KSZ8864RMN Micrel Inc, KSZ8864RMN Datasheet - Page 30

• Manufacturer Part Number: KSZ8864RMN
• Description: IC ETHERNET SW 4PORT 64QFN
• Manufacturer: Micrel Inc

Specifications of KSZ8864RMN

• Controller Type: Ethernet Switch Controller
• Interface: MII, RMII
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / RoHS Status: Supplier Unconfirmed
• Current - Supply: -
• Lead Free Status / RoHS Status: Supplier Unconfirmed, Lead free / RoHS Compliant
• Other names: 576-3787; KSZ8864RMN

Micrel, Inc.
KSZ8864RMN
On the transmit side, the KSZ8864RMN has intelligent and efficient ways to determine when to invoke flow control.
The flow control is based on availability of the system resources, including available buffers, available transmit
queues and available receive queues.
The KSZ8864RMN flow controls a port that has just received a packet if the destination port resource is busy. The
KSZ8864RMN issues a flow control frame (XOFF), containing the maximum pause time defined in IEEE standard
802.3x. Once the resource is freed up, the KSZ8864RMN sends out the other flow control frame (XON) with zero
pause time to turn off the flow control (turn on transmission to the port). A hysteresis feature is also provided to
prevent over-activation and deactivation of the flow control mechanism.
The KSZ8864RMN flow controls all ports if the receive queue becomes full.
Figure 4. Destination Address Lookup Flow Chart, Stage 1
30
January 2011
M9999-012011-1.2