KSZ8895 INFINEON [Infineon Technologies AG], KSZ8895 Datasheet - Page 41

• Manufacturer Part Number: KSZ8895
• Description: Integrated 5-Port 10/100 Managed Ethernet Switch with MII/RMII interface
• Manufacturer: INFINEON [Infineon Technologies AG]

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 5.
This interface is a bit-wide data interface and therefore 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 conveys
when the data is valid.
For half-duplex operation there is a signal that indicates a collision has occurred during transmission.
January 2011
SNI Signal
TXEN
CRS
TXD
TXC
COL
RXD
RXC
Serial Transmit Data
Serial Receive Data
Collision Detection
Table 6. SNI Signals
Transmit Enable
Transmit Clock
Receive Clock
Carrier Sense
Description
41
KSZ8895MQ/RQ/FMQ
SMRXD[0]
SMTXD[0]
SMRXDV
SMTXEN
SMRXC
SMTXC
Signal
SCOL
KSZ8895MQ/RQ/FMQ
M9999-012011-1.2