10 Design Guide
Intel® 31244 PCI-X to Serial ATA Controller
About This Document
PCB
Printed circuit board.
Example manufacturing process consists of
the following steps:
• Consists of al ter n atin g l ay ers o f core an d
prepreg stacked
• The finish ed PCB is heated and cured.
• The via holes are drilled
• Plating covers holes and outer surfaces
• Etching removes unwanted copper
• Board is tinned, coated with solder mask
and silk screened
JEDEC Provides standards for the semiconductor ind ustry.
Aggressor
A network that transmit s a coupled signal to another network is aggr essor network.
Victim A network that receives a coupled cr os s-t a lk si gnal fro m a not h er n etw ork is a c al led t he vi cti m
network
Network The trace of a PCB that completes an electrical connection between two or more
components.
Stub Branch fr om a trunk terminating at the pad of an agent.
CRB Customer Reference Board
HBA Host Bus Adapter
TX + / TX - These signals are the outbound high-speed differential signals that are connected to the
serial ATA cable.
RX + / RX - These signals are the inbound high-speed differential signals that are connected to the serial
ATA cable.
TX This is a transmit port that contains the basic high-speed driver electronics.
RX This is a receiver port contains the basic high-speed receiver electronics.
Termination
calibration This block is used to establish th e impedance of the RX block in order to properly terminate
the high-speed s erial cable.
PLL This block is used to synchronize an internal clocking reference so t hat the input high-speed
data stream may be properly decoded.
Voltage
Regulator
This block stabilizes the internal voltages used in the other blocks so that reliable operation
may be achieved. This blo c k may or may not be required for proper operation of the balance
of the circuitry. The need for this block is implementatio n specific.
TxData Serially encoded 10b da ta attached to the hig h-speed serial diffe rential line driver.
Table 2. Terminology and Definition (Sheet 2 of 3)
Term Definition
Layer 1: copper
Prepreg
Layer 2: GND
Core
Layer 3: VCC
Layer 4: copper
Prepreg
Example of a Four-Layer Stack
Aggressor Network
Victim Network
Zo
Zo Zo
Zo