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IP175C/IP175C LF/IP175CH/IP175CH LF
Data Sheet
2.6
MII/RMII
IP175C/IP175CH supports three MII/RMII ports. The block diagram and detail configuration are shown
below. It is noted that MII2 and MII1 MAC mode can’t be enabled at the same time. That is, user should
not use MII2 if pin 54 MII1_PHY_MOD is pulled low.
Access Point /
HomePNA/
VOIP
MAC 0
MAC 1
MAC 2
MAC 3
MAC 4
MAC 5
PHY 0
PHY 1
PHY 2
PHY 3
PHY 4
MII0 / RMII0
MII2 / RMII2
MII1 / RMII1
TP
CPU
Switch Engine
I/F
mode
Int
ext
p4ext
mii1
_dis
mii2
_en
p4mii
_sni
rmii_
en
mii0_mac
_mod
mii1_phy
_mode
mii2_mac
_mod
MII0
MII
PHY mode MAC5 MAC
1
X
X
0
0
0
X
X
MII
MAC mode MAC5 PHY
1
X
X
0
0
1
X
X
RMII MAC
MAC5 Note1
1
X
X
0
1
X
X
X
SNI
PHY mode MAC5 MAC
1
X
X
1
0
0
X
X
SNI
MAC mode MAC5 PHY
1
X
X
1
0
1
X
X
MII1
MII
PHY mode PHY4 MAC
1
0
X
X
0
X
1
X
MII
MAC mode MAC4 PHY
1
0
0
X
0
X
0
X
RMII PHY mode PHY4 MAC
1
0
X
X
1
X
1
X
RMII MAC mode MAC4 PHY
1
0
0
X
1
X
0
X
MII2
MII
PHY mode MAC4 MAC
1
X
1
X
0
X
X
0
MII
MAC mode MAC4 PHY
1
X
1
X
0
X
X
1
RMII
MAC
MAC4 Note1
1
X
1
X
1
X
X
X
Note1: The port can be connected to an external PHY or MAC device.
Note2: All ports are configured as MII/RMII by pin 113 RMII_EN. Each port can be configured as
MII/RMII by programming MII register 31.5[10:8].
Note3: RMII_EN takes precedence of P4MII_SNI.
Abbreviation:
I/F: the type of interface
Mode: the port works as a MAC or a PHY
Int: the internal block to which the MII port is connected
Ext: the external device to which the MII port is connected
MAC4: the port 4 of switch engine
MAC5: the port 5 of switch engine
PHY4: the port 4 of PHY
Mar 09, 2007
36/111
Copyright © 2004, IC Plus Corp.
IP175C/IP175CH-DS-R14
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