KSZ8873FLLI Micrel Inc, KSZ8873FLLI Datasheet - Page 43

• Manufacturer Part Number: KSZ8873FLLI
• Description: IC ETHERNET SWITCH 3PORT 64LQFP
• Manufacturer: Micrel Inc

Specifications of KSZ8873FLLI

• Controller Type: Ethernet Switch Controller
• Interface: MII
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed
• Other names: 576-3632; KSZ8873FLLI

Micrel, Inc.
Near-end (Remote) Loopback
Near-end (Remote) loopback is conducted at either PHY port 1 or PHY port 2.of the KSZ8873MLL/FLL/RLL. 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.
September 2010
Figure 15. Near-end (Remote) Loopback Path
RXP1 /
RXM 1
RXP2 /
RXM 2
PMD/PMA
PMD/PMA
Switch
Port 1
MAC
MAC
PHY
PCS
PCS
Port 2
PHY
43
TXP2 /
TXM 2
TXP1 /
TXM 1
KSZ8873MLL/FLL/RLL
M9999-092309-1.2