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IP178C/IP178C LF/IP178CH/IP178CH LF
Datasheet
Pin description (continued)
Pin no.
Label
Type
Description
LED.
89, 90,
91, 93,
96, 97,
99, 100
LINK_LED [7:0]
O
LINK LED
The detail functions are illustrated in the following table. It
should be connected to VCC_O through a LED and a resistor.
Application circuit
VCC_O
LINK_LED
R
66, 67,
68, 69,
70, 71,
72, 73
SPEED_LED [7:0]
O
SPEED LED
The detail functions are illustrated in the following table. It
should be connected to VCC_O through a LED and a resistor.
75, 76,
77, 78,
79, 85,
86, 87
FDX_LED [7:0]
O
FDX LED
The detail functions are illustrated in the following table. It
should be connected to VCC_O through a LED and a resistor.
The function is valid only if pin 53 EXTMII_EN is pulled low.
80, 81
LED_SEL [1:0]
IPH2
LED function selection
The data on these pins are latched at the end of reset to
select LED modes. The default value is mode 3. The detail
functions are illustrated in the following table.
After reset, these two pins becomes MII interface TXEN and
TXD3 if pin 53 EXTMII_EN is pulled high.
LED_SEL [1:0]
LED mode
LINK_LED [7:0]
SPEED_LED [7:0]
FDX_LED [7:0]
00
Mode 0
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
Mode 1
Off: link fail
On: link ok
Flash: Rx
Off: 10 Mbps
On: 100 Mbps
Off: half duplex
On: full duplex
Flash: collision
10
Mode 2
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
11 (default)
Mode 3
Off: link fail
On: link ok
Flash: Tx/Rx
Off: 10 Mbps
On: 100 Mbps
Off: half duplex
On: full duplex
Flash: collision
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June 21, 2007
Copyright © 2004, IC Plus Corp.
IP178Cx-DS-R12
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