KSZ8895MQ_12 MICREL [Micrel Semiconductor], KSZ8895MQ_12 Datasheet - Page 40

• Manufacturer Part Number: KSZ8895MQ_12
• Description: Integrated 5-Port 10/100 Managed Ethernet Switch with MII/RMII interface
• Manufacturer: MICREL [Micrel Semiconductor]

Micrel, Inc.
SNI Interface Operation
The serial network interface (SNI) is compatible with some controllers used for network layer protocol processing.
This interface can be directly connected to these types of devices. The signals are divided into two groups, one for
transmission and the other for reception. The signals involved are described in Table 6.
This interface is a bit-wide data interface, so it runs at the network bit rate (not encoded). An additional signal on the
transmit side indicates when data is valid. Likewise, the receive side has an indicator that shows when the data is
valid.
For half-duplex operation there is a signal that indicates a collision has occurred during transmission.
March 2012
SNI Signal
TXEN
CRS
RXD
RXC
TXD
TXC
COL
Serial Transmit Data
Serial Receive Data
Collision Detection
Transmit Enable
Table 6. SNI Signals
Transmit Clock
Receive Clock
Carrier Sense
Description
40
KSZ8895MQ/RQ/FMQ Signal
KSZ8895MQ/RQ/FMQ
SMRXD[0]
SMTXD[0]
SMRXDV
SMTXEN
SMRXC
SMTXC
SCOL
M9999-032612-1.5