mpc8568e Freescale Semiconductor, Inc, mpc8568e Datasheet - Page 26

• Manufacturer Part Number: mpc8568e
• Description: Mpc8568e Powerquicc Iii Processor
• Manufacturer: Freescale Semiconductor, Inc

Ethernet Interface and MII Management
7.2
Table 22
8
This section provides the AC and DC electrical characteristics for eTSEC, MII management and Ethernet
interface inside QUICC Engine. Please note that eTSEC and QE Ethernet have the same DC/AC
characteristics.
8.1
The electrical characteristics specified here apply to all gigabit media independent interface (GMII), media
independent interface (MII), ten-bit interface (TBI), reduced gigabit media independent interface
(RGMII), reduced ten-bit interface (RTBI), and reduced media independent interface (RMII) signals
except management data input/output (MDIO) and management data clock (MDC). The RGMII and RTBI
interfaces are defined for 2.5 V, while the GMII and TBI interfaces can be operated at 3.3 or 2.5 V. Whether
the GMII, MII, or TBI interface is operated at 3.3 or 2.5 V, the timing is compatible with the IEEE 802.3
standard. The RGMII and RTBI interfaces follow the Reduced Gigabit Media-Independent Interface
(RGMII) Specification Version 1.3 (12/10/2000). The RMII interface follows the RMII Consortium RMII
26
Minimum baud rate
Maximum baud rate
Oversample rate
Notes:
1. Guaranteed by design
2. CCB clock refers to the platform clock.
3. Actual attainable baud rate will be limited by the latency of interrupt processing.
4. The middle of a start bit is detected as the 8
sampled each 16
Ethernet Interface and MII Management
provides the AC timing parameters for the DUART interface.
DUART AC Electrical Specifications
GMII/MII/TBI/RGMII/RTBI/RMII Electrical Characteristics
Input current
(V
High-level output voltage
(OV
Low-level output voltage
(OV
Note:
1. Note that the symbol V
MPC8568E/MPC8567E PowerQUICC III™ Integrated Processor Hardware Specifications, Rev. 0
IN
DD
DD
1
= 0 V or V
= min, I
= min, I
th
sample.
Parameter
OH
OL
Table 21. DUART DC Electrical Characteristics (continued)
IN
Parameter
= 100 μA)
= –100 μA)
= V
DD)
IN
Table 22. DUART AC Timing Specifications
, in this case, represents the OV
th
sampled 0 after the 1-to-0 transition of the start bit. Subsequent bit values are
Symbol
V
V
I
OH
IN
OL
CCB clock/1,048,576
CCB clock/16
IN
OV
Value
symbol referenced in
16
DD
Min
—
—
– 0.2
Max
±10
0.2
—
Table 2
baud
baud
Unit
—
Freescale Semiconductor
and
Unit
μA
Table
V
V
3.
Notes
1,2
1,3
1,4