ip178a ETC-unknow, ip178a Datasheet - Page 32

• Manufacturer Part Number: ip178a
• Description: 8-port 10/100 Ethernet Integrated Switch
• Manufacturer: ETC-unknow

EEPROM Register Description (continued)
Preliminary, Specification subject to change without notice
IP178A-DS-P05
Sep. 09, 2002
Switch control register 2
02H[3]
02H[2]
02H[1:0]
03H[15:13]
03H[12]
03H[11]
03H[10]
03H[9]
03H[8]
03H[7]
03H[6:5]
03H[4:3]
03H[2]
03H[1]
03H[0]
Offset
Default Value
2’b0
3’b0
00
10
0
0
1
1
0
0
0
0
0
1
0
HASH_MODE[1:0]
MII_P0_FLOW_CTL Flow control of external MII port
Corresponding Pin
MII_P0_EXT_EN
MII_P0_SPEED
AGETIME[1:0]
MII_P0_FULL
BF_STM_EN
ALLPASS
MODBCK
DROP16
-
-
-
-
-
Reserved
Bf_stm_en, Broadcast storm enable
1: enable
0: disable
Reserved
Reserved
Duplex of external MII port
1: full (default), 0: half
Speed of external MII port
1: 10M (default), 0: 100M
1: on, 0: off (default)
External MII port enable
1: enable, 0: disable (default)
Reserved
Drop16,
A port will drop the transmitting packet after 16 consecutive
collisions if this function is turned on.
1: drop, 0: not drop
It is hashing algorithm selection for 1
end of reset.
00: direct and CRC(default)
01: direct and CRC
10: CRC and CRC
11: reserved
Agetime, Aging time of address table selection
IP178A drops the incoming packet if the number of broadcast
packet in queue is over the threshold.
An address tag in hashing table will be removed if this function
is turned on and its aging timer expires.
ALLPASS
IP178A forwards all packets. It is for testing only. The default
value must be adopted for normal operation.
1: turn on, 0: turn off
MODBCK, Turn on modified back off algorithm
The maximum back off period is limited to 8-slot time if this
function is turned on.
1: turn on, 0: turn off
Reserved
32
03H[4:3]
00
01
10
11
Description
Aging time
no aging
120s
240s
480s
st
layer and 2
default
note
(Advance Version)
nd
layer at the
IP178A