mpc8309 Freescale Semiconductor, Inc, mpc8309 Datasheet - Page 28

• Manufacturer Part Number: mpc8309
• Description: Powerquicc Ii Pro Integrated Communications Processor Family Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

Ethernet and MII Management
Figure 16
8.3
The electrical characteristics specified here apply to MII management interface signals MDIO
(management data input/output) and MDC (management data clock). The electrical characteristics for
MII, and RMII are specified in
Characteristics.”
8.3.1
MDC and MDIO are defined to operate at a supply voltage of 3.3 V. The DC electrical characteristics for
MDIO and MDC are provided in
8.3.2
Table 25
28
At recommended operating conditions with OV
Supply voltage (3.3 V)
Output high voltage
Output low voltage
Input high voltage
Input low voltage
Input current
MDC frequency
MDC period
MDC clock pulse width high
MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0
provides the MII management AC timing specifications.
Ethernet Management Interface Electrical Characteristics
shows the RMII receive AC timing diagram.
Parameter/Condition
Parameter
MII Management DC Electrical Characteristics
MII Management AC Electrical Specifications
Table 24. MII Management DC Electrical Characteristics When Powered at 3.3 V
REF_CLK
RXD[1:0]
CRS_DV
RX_ER
Table 25. MII Management AC Timing Specifications
Figure 16. RMII Receive AC Timing Diagram
Section 8.1, “Ethernet Controller (10/100 Mbps)—MII/RMII Electrical
t
RMRDVKH
t
Symbol
RMXH
Table
OV
V
V
DD
V
V
I
OH
IN
OL
IH
IL
DD
is 3.3 V ± 300mV.
t
RMX
24.
Symbol
t
I
f
t
MDCH
OH
I
MDC
MDC
OL
= –1.0 mA
= 1.0 mA
Valid Data
1
0 V  V
Conditions
t
RMXF
IN
—
—
—
Min
32
—
—
 OV
OV
OV
DD
DD
DD
= Min
= Min
t
RMRDXKH
t
RMXR
Typical
400
2.5
—
GND
2.40
2.00
Min
—
—
3
Max
—
—
—
Freescale Semiconductor
OV
DD
Max
0.50
0.80
3.6
±5
—
MHz
Unit
+ 0.3
ns
ns
Notes
Unit
A
—
—
—
V
V
V
V
V