KS8993F Micrel Inc, KS8993F Datasheet - Page 52

• Manufacturer Part Number: KS8993F
• Description: IC CONV MED 10/100 3PORT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KS8993F

• 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): 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 Supply Voltage (max): 1.89/3.465V
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: KS8993F-EVAL - EVAL KIT EXPERIMENTAL KS8993F
• Lead Free Status / RoHS Status: Not Compliant, Lead free / RoHS Compliant

Register 3 (0x03): Global Control 1
Micrel, Inc.
3
2
1
0
Bit
7
6
5
4
3
2
1
0
June 2009
Pass flow
control
packet
Buffer share
mode
Reserved
Link change
age
Name
Pass all
frames
Repeater
Mode
IEEE 802.3x
Transmit
direction flow
control
enable
IEEE 802.3x
Receive
direction flow
control
enable
Frame
Length field
check
Aging enable
Fast age
enable
Aggressive
back off
enable
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
>= : classified as high priority
<
= 1, switch will not filter 802.1x “flow control” packets
= 1, buffer pool is shared by all ports. A port can use more buffer
when other ports are not busy.
= 0, a port is only allowed to use 1/3 of the buffer pool
Reserved
= 1, link change from “link” to “no link” will cause fast aging
Note: If any port is unplugged, all addresses will be automatically aged
Description
= 1, switch all packets including bad ones. Used solely for
= 0, normal mode
= 1, repeater mode (Half duplex Hub mode)
= 1, will enable transmit direction flow control feature.
= 0, will not enable transmit direction flow control feature. Switch
= 1, will enable receive direction flow control feature.
= 0, will not enable receive direction flow control feature. Switch
= 1, will check frame length field in the IEEE packets. If the
= 1, enable age function in the chip
= 0, disable age function in the chip
= 1, turn on fast age (800 us)
= 1, enable more aggressive back off algorithm in half duplex
: classified as low priority
will not generate any flow control packets.
will not react to any received flow control packets.
(<800us) to age address table faster. After an age cycle is
complete, the age logic will return to normal (about 200
seconds).
debugging purposes. Works in conjunction with Sniffer
mode only.
actual length does not match, the packet will be dropped
(for Length/Type field < 1500).
mode to enhance performance. This is not an IEEE
standard.
out.
52
[e-mail]
or [phone]
M9999-062509
0x0
0x1
0
0
Default
0
0
1
1
0
1
0
SMAC
(pin 69)
value during
reset
KS8993F/FL