Hardware
4
Hardware
4.1
Power Requirements
The PCM186xEVM requires a 5-V power supply. This can be sourced from the I2X board via USB or
applied directly to the EVM on the +5-V header just above J1. Once 5 V is applied, the PCM186x board
regulates the 5 V down to a clean analog 3.3 V. A green LED just to the right of the 5-V header illuminates
if the voltages are present.
4.2
Connectors and Headers
Figure 5. Diagram of Connector/Header Locations
•
J1
– J1 is the I2X board connector. Provides I2C, I2S and +5 V connections to the PCM186x EVM.
•
+5V
– Input for power if no USB-I2X board is used. Output for +5 V, if USB-I2X board is used.
•
Vin1
– Pins 3 (red-top input) and 4 (white-bottom input) of the PCM186x. AC coupled.
•
Vin2
– Pins 1 (red-top input) and 2 (white-bottom input) of the PCM186x. AC coupled.
•
Vin3
– Pins 30 (red-top input) and 29 (white-bottom input) of the PCM186x. AC coupled.
•
Vin4
– Pins 28 (red-top input) and 27 (white-bottom input) of the PCM186x. AC coupled.
•
J6
– J6 can be used to insert an external Mic Bias (remove J9).
•
J7
– Most of the PCM186x GPIO, hardware control, and I2C signals are available here.
6
PCM186xEVM
SLAU615 – December 2014
Copyright © 2014, Texas Instruments Incorporated