Ethernet: Enhanced Three-Speed Ethernet (eTSEC)
shows the RMII receive AC timing diagram.
t
RMR
REF_CLK
t
RMRH
RXD[1:0]
CRS_DV
RX_ER
t
RMRDV
t
RMRDX
t
RMRF
Valid Data
t
RMRR
Figure 14. RMII Receive AC Timing Diagram
8.3
Management Interface Electrical Characteristics
The electrical characteristics specified here apply to MII management interface signals MDIO
(management data input/output) and MDC (management data clock).
provides the AC test load for eTSEC.
Output
Z
0
= 50
Ω
LVDD/2
R
L
= 50
Ω
Figure 15. eTSEC AC Test Load
8.3.1
MII Management DC Electrical Characteristics
The MDC and MDIO are defined to operate at a supply voltage of 2.5 V or 3.3 V. The DC electrical
characteristics for MDIO and MDC are provided in
and
Table 30. MII Management DC Electrical Characteristics When Powered at 2.5 V
Parameter
Supply voltage (2.5 V)
Output high voltage
Output low voltage
Input high voltage
Input low voltage
Input high current
Input low current
I
OH
= –1.0 mA
I
OL
= 1.0 mA
—
—
Conditions
—
LV
DD1
= Min
LV
DD1
= Min
LV
DD1
= Min
LV
DD1
= Min
V
IN
= LV
DD1
V
IN
= LV
DD1
Symbol
LV
DD1
V
OH
V
IH
V
IL
I
IH
I
IL
Min
2.37
2.00
GND – 0.3
1.7
–0.3
—
–15
Max
2.63
LV
DD1
+ 0.3
0.40
—
0.70
20
—
Unit
V
V
V
V
V
μA
μA
MPC8377E PowerQUICC
™
II Pro Processor Hardware Specifications, Rev. 2
30
Freescale Semiconductor
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
