User manual

Kontron Compact Computers AG SMX945 Detailed Manual V1.1
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Signal Description I/O Termination Remarks
SATA0_RX+ Serial ATA channel 0 I SATA SATA-Spec. 1.0a
SATA0_RX- Receive Input differential pair
SATA0_TX+ Serial ATA channel 0 O SATA SATA-Spec. 1.0a
SATA0_TX- Transmitter Output differential pair
SATA1_RX+ Serial ATA channel 1 I SATA SATA-Spec. 1.0a
SATA1_RX- Receive Input differential pair
SATA1_TX+ Serial ATA channel 1 O SATA SATA-Spec. 1.0a
SATA1_TX- Transmitter Output differential pair
The COM Express™ SATA insertion-loss budgets, presented below, represent the material losses and do
not include cross-talk losses. The COM Express™ SATA insertion-loss budgets are a guideline: module and
carrier board vendors should not exceed the values shown in the tables below.
The Serial ATA source specification provides insertion-loss figures only for the SATA cable. There are
several cable types defined with insertion-losses ranging from 6 dB up to 16 dB. Cross-talk losses are
separate from material losses in the SATA specification.