface (WA0) B-PD 1.8V PCM_SYNC
C8 DVI_RX I Digital Audio Interface (RX) B-PD 1.8V PCM_DIN
D9 DVI_TX O Digital Audio Interface (TX) B-PD 1.8V PCM_DOUT
C10 DVI_CLK O Digital Audio Interface (CLK) B-PD 1.8V PCM_CLK
8.6. General Purpose I/O
The general-purpose I/O pads can be configured to act in three different ways:
• Input
• Output
• Alternative function (internally controlled)
Input pads can only be read, reporting digital values (high / low) present at the reading time.
Output pads can only be written or queried and set values on the pad output. Alternative function
can be internally controlled by LE940B6 firmware and act according to the implementation.
The type of GPIO can be set to Open-drain signaling; default type is CMOS mode.
Table 33: GPIOs
PAD Signal I/O Function Type Drive Strength
F9 GPIO_01 I/O Configurable GPIO CMOS 1.8V 1 mA
E10 GPIO_02 I/O Configurable GPIO CMOS 1.8V 1 mA
F11 GPIO_03 I/O Configurable GPIO CMOS 1.8V 3 mA
E12 GPIO_04 I/O Configurable GPIO CMOS 1.8V 3 mA
F13 GPIO_05 I/O Configurable GPIO CMOS 1.8V 1 mA
E14 GPIO_06 I/O Configurable GPIO CMOS 1.8V 3 mA