KSZ8993M Micrel Inc, KSZ8993M Datasheet - Page 54

• Manufacturer Part Number: KSZ8993M
• Description: IC SWITCH 10/100 3PORT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KSZ8993M

• 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 Supply Voltage (min): 1.71/3.135V
• Power Dissipation: 800mW
• Supply Current: 0.1/0.19A
• Operating Temperature Classification: Commercial
• Data Rate: 100Mbps
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-1037

Port Registers
The following registers are used to enable features that are assigned on a per port basis. The register bit
assignments are the same for all ports, but the address for each port is different, as indicated.
Register 16 (0x10): Port 1 Control 0
Register 32 (0x20): Port 2 Control 0
Register 48 (0x30): Port 3 Control 0
Bit
7
6
5
4
3
2
Micrel, Inc.
April 2005
Name
Broadcast
storm
protection
enable
DiffServ priority
classification
enable
802.1p priority
classification
enable
Port-based
priority
classification
enable
User priority
ceiling
Tag insertion
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
= 1, enable broadcast storm protection for
ingress packets on the port
= 0, disable broadcast storm protection
= 1, enable DiffServ priority classification for
ingress packets on port
= 0, disable DiffServ function
= 1, enable 802.1p priority classification for
ingress packets on port
= 0, disable 802.1p
= 1, ingress packets on the port will be classified
as high priority if “DiffServ” or “802.1p”
classification is not enabled or fails to classify.
= 0, ingress packets on port will be classified as
low priority if “DiffServ” or “802.1p” classification
is not enabled or fails to classify.
Note: “DiffServ”, “802.1p” and port priority can be
enabled at the same time. The OR’ed result of
802.1p and DSCP overwrites the port priority.
= 1, if the packet’s “user priority field” is greater
than the “user priority field” in the port default tag
register, replace the packet’s “user priority field”
with the “user priority field” in the port default tag
register.
= 0, do not compare and replace the packet’s
‘user priority field”
= 1, when packets are output on the port, the
switch will add 802.1p/q tags to packets without
802.1p/q tags when received. The switch will not
add tags to packets already tagged. The tag
inserted is the ingress port’s “port VID”.
= 0, disable tag insertion
54
Default
0
0
Pin value during
reset:
P1_1PEN (port
1)
P2_1PEN (port
2)
P3_1PEN (port
3)
Pin value during
reset:
P1_PP (port 1)
P2_PP (port 2)
P3_PP (port 3)
0
Pin value during
reset:
P1_TAGINS
(port 1)
P2_TAGINS
(port 2)
P3_TAGINS
(port 3)
KS8993M/ML/MI
M9999-041205