參數(shù)資料
型號： KSZ8995MAI
廠商： Micrel Inc
文件頁數(shù)： 46/89頁
文件大小： 0K
描述： IC SWITCH 5-PORT 10/100 128PQFP
標(biāo)準(zhǔn)包裝： 66
系列： *
類型： *
應(yīng)用： *
安裝類型： 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
產(chǎn)品目錄頁面： 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
50
M9999-102611-3.0
Global Registers (Continued)
Address
Name
Description
Mode
Default
Register 4 (0x04): Global Control 2
1
Legal Maximum Packet
Size Check Disable
1, will accept packet sizes up to 1536 bytes (inclusive).
0, 1522 bytes for tagged packets (not including packets with
STPID from CPU to ports 1-4), 1518 bytes for untagged
packets. Any packets larger than the specified value will be
dropped.
R/W
Pin PMRXER strap
option. Pull-down
(0): 1518/1522 byte
packets. Pull-up (1):
1536 byte packets.
Note: PMRXER has
internal pull-down.
0
Priority Buffer Reserve
1, each output queue is pre-allocated 48 buffers, used
exclusively for high priority packets. It is recommended to
enable this when priority queue feature is turned on.
0, no reserved buffers for high priority packets.
R/W
0
Address
Name
Description
Mode
Default
Register 5 (0x05): Global Control 3
7
802.1q VLAN Enable
1, 802.1q VLAN mode is turned on. VLAN table needs to set up
before the operation.
0, 802.1q VLAN is disabled.
R/W
0
6
IGMP Snoop Enable on
Switch MII Interface
1, IGMP snoop enabled. All the IGMP packets will be forwarded
to Switch MII port.
0, IGMP snoop disabled.
R/W
0
5
Enable Direct Mode on
Switch MII Interface
1, direct mode on port 5. This is a special mode for the
Switch MII interface. Using preamble before MRXDV to direct
switch to forward packets, bypassing internal look-up.
0, normal operation.
R/W
0
4
Enable Pre-Tag on
Switch MII Interface
1, packets forwarded to Switch MII interface will be
pre-tagged with the source port number (preamble
before MRXDV).
0, normal operation.
R/W
0
3
2
Priority Scheme Select
00 = always deliver high priority packets first.
01 = deliver high/low packets at ratio 10/1.
10 = deliver high/low packets at ratio 5/1.
11 = deliver high/low packets at ratio 2/1.
R/W
00
1
Enable “Tag” Mask
1, the last 5 digits in the VID field are used as a mask to
determine which port(s) the packet should be forwarded to.
0, no tag masks.
R/W
0
Sniff Mode Select
1, will do Rx AND Tx sniff (both source port and destination port
need to match).
0, will do Rx OR Tx sniff (Either source port or destination port
needs to match).
This is the mode used to implement Rx only sniff.
R/W
0
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