LAN83C183 Datasheet, PDF (26/113 Pages) SMSC Corporation – FAST ETHERNET PHYSICAL LAYER DEVICE

Table 1.5 TP Output Voltage - 10 Mbits/s (Cont.)
Reference
S
T
U
V
W
Time (ns) Internal MAU
111
110
100
110
90
Voltage (V)
−0.15
−1.0
−0.3
−0.7
−0.7
1.2.7.3 TRANSMIT LEVEL ADJUST
The transmit output current level is derived from an internal reference voltage and
the external resistor on the REXT pin. The transmit level can be adjusted with either:
• The external resistor on the REXT pin, or
• The four Transmit Level Adjust bits (TLVL[3:0]) in the MI serial port Configuration
1 register as shown in Table 1.6. The adjustment range is approximately -14%
to +16% in 2% steps.
Table 1.6 Transmit Level Adjust
TLVL[3:0]
Bits
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
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
SMSC DS – LAN83C183
26
Rev. 12/14/2000