OS8121X Slim Board Family
DS60001523A-page 20
2017 Microchip Technology Inc.
3.2
PRODUCT FEATURES
• Supports a network speed grade of 50 Mbits/s
• Available for electrical physical layer (ePHY) applications
• Configuration/Debug Header Connector
• One streaming port
• Lock detection monitor (Lock LED)
• Is identified in the network by its node address 0x0210
3.3
FUNCTIONAL DESCRIPTION
gives an overview of the board’s main components.
The OS81214 Slim Microphone Board provides an electrical Physical Layer (ePHY)
interface to the network. The electrical interface is implemented with passive front-end
components [
]. The Power Injector Box provides 12 V that are used to feed the on-
board power supply, which provides 1.8 V INIC core supply and 3.3 V for INIC I/Os and
other components. As long as the output voltage of the power supply is not stable, the
INIC will be hold in reset.
The
Configuration/Debug Header Connector
is used to read, load or customize the
INIC’s initial start-up configuration data.
The two on-board omni-directional
microphones are connected to the INIC via
one I
2
S port. Together, they provide a stereo microphone input.
FIGURE 3-2:
BLOCK DIAGRAM
Configuration/
Debug Header
Connector
1.8 V
3.3 V
Power Supply
INIC
Network
and
PoDL
12 V
I
2
S
TM
Left
Physical
Layer
Interface
Reset
INMP441ACEZ-R7
INMP441ACEZ-R7
Right
