KSZ8995XA Micrel Inc, KSZ8995XA Datasheet - Page 33

• 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

September 2008
Address
0
Register 5 (0x05): Global Control 3
7
6
5
4
3-2
1
0
Register 6 (0x06): Global Control 4
7
6
5
4
3
2-0
Name
Priority buffer reserve
Reserved
Reserved
Reserved
Reserved
Priority scheme select
Reserved
Sniff mode select
Switch MII back
pressure enable
Switch MII half
duplex mode
Switch MII flow
control enable
Switch MII 10BT
Null VID replacement
Broadcast storm
protection rate bit [10:8]
Description
1, each output queue is pre-allocated 48 buffers,
used exclusively for high priority packets. It is
recommended to enable this when priority queue
feature is turned on.
0, no reserved buffers for high priority packets.
Reserved
Reserved
Reserved
Reserved
00 = always deliver high priority packets first.
01 = deliver high/low packets at ratio 10/1.
10 = deliver high/low packets at ratio 5/1.
11 = deliver high/low packets at ratio 2/1.
Reserved
1, will do Rx AND Tx sniff (both source port and
destination port need to match).
0, will do Rx OR Tx sniff (either source port or
destination port needs to match). This is the mode
used to implement Rx only sniff.
1, enable half-duplex back pressure on switch MII
interface.
0, disable back pressure on switch MII interface.
1, enable MII interface half-duplex mode.
0, enable MII interface full-duplex mode.
1, enable full-duplex flow control on switch MII
interface.
0, disable full-duplex flow control on switch MII
interface.
1, the switch interface is in 10Mbps mode.
0, the switch interface is in 100Mbps mode.
1, will replace null VID with port VID (12 bits).
0, no replacement for null VID.
This along with the next register determines how
many “64 byte blocks” of packet data allowed on an
input port in a preset period. The period is 50ms for
100BT or 500ms for 10BT. The default is 1%.
33
Mode
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Pin SMRXD2 strap
option. Pull-down
(0): Full-duplex
mode.
Pull-up (1): Half
duplex mode.
Note: SMRXD2 has
internal pull down.
Pin SMRXD3 strap
option. Pull-down
(0): disable flow
control. Pull-up (1):
enable flow control
Note: SMRXD3 has
internal pull-down.
Pin SMRXD1 strap
option. Pull-down
(0):
Enable 100Mbps
Pull-up (1): Enable
10Mpbs.
Note: SMRXD1 has
internal pull-down.
M9999-091508
Default
000
00
0
0
0
0
0
0
0
0
0