M5271EVB Freescale Semiconductor, M5271EVB Datasheet - Page 32

• Manufacturer Part Number: M5271EVB
• Description: BOARD EVAL FOR MCF5270/71
• Manufacturer: Freescale Semiconductor

Specifications of M5271EVB

• Processor To Be Evaluated: MCF5271
• Interface Type: RS-232, Ethernet
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Electrical Characteristics
7.10
MII signals use TTL signal levels compatible with devices operating at either 5.0 V or 3.3 V.
7.10.1
The receiver functions correctly up to a ERXCLK maximum frequency of 25 MHz +1%. The processor
clock frequency must exceed twice the ERXCLK frequency.
Table 18
Figure 16
32
I2C_SDA
I2C_SCL
Num
M1
M2
M3
M4
lists MII receive channel timings.
Fast Ethernet AC Timing Specifications
shows MII receive signal timings listed in
ERXD[3:0] (inputs)
MII Receive Signal Timing (ERXD[3:0], ERXDV, ERXER, and
ERXCLK)
ERXCLK (input)
ERXD[3:0], ERXDV, ERXER to ERXCLK setup
ERXCLK to ERXD[3:0], ERXDV, ERXER hold
ERXCLK pulse width high
ERXCLK pulse width low
I1
ERXER
ERXDV
MCF5271 Integrated Microprocessor Hardware Specification, Rev. 4
I2
Figure 16. MII Receive Signal Timing Diagram
I4
Characteristic
Figure 15. I
Table 18. MII Receive Signal Timing
M1
I6
2
M2
C Input/Output Timings
M3
I7
Table
18.
I8
M4
35%
35%
Min
5
5
I5
65%
65%
Max
—
—
I3
Freescale Semiconductor
ERXCLK period
ERXCLK period
I9
Unit
ns
ns