參數(shù)資料
型號: ST20GP6
英文描述: MAX 7000 CPLD 256 MC 208-RQFP
中文描述: GPS處理器
文件頁數(shù): 71/116頁
文件大?。?/td> 1107K
代理商: ST20GP6
ST20-GP1
71/116
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
OSLinkIn
OSLinkOut
OSLinkOut
OSLinkIn
OSLinkIn
OSLinkOut
RM
RM
Zo=100 ohms
Zo=100 ohms
OSLinkOut
OSLinkIn
OSLinkIn
OSLinkOut
buffers
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