Seco COMe-C55-CT6 User Manual page 30

3.2.5.1 Audio interface signals
The COMe-C55-CT6 module supports HD audio format, thanks to native support offered by the processor to this audio codec standard. Up to 3 HD audio codecs
on the carrier board can be supported.
Here following the signals related to HD Audio interface:
HDA_SYNC: HD Audio Serial Bus Synchronization. 48kHz fixed rate output from the module to the Carrier board, electrical level +3.3V_ALW.
HDA_RST#: HD Audio Codec Reset. Active low signal, output from the module to the Carrier board, electrical level +3.3V_ALW.
HDA_BITCLK: HD Audio Serial Bit Clock signal. 24MHz serial data clock generated by the Intel HD audio controller, output from the module to the Carrier board,
electrical level +3.3V_ALW.
HDA_SDOUT: HD Audio Serial Data Out signal. Output from the module to the Carrier board, electrical level +3.3V_ALW.
HDA_SDIN[0..2]: HD Audio Serial Data In signal. Inputs to the module from the Codec(s) placed on the Carrier board, electrical level +3.3V_ALW. HDA_SDIN2 is not
managed by the PCH, it only has a 100kΩ pull-down resistor on the module.
The first four signals have to be connected to all the HD Audio codecs present on the carrier board. For each Codec, only one HDA_SDIN signal must be used .
Please refer to the chosen Codecs
3.2.5.2 Gigabit Ethernet signals
The Gigabit Ethernet interface is realised, on COMe-C55-CT6 module, using an Intel
which is interfaced to the PCH through PCI-express lane #5.
Here following the signals involved in Gigabit Ethernet management
GBE0_MDI0+/GBE0_MDI0-: Media Dependent Interface (MDI) I/O differential pair #0
GBE0_MDI1+/GBE0_MDI1-: Media Dependent Interface (MDI) I/O differential pair #1
GBE0_MDI2+/GBE0_MDI2-: Media Dependent Interface (MDI) I/O differential pair #2, only used for 1Gbps Ethernet
mode (not for 10/100Mbps modes)
GBE0_MDI3+/GBE0_MDI3-: Media Dependent Interface (MDI) I/O differential pair #3, only used for 1Gbps Ethernet
mode (not for 10/100Mbps modes)
GBE0_ACT#: Ethernet controller activity indicator, Active Low Output signal, electrical level +3.3V_ALW.
GBE0_LINK#: Ethernet controller link indicator, Active Low Output signal, electrical level +3.3V_ALW.
GBE0_LINK100#: Ethernet controller 100Mbps link indicator, Active Low Output signal, electrical level +3.3V_ALW.
GBE0_LINK1000#: Ethernet controller 1Gbps link indicator, Active Low Output signal, electrical level +3.3V_ALW.
COMe-C55-CT6
COMe-C55-CT6 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by L.V. Copyright © 2020 SECO S.p.A.
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Reference Design Guide for correct implementation of audio section on the carrier board.
®
I219 Gigabit Ethernet controller,
D2
R1 R-249
GBE_LINK1000#
G
Y
D1
R2 R-249
GBE_LINK100#
2
GBE_CTREF
9
GBE_MDI0+
10
GBE_MDI0-
0.1uF
7
GBE_MDI1+
8
GBE_MDI1-
0.1uF
5
GBE_MDI2+
6
GBE_MDI2-
0.1uF
3
GBE_MDI3+
4
GBE_MDI3-
0.1uF
1
D4
R3 R-249
GBE_ACT#
G
Y
D3
R4 R-249
GBE_LINK#
LPJG16314A4NL
CN1
1
75
2
3
75
6
4
75
5
7
75
8
1000pF
2kV
SHIELD GND
30