KS8893MQL Micrel Inc, KS8893MQL Datasheet - Page 54
![IC MANAGED SWITCH 10/100 128PQFP](/photos/6/81/68152/576-128-pqfp_sml.jpg)
KS8893MQL
Manufacturer Part Number
KS8893MQL
Description
IC MANAGED SWITCH 10/100 128PQFP
Manufacturer
Micrel Inc
Specifications of KS8893MQL
Applications
*
Mounting Type
Surface Mount
Package / Case
128-MQFP, 128-PQFP
Number Of Primary Switch Ports
3
Internal Memory Buffer Size
32
Operating Supply Voltage (typ)
3.3V
Fiber Support
Yes
Integrated Led Drivers
Yes
Power Supply Type
Analog/Digital
Package Type
PQFP
Data Rate (typ)
10/100Mbps
Vlan Support
Yes
Operating Temperature (max)
70C
Operating Temperature (min)
0C
Pin Count
128
Mounting
Surface Mount
Jtag Support
No
Operating Supply Voltage (max)
3.5V
Operating Supply Voltage (min)
3.1V
Operating Temperature Classification
Commercial
Data Rate
100Mbps
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
576-1457
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Loopback Support
The KSZ8893MQL/MBL provides loopback support for remote diagnostic of failure. In loopback mode, the speed
at both PHY ports needs to be set to 100BASE-TX. Two types of loopback are supported: Far-end Loopback
and Near-end (Remote) Loopback.
Far-end Loopback
Far-end loopback is conducted between the KSZ8893MQL/MBL’s two PHY ports. The loopback path starts at the
“Originating.” PHY port’s receive inputs (RXP/RXM), wraps around at the “loopback” PHY port’s PMD/PMA, and
ends at the “Originating” PHY port’s transmit outputs (TXP/TXM).
Bit [0] of registers 29 and 45 is used to enable far-end loopback for ports 1 and 2, respectively. Alternatively, the
MII Management register 0, bit [14] can be used to enable far-end loopback.
The far-end loopback path is illustrated in the following figure.
December 2007
R X P /
R X M
Figure 12: Far-End Loopback Path
P M D /P M A
P M D /P M A
S w itc h
O riginating
L oop B ack
P H Y P o rt
P H Y P o rt
M A C
M A C
P C S
P C S
54
T X P /
T X M
M9999-121007-1.5