参数资料
| 型号： | KS8999I |
| 厂商： | Micrel Inc |
| 文件页数： | 22/52页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH 9-PORT 10/100 208-PQFP |
| 标准包装： | 100 |
| 系列： | * |
| 类型： | * |
| 应用： | * |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 208-MQFP，208-PQFP |
| 供应商设备封装： | 208-PQFP（28x28） |
| 包装： | 散装 |
| 配用： | 576-1023-ND - BOARD EVAL EXPERIMENT FOR KS8999 |
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January 2005
29
KS8999
Micrel
EEPROM Memory Map
Address
Name
Description
Default
(chip) Value
0
7-0
Signature byte 1. Value = “55”
0x55
1
7-0
Signature byte 2. Value = “99”
0x99
General Control Register
2
7-4
Reserved – set to zero
0000
2
3-2
Priority control scheme (all ports)
00
00 = Transmit all high priority before any low priority
01= Transmit high and low priority at a 10:1 ratio
10 = Transmit high and low priority at a 5:1 ratio
11 = Transmit high and low priority at a 2:1 ratio
2
1
Priority buffer reserve for high priority traffic
0
1 = Reserve 6KB of buffer space for high priority
0 = None reserved
2
0
VLAN enforcement
0
1 = All unicast frames adhere to VLAN configuration
0 = Unicast frames ignore VLAN configuration
Priority Classification Control – 802.1p tag field
3
7
1 = State “111” is high priority
1
0 = State “111” is low priority
3
6
1 = State “110” is high priority
1
0 = State “110” is low priority
3
5
1 = State “101” is high priority
1
0 = State “101” is low priority
3
4
1 = State “100” is high priority
1
0 = State “100” is low priority
3
1 = State “011” is high priority
0
0 = State “011” is low priority
3
2
1 = State “010” is high priority
0
0 = State “010” is low priority
3
1
1 = State “001” is high priority
0
0 = State “001” is low priority
3
0
1 = State “000” is high priority
0
0 = State “000” is low priority
Port 1 Control Register
4
7-6
Reserved – set to zero
00
4
5
TOS priority classification enable for port 1
0
1 = Enable
0 = Disable
4
802.1p priority classification enable for port 1
0
1 = Enable
0 = Disable
4
3
Port based priority classification for port 1
0
1 = High priority
0 = Low priority
4
2
Insert VLAN tags for port 1 if non-existent
0
1 = Enable
0 = Disable
4
1
Strip VLAN tags for port 1 if existent
0
1 = Enable
0 = Disable
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