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ESM-BYT User’s Manual

2.4.2.1 Signal Description – COM Express Connector 1 (CN1A)

2.4.2.1.1 Audio Signals

Signal

Signal Description

AC_HDA_SYNC

HD Audio Sync

AC_HDA _RST#

HD Audio Reset

AC_HDA _SDIN[0:2]

Audio CODEC Serial Data

AC_HDA _BITCLK

HD Audio Clock

AC_HDA _SDOUT

HD Audio Data

2.4.2.1.2 Gigabit Ethernet Signals

Signal

Signal Description

GBE0_MD[0:3] +/-

Gigabit Ethernet Controller 0: Media Dependent Interface Differential Pairs 0,1,2,3.

The MDI can operate in 1000, 100 and 10 Mbit / sec modes. Some pairs are

unused in some modes, per the following:

1000B-T

100B-T

10B-T

MDI[0]+/-

B1_DA+/

TX+/-

MDI[1]+/

B1_DB+/

RX+/-

MDI[2]+/

B1_DC+/

MDI[3]+/

B1_DD+/

GBE0_ACT#

Gigabit Ethernet Controller 0 activity indicator, active low.

GBE0_Link#

Gigabit Ethernet Controller 0 link indicator, active low.

GBE0_Link100#

Gigabit Ethernet Controller 0 100 Mbit / sec link indicator, active low.

GBE0_Lin1000#

Gigabit Ethernet Controller 0 1000 Mbit / sec link indicator, active low.

2.4.2.1.3 GPIO Signals

Signal

Signal Description

GPI[0:4]

General purpose input pins.

GPO[0:4]

General purpose output pins.

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 75 76

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