LM3S6918 Luminary Micro, Inc, LM3S6918 Datasheet - Page 505

• Manufacturer Part Number: LM3S6918
• Description: Lm3s6918 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

July 26, 2008
a. The Manchester-encoded data pulses, the link pulse and the start-of-idle pulse are tested against the templates and using
Table 21-18. 10BASE-T Transmitter Characteristics (informative)
a. The specifications in this table are included for information only. They are mainly a function of the external transformer
Table 21-19. 10BASE-T Receiver Characteristics
Table 21-20. Isolation Transformers
a. Two simple 1:1 isolation transformers are required at the line interface. Transformers with integrated common-mode
Note:
Parameter Name
Start-of-idle pulse width
Parameter Name
Output return loss
Output impedance balance
Peak common-mode output voltage
Common-mode rejection
Common-mode rejection jitter
Parameter Name
DLL phase acquisition time
Jitter tolerance (pk-pk)
Input squelched threshold
Input unsquelched threshold
Differential input resistance
Bit error ratio
Common-mode rejection
Turns ratio
Open-circuit inductance
Leakage inductance
Inter-winding capacitance
DC resistance
Insertion loss
HIPOT
the procedures found in Clause 14 of IEEE 802.3.
and termination resistors used for measurements.
chokes are recommended for exceeding FCC requirements. This table gives the recommended line transformer
characteristics.
The 100Base-TX amplitude specifications assume a transformer loss of 0.4 dB. For the
transmit line transformer with higher insertion losses, up to 1.2 dB of insertion loss can be
compensated by selecting the appropriate setting in the Transmit Amplitude Selection (TXO)
bits in the MR19 register.
Name
0.9 Ohm (max)
0.40 uH (max)
350 uH (min)
25 pF (max)
1 CT : 1 CT
0.4 dB (typ)
Min
500
275
30
25
Min
-
-
-
Value
1500
-
Nom
10
600
350
Nom
10
20
300
350
29-17log(f/10)
-
-
-10
Max
700
425
Min
Max
15
-
-
-
-
-
@ 10 mV, 10 kHz
-
-
-
-
@ 1 MHz (min)
Preliminary
mVppd
mVppd
a
Condition
0-65 MHz
Unit
Unit
BT
kΩ
+/- 5%
ns
ns
V
Vrms
-
Nom
-
-
-
-
-
Max
100
50
1
-
-
Unit
mV
mV
dB
dB
ns
a
LM3S6918 Microcontroller
505