Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
Table 7.7 LAN Interface Signals
VIH VIL IOH
NAME
IOL
VOL
VOH
TXP
TXN
RXP
RXN
See Table 7.12, “100Base-TX Transceiver Characteristics,” on page 72 and Table 7.13,
“10BASE-T Transceiver Characteristics,” on page 72.
Table 7.8 LED Signals
NAME
VIH (V)
VIL (V)
IOH
IOL
VOL (V)
VOH (V)
LED1/REGOFF
LED2/nINTSEL
0.63 * VDD2A 0.39 * VDD2A -12 mA +12 mA
0.63 * VDD2A 0.39 * VDD2A -12 mA +12 mA
+0.4
+0.4
VDD2A – +0.4
VDD2A – +0.4
Table 7.9 Configuration Inputs
NAME
VIH (V)
VIL (V)
IOH
IOL
VOL (V)
VOH (V)
RXD0/MODE0
RXD1/MODE1
RXER/PHYAD0
CRS_DV/MODE2
0.68 * VDDIO 0.39 * VDDIO
0.68 * VDDIO 0.39 * VDDIO
0.68 * VDDIO 0.39 * VDDIO
0.68 * VDDIO 0.39 * VDDIO
-8 mA
-8 mA
-8 mA
-8 mA
+8 mA
+8 mA
+8 mA
+8 mA
+0.4
+0.4
+0.4
+0.4
VDDIO – +0.4
VDDIO – +0.4
VDDIO – +0.4
VDDIO – +0.4
Table 7.10 General Signals
VIL (V) IOH
NAME
VIH (V)
IOL
VOL (V)
VOH (V)
nINT/REFCLKO
nRST
-8 mA +8 mA
+0.4
VDDIO – +0.4
0.63 * VDDIO 0.39 * VDDIO
XTAL1/CLKIN (Note 7.5)
XTAL2
+1.40 V
-
0.39 * VDD2A
-
Note 7.5 These levels apply when a 0-3.3V Clock is driven into XTAL1/CLKIN and XTAL2 is floating.
The maximum input voltage on XTAL1/CLKIN is VDD2A + 0.4V.
Table 7.11 Internal Pull-Up / Pull-Down Configurations
NAME
PULL-UP OR PULL-DOWN
TXEN
Pull-down
Pull-up
RXD0/MODE0
SMSC LAN8720/LAN8720i
Revision 1.0 (05-28-09)
DATA7S1HEET
SMSC [ SMSC CORPORATION ]
