LAN91C111_11 Datasheet, PDF (32/133 Pages) SMSC Corporation – 10/100 Non-PCI Ethernet Single Chip MAC + PHY

10/100 Non-PCI Ethernet Single Chip MAC + PHY
Datasheet
REFERENCE
P
Q
R
S
T
U
V
W
TIME (NS) INTERNAL MAU
110
111
111
111
110
100
110
90
VOLTAGE (V)
0.75
0.15
0
-0.15
-1.0
-0.3
-0.7
-0.7
Transmit Level Adjust
The transmit output current level is derived from an internal reference voltage and the external resistor
on RBIAS pin. The transmit level can be adjusted with either (1) the external resistor on the RBIAS
pin, or (2) the four transmit level adjust bits in the PHY Ml serial port Configuration 1 register as shown
in Table 7.2. The adjustment range is approximately -14% to +16% in 2% steps.
TLVL[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Table 7.2 Transmit Level Adjust
GAIN
1.16
1.14
1.12
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
0.88
0.86
Revision 1.92 (06-27-11)
32
DATASHEET
SMSC LAN91C111 REV C