M5271EVB Freescale Semiconductor, M5271EVB Datasheet - Page 33

• 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

7.10.2
Table 19
The transmitter functions correctly up to a ETXCLK maximum frequency of 25 MHz +1%. The processor
clock frequency must exceed twice the ETXCLK frequency.
Figure 17
7.10.3
Table 20
Figure 18
Freescale Semiconductor
Num
Num
M5
M6
M7
M8
M9
lists MII transmit channel timings.
lists MII asynchronous inputs signal timing.
ETXD[3:0] (outputs)
shows MII transmit signal timings listed in
shows MII asynchronous input timings listed in
MII Transmit Signal Timing (ETXD[3:0], ETXEN, ETXER, ETXCLK)
MII Async Inputs Signal Timing (ECRS and ECOL)
ECRS, ECOL minimum pulse width
ETXCLK to ETXD[3:0], ETXEN, ETXER invalid
ETXCLK to ETXD[3:0], ETXEN, ETXER valid
ETXCLK pulse width high
ETXCLK pulse width low
ETXCLK (input)
ETXEN
ETXER
ECRS, ECOL
MCF5271 Integrated Microprocessor Hardware Specification, Rev. 4
Figure 17. MII Transmit Signal Timing Diagram
Figure 18. MII Async Inputs Timing Diagram
Characteristic
Characteristic
Table 20. MII Async Inputs Signal Timing
Table 19. MII Transmit Signal Timing
M5
M6
M7
Table
M9
Table
19.
20.
M8
35%
35%
Min
Min
1.5
—
5
Max
65%
65%
Max
25
—
—
Electrical Characteristics
ETXCLK period
ETXCLK period
ETXCLK period
Unit
Unit
ns
ns
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