KSZ8841-16MVLI TR Micrel, KSZ8841-16MVLI TR Datasheet - Page 42
KSZ8841-16MVLI TR
Manufacturer Part Number
KSZ8841-16MVLI TR
Description
Ethernet ICs Single Ethernet Port + Generic (8, 16-bit) bus interface(Lead Free)
Manufacturer
Micrel
Datasheet
1.KSZ8841-16MVL_TR.pdf
(105 pages)
Specifications of KSZ8841-16MVLI TR
Rohs
yes
Product
Ethernet Controllers
Package / Case
LQFP-128
Mounting Style
SMD/SMT
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Loopback Support
The KSZ8841M provides Near-end (Remote) loopback support for remote diagnostic of failure. In loopback mode, the
speed at the PHY port will be set to 100BASE-TX full-duplex mode.
Near-end (Remote) Loopback
Near-end (Remote) loopback is conducted at PHY port 1of the KSZ8841M. The loopback path starts at the PHY port’s
receive inputs (RXP1/RXM1), wraps around at the same PHY port’s PMD/PMA, and ends at the PHY port’s transmit
outputs (TXP1/TXM1).
Bit [1] of register P1PHYCTRL is used to enable near-end loopback for port 1. Alternatively, Bit [9] of register P1SCSLMD
can also be used to enable near-end loopback. The ports 1 near-end loopback path is illustrated in the following Figure
12.
October 2007
Micrel, Inc.
RXP1 /
RXM1
Figure 12. PHY Port 1 Near-end (Remote) Loopback Path
Bus I/F Unit
PMD1/PMA1
Near-end (remote)
QMU/DMA
RXQ/TXQ
PHY Port 1
MAC1
PCS1
Loopback
42
TXP1 /
TXM1
KSZ8841-16/32 MQL/MVL/MBL
M9999-102207-1.6
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