參數(shù)資料
型號(hào): KSZ8995MAI
廠商: Micrel Inc
文件頁(yè)數(shù): 51/89頁(yè)
文件大?。?/td> 0K
描述: IC SWITCH 5-PORT 10/100 128PQFP
標(biāo)準(zhǔn)包裝: 66
系列: *
類(lèi)型: *
應(yīng)用: *
安裝類(lèi)型: 表面貼裝
封裝/外殼: 128-BFQFP
供應(yīng)商設(shè)備封裝: 128-PQFP(14x20)
包裝: 托盤(pán)
產(chǎn)品目錄頁(yè)面: 1081 (CN2011-ZH PDF)
配用: 576-1607-ND - BOARD EVAL EXPERIMENT KSZ8995MA
其它名稱: 576-2126
KSZ8995MAI-ND
Micrel, Inc.
KS8995MA/FQ
October 2011
55
M9999-102611-3.0
Port Registers (Continued)
Address
Name
Description
Mode
Default
Register 18 (0x12): Port 1 Control 2
Register 34 (0x22): Port 2 Control 2
Register 50 (0x32): Port 3 Control 2
Register 66 (0x42): Port 4 Control 2
Register 82 (0x52): Port 5 Control 2
3
Back Pressure Enable
1, enable port half-duplex back pressure.
0, disable port half-duplex back pressure.
R/W
Pin PMRXD2
strap option.
Pull-down
(0): disable
back
pressure.
Pull-up(1):
enable back
pressure.
Note:
PMRXD2 has
internal pull-
down.
2
Transmit Enable
1, enable packet transmission on the port.
0, disable packet transmission on the port.
R/W
1
Receive Enable
1, enable packet reception on the port.
0, disable packet reception on the port.
R/W
1
0
Learning Disable
1, disable switch address learning capability.
0, enable switch address learning.
R/W
0
Note:
Bits 2-0 are used for spanning tree support. See “Spanning Tree Support” section.
Address
Name
Description
Mode
Default
Register 19 (0x13): Port 1 Control 3
Register 35 (0x23): Port 2 Control 3
Register 51 (0x33): Port 3 Control 3
Register 67 (0x43): Port 4 Control 3
Register 83 (0x53): Port 5 Control 3
7
0
Default Tag [15:8]
Port’s default tag, containing:
7-5: user priority bits
4: CFI bit
3-0 : VID[11:8]
R/W
0
Register 20 (0x14): Port 1 Control 4
Register 36 (0x24): Port 2 Control 4
Register 52 (0x34): Port 3 Control 4
Register 68 (0x44): Port 4 Control 4
Register 84 (0x54): Port 5 Control 4
7
0
Default Tag [7:0]
Default port 1’s tag, containing:
7-0: VID[7:0]
R/W
1
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 look up.
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