KSZ8995XA Micrel Inc, KSZ8995XA Datasheet - Page 32
![IC SWITCH 10/100 5PORT 128PQFP](/photos/6/81/68152/576-128-pqfp_sml.jpg)
KSZ8995XA
Manufacturer Part Number
KSZ8995XA
Description
IC SWITCH 10/100 5PORT 128PQFP
Manufacturer
Micrel Inc
Specifications of KSZ8995XA
Applications
*
Mounting Type
Surface Mount
Package / Case
128-MQFP, 128-PQFP
Number Of Primary Switch Ports
5
Internal Memory Buffer Size
64
Operating Supply Voltage (typ)
1.8/2.5/3.3V
Fiber Support
Yes
Integrated Led Drivers
Yes
Phy/transceiver Interface
MII/SNI
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 Temperature Classification
Commercial
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
576-1642 - BOARD EVALUATION FOR KSZ8995XA
Lead Free Status / RoHS Status
Compliant, Lead free / RoHS Compliant
Other names
576-1042
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
KSZ8995XA
Manufacturer:
MICREL
Quantity:
1 334
Company:
Part Number:
KSZ8995XA
Manufacturer:
MICREL30
Quantity:
348
Part Number:
KSZ8995XA
Manufacturer:
MICREL
Quantity:
20 000
September 2008
Address
0
Register 4 (0x04): Global Control 2
7
6
5
4
3
2
1
Name
Aggressive back off
enable
Reserved
Multicast storm
protection disable
Reserved
Flow control and back
pressure fair mode
No excessive collision
drop
Huge packet support
Legal maximum packet
size check disable
Description
1, enable more aggressive back off algorithm in half
duplex mode to enhance performance. This is not an
IEEE standard.
Reserved
1, “Broadcast Storm Protection” does not include
multicast packets. Only DA=FFFFFFFFFFFF
packets will be regulated.
0, “Broadcast Storm Protection” includes DA =
FFFFFFFFFFFF and DA[40] = 1 packets.
Reserved
1, fair mode is selected. In this mode, if a flow
control port and a non-flow control port talk to the
same destination port, packets from the non-flow
control port may be dropped. This is to prevent the
flow control port from being flow controlled for an
extended period of time.
0, in this mode, if a flow control port and a non-flow
control port talk to the same destination port, the
flow control port will be flow controlled. This may not
be “fair” to the flow control port.
1, the switch will not drop packets when 16 or more
collisions occur.
0, the switch will drop packets when 16 or more
collisions occur.
1, will accept packet sizes up to 1916 bytes
(inclusive).
This bit setting will override setting from bit 1 of the
same register.
0, the max packet size will be determined by bit 1 of
this register.
1, will accept packet sizes up to 1536 bytes
(inclusive).
0, 1522 bytes for tagged packets (not including
packets with STPID from CPU to ports 1-4), 1518
bytes for untagged packets. Any packets larger than
the specified value will be dropped.
32
Mode
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Pin PMRXD0 strap
option. Pull-down
(0):
Disable aggressive
back off. Pull-up
(1): Aggressive
backoff. Note:
PMRXD0 has
internal pull-down.
Pin PMRXD1 strap
option. Pull-down
(0):
Drop excessive
collision packets.
Pull-up (1): Don’t
drop excessive
collision packets.
Note: PMRXD1 has
internal pull-down.
Pin PMRXER strap
option. Pull-down
(0):
1518/1522 byte
packets. Pull-up
value will be
dropped. (1): 1536
byte packets
Note: PMRXER
has internal pull-
down.
M9999-091508
Default
1
1
1
1
0