Hardware Overview
15
SBAU341B – January 2020 – Revised June 2020
Copyright © 2020, Texas Instruments Incorporated
PCM6xx0Q1EVM-PDK Evaluation Module
2.2.4
GPIO1 Hardware Configurations
GPIO1 has many configuration options, however the EVM supports three modes. These modes are
configured, as shown in
, by the installation or removal of resistors on the bottom of the EVM.
Figure 16. GPIO1 Hardware Configuration
2.2.4.1
GPIO1 as INTz (Default Configuration)
The default configuration for GPIO1 on the PCM6xx0Q1EVM is as an interrupt indicator. When configured
in this state, and when the onboard diagnostics detect a fault, an interrupt request is sent on GPIO1,
which causes LED D3 on the EVM to illuminate, indicating to the user that a fault is detected. The user
can then use the EVM software to provide diagnostic feedback.
2.2.4.2
GPIO1 as an MCLK Input
When the PCM6xx0Q1 device must be configured as the audio serial bus master, an external MCLK is
required. To support an external MCLK, remove R21 and install a R22. This process connects the GPIO
to the MCLK pin of the external ASI header. Master mode is only supported with an external ASI.
2.2.4.3
Other Supported GPIO1 Functionality
Other GPIO functionality can also be supported by using the GPIO1 header (J28). This approach requires
the removal of both R21 and R22. In this configuration the GPIO1 can be connected using J28.