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IP178C/IP178C LF/IP178CH/IP178CH LF
Datasheet
58/93
June 21, 2007
Copyright © 2004, IC Plus Corp.
IP178Cx-DS-R12
PHY
MII
ROM
R/W
Description
Default
Switch control register 1
30
1[15]
3[7]
PRIORITY_RATE
1: 8 packets
0: 4 packets
Output Queue Scheduling: high priority packet rate
1’b0
LED_O_SEL
LED mode selection
LinK_LED
SPEED_LED
FDX_LED
00
Off: link fail
On:
10
Mbps
link ok
Flash: Tx/Rx
Off: link fail
On: 100 Mbps
link ok
Flash: Tx/Rx
Off: half duplex
On: full duplex
01
Off: link fail
On: link ok
Flash: Rx
Off: 10 Mbps
On: 100 Mbps
Off: half duplex
On: full duplex
Flash: collision
10
Off: link fail
On:
10
Mbps
link ok
Flash: Tx/Rx
Off: link fail
On: 100 Mbps
link ok
Flash: Tx/Rx
Off: half duplex
On: full duplex
Flash: collision
30
1[14:13]
3[6:5]
11
Off: link fail
On: link ok
Flash: Tx/Rx
Off: 10 Mbps
On: 100 Mbps
Off: half duplex
On: full duplex
Flash: collision
P(1,1)
30
1[12]
3[4]
Reserved
1'b0
30
1[11]
3[3]
Drop16
1: enable, 0:disable
1’b0
30
1[10]
3[2]
X_EN, IEEE 802.3x flow control enable
1: enable, 0:disable
P(1)
30
1[9]
3[1]
EXT_MII_X_EN, MII port IEEE 802.3x flow control enable
1: enable, 0:disable
1’b1
30
1[8]
3[0]
BK_EN, Backpressure enable
1: enable, 0: disable
P(1)
30
1[7]
2[7]
BP_KIND, Backpressure type selection
It is valid only if Bk_en is set to 1’b1.
0: carrier base backpressure
1: reserved
1’b0
30
1[6]
2[6]
BF_STM_EN, Broadcast storm enable
1: enable
IP178C/IP178CH drops the incoming packet if the number of
broadcast packet in queue is over the threshold.
0: disable
P(0)
30
1[4]
2[4]
LDPS_DIS
Disable link down power saving mode
0: enable link down power saving mode (default)
1: disable link down power saving mode
P(0)
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