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KS8893ML Datasheet(PDF) 48 Page - Micrel Semiconductor

Part # KS8893ML
Description  Integrated 3-Port 10/100 Managed Switch with PHYs Preliminary Data Sheet Rev. 1.0
PDF  106 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

KS8893ML Datasheet(HTML) 48 Page - Micrel Semiconductor

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Micrel
KS8893M/ML/MI
June 2005
48
M9999-063005
Near-end (Remote) Loopback
Near-end (Remote) loopback is conducted at either PHY port 1 or PHY port 2.of the KS8893M. The loopback
path starts at the PHY port’s receive inputs (RXPx/RXMx), wraps around at the same PHY port’s PMD/PMA, and
ends at the PHY port’s transmit outputs (TXPx/TXMx).
Bit [1] of registers 26 and 42 is used to enable near-end loopback for ports 1 and 2, respectively. Alternatively,
the MII Management register 31, bit [1] can be used to enable near-end loopback.
The near-end loopback paths are illustrated in the following figure.
TXP1 /
TXM1
RXP1 /
RXM1
RXP2 /
RXM2
TXP2 /
TXM2
PHY
Port 1
PHY
Port 2
PMD/PMA
PCS
MAC
Switch
MAC
PCS
PMD/PMA
Figure 13. Near-end (Remote) Loopback Path



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