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KS8993M Datasheet(PDF) 57 Page - Micrel Semiconductor

Part No. KS8993M
Description  Integrated 3-Port 10/100 Managed Integrated 3-Port 10/100 Managed
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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KS8993M Datasheet(HTML) 57 Page - Micrel Semiconductor

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Micrel, Inc.
KS8993M/ML/MI
April 2005
57
M9999-041205
Register 20 (0x14): Port 1 Control 4
Register 36 (0x24): Port 2 Control 4
Register 52 (0x34): Port 3 Control 4
Bit
Name
R/W
Description
Default
7-0
Default tag
[7:0]
R/W
Port’s default tag, containing
7-0: VID[7:0]
0x01
Note: Registers 19 and 20 (and those corresponding to other ports) serve two purposes:
1.
Associated with the ingress untagged packets, and used for egress tagging.
2.
Default VID for the ingress untagged or null-VID-tagged packets, and used for address lookup.
Register 21 (0x15): Port 1 Control 5
Register 37 (0x25): Port 2 Control 5
Register 53 (0x35): Port 3 Control 5
Bit
Name
R/W
Description
Default
7-0
Transmit high
priority rate
control [7:0]
R/W
This register along with port control 7, bits [3:0]
form a 12-bits field to determine how many
“32Kbps” high priority blocks can be transmitted
in a unit of 4Kbytes in a one second period).
0x00
Register 22 (0x16): Port 1 Control 6
Register 38 (0x26): Port 2 Control 6
Register 54 (0x36): Port 3 Control 6
Bit
Name
R/W
Description
Default
7-0
Transmit low
priority rate
control [7:0]
R/W
This register along with port control 7, bits [7:4]
form a 12-bits field to determine how many
“32Kbps” low priority blocks can be transmitted in
a unit of 4 Kbytes in a one second period).
0x00
Register 23 (0x17): Port 1 Control 7
Register 39 (0x27): Port 2 Control 7
Register 55 (0x37): Port 3 Control 7
Bit
Name
R/W
Description
Default
7-4
Transmit low
priority rate
control [11:8]
R/W
These bits along with port control 6, bits [7:0]
form a 12-bits field to determine how many
“32Kbps” low priority blocks can be transmitted in
a unit of 4Kbytes in a one second period).
0x0
3-0
Transmit high
priority rate
control [11:8]
R/W
These bits along with port control 5, bits [7:0]
form a 12-bits field to determine how many
“32Kbps” high priority blocks can be transmitted
(in a unit of 4Kbytes in a one second period).
0x0
Register 24 (0x18): Port 1 Control 8
Register 40 (0x28): Port 2 Control 8
Register 56 (0x38): Port 3 Control 8
Bit
Name
R/W
Description
Default
7-0
Receive high
priority rate
control [7:0]
R/W
This register along with port control 10, bits [3:0]
form a 12-bits field to determine how many
“32Kbps” high priority blocks can be received in a
unit of 4Kbytes in a one second period).
0x00


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