AFE Pinout for MAVRK

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= Purpose of this Wiki Page =

This page contains the pinout and signal descriptions for the Modular and Versatile Reference Kit (MAVRK) AFE modules. These modules are typically used for Analog to Digital (ADC) and Digital to Analog (DAC) data conversion.

= Introduction =

Analog Front End (AFE) modules interface with the MAVRK Motherboard through two connectors. The top connector, AFEx_CON_1, interfaces the AFE to the MCU module through the left (L) or right (R) MCU interface. On the MB-PRO-MVK, the left interface is shared between AFE modules 2 and 4, and the right interface between modules 1 and 3. The bottom connector, AFEx_CON_2 is mainly responsible for interfacing the corresponding signal conditioning interface (SCI) module to the AFE module. See the Hardware Design Guide for MAVRK AFE Modules for details on designing AFE modules.

= AFE Module Pinout =

Table 1 lists the pinout for the MAVRK AFE modules. Figure 1 shows AFEx_CON_1 and AFEx_CON_2 on the AFE Template schematic.

= AFE Module Signal Descriptions =

The AFE connectors have dedicated I2C, SPI, I2S, UART, and CAN connections to the MCU and adjacent AFE module. Separate I2C and SPI lines allow the AFE to communicate directly with its corresponding SCI module. Analog channels and GPIOs are also available between the two adjacent AFEs and the MCU, as well as between each AFE and its SCI module. Table 2 lists the AFE signals with their definitions. For more details on how to use the AFE signals, see the Hardware Design Guide for MAVRK AFE Modules.

= MAVRK Motherboard AFE Pinout =

The MB-PRO-MVK AFE slots follows the same pinout shown on Table 1 for the AFE modules. The only exceptions are AFE_AVDD_5_5V and AFE_DVDD_3_3V. On the MB-PRO-MVK, these pins are named AFEx_MON_1 and AFEx_MON_2, respectively. They will be used to monitor voltages and currents on future versions of the Motherboard.

= AFE-SCI Bus =

For details on the AFE-SCI bus, see the MAVRK SCI Module Pinout.