Ethernet: Enhanced Three-Speed Ethernet (eTSEC)
The Fast Ethernet Controller (FEC) operates in MII mode only, and complies with the AC and DC
electrical characteristics specified in this chapter for MII. Note that if FEC is used, eTSEC 3 and 4 are only
available in SGMII mode.
8.1.1
eTSEC DC Electrical Characteristics
All MII, GMII, RMII, and TBI drivers and receivers comply with the DC parametric attributes specified
in
Table 22
and
Table 23.
All RGMII, RTBI and FIFO drivers and receivers comply with the DC
parametric attributes specified in
Table 23.
The RGMII and RTBI signals are based on a 2.5-V CMOS
interface voltage as defined by JEDEC EIA/JESD8-5.
Table 22. GMII, MII, RMII, and TBI DC Electrical Characteristics
Parameter
Supply voltage 3.3 V
Output high voltage
(LV
DD
/TV
DD
= Min, IOH = –4.0 mA)
Output low voltage
(LV
DD
/TV
DD
= Min, IOL = 4.0 mA)
Input high voltage
Input low voltage
Input high current
(V
IN
= LV
DD
, V
IN
= TV
DD
)
Input low current
(V
IN
= GND)
Notes:
1
2
Symbol
LV
DD
TV
DD
VOH
VOL
V
IH
V
IL
I
IH
I
IL
Min
3.13
2.40
GND
2.0
–0.3
—
–600
Max
3.47
LV
DD
/TV
DD
+ 0.3
0.50
LV
DD
/TV
DD
+ 0.3
0.90
40
—
Unit
V
V
V
V
V
μA
μA
Notes
1, 2
—
—
—
—
1, 2,3
LV
DD
supports eTSECs 1 and 2.
TV
DD
supports eTSECs 3 and 4 or FEC.
3
The symbol V , in this case, represents the LV and TV symbols referenced in
Table 1.
IN
IN
IN
Table 23. MII, GMII, RMII, RGMII, TBI, RTBI, and FIFO DC Electrical Characteristics
Parameters
Supply voltage 2.5 V
Output high voltage
(LV
DD
/TV
DD
= Min, IOH = –1.0 mA)
Output low voltage
(LV
DD
/TV
DD
= Min, I
OL
= 1.0 mA)
Input high voltage
Input low voltage
Symbol
LV
DD/
TV
DD
V
OH
V
OL
V
IH
V
IL
Min
2.37
2.00
GND – 0.3
1.70
–0.3
Max
2.63
LV
DD
/TV
DD
+ 0.3
0.40
LV
DD
/TV
DD
+ 0.3
0.70
Unit
V
V
V
V
V
Notes
1,2
—
—
—
—
MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4
Freescale Semiconductor
29
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
