ST20-GP1 datasheet(71/116 Pages) STMICROELECTRONICS

номер детали	ST20-GP1

подробное описание детали	GPS PROCESSOR

PDF	116 Pages

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производитель	STMICROELECTRONICS [STMicroelectronics]

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ST20-GP1

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12.3 OS-Link connections

Links are TTL compatible and intended to be used in electrically quiet environments, between

devices on a single printed circuit board or between two boards via a backplane. Direct connection

may be made between devices separated by a distance of less than 300 mm. For longer distances

a matched 100 ohm transmission line should be used with series matching resistors (RM), see

Figure 12.3. When this is done the line delay should be less than 0.4 bit time to ensure that the

reﬂection returns before the next data bit is sent. Buffers may be used for very long transmissions,

see Figure 12.4. If so, their overall propagation delay should be stable within the skew tolerance of

the link, although the absolute value of the delay is immaterial.

Figure 12.2 OS-Links directly connected

Figure 12.3 OS-Links connected by transmission line

Figure 12.4 OS-Links connected by buffers

OSLinkOut

OSLinkIn

OSLinkOut

OSLinkIn

OSLinkOut

Zo=100 ohms

OSLinkOut

OSLinkIn

OSLinkOut

buffers

ST20-GP1 датащи(PDF) 71 Page - STMicroelectronics