DIGITAL-LOGIC SmartModule Express SMX945 Bedienungsanleitung PDF herunterladen (Seite 52)

Kontron Compact Computers AG SMX945 Detailed Manual V1.1

The module's transmit and receive insertion-loss budgets are different due to the presence of the coupling

caps in the module transmit path. The module transmit path insertion-loss budget shall be 4.65 dB (3.46 dB

+ 1.19 dB). The module receive-path insertion-loss budget shall be 3.46 dB. COM Express™ connector loss

is accounted for separately.

The carrier board's transmit and receive insertion-loss budgets are different due to the presence of the

coupling caps in the carrier board transmit path. The carrier board transmit path insertion-loss budget shall

be 9.49 dB (8.30 dB + 1.19 dB). The carrier board receive path insertion-loss shall be 8.30 dB. COM

Express™ connector loss is accounted for separately.

Signal Description I/O Termination Remarks

AC_RST# CODEC Reset O 3.3V

AC_SYN Serial Bus Synchronization O 3.3V AC_SYNC is a boot strap

AC_SYNC is a boot strap

AC_BIT_CLK 12.228MHz Serial Bit Clock

from CODEC

O 3.3V

AC_SDOUT Audio Serial Data Output to

CODEC

O 3.3V AC_SDOUT is a boot strap signal

(see note below)

AC_SDIN[0-2] Audio Serial Data Input from

CODEC0-CODEC2

I 3.3V Only AC_SDIN2 is PD 10k

Note...

Not available: CODECDISABLE Disable onboard Audio Codec I 3.3V PD 10k

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DIGITAL-LOGIC SmartModule Express SMX945 Bedienungsanleitung Seite 52