参数资料
型号: MCF5373LCVM240
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 240 MHz, RISC PROCESSOR, PBGA256
封装: 17 X 17 MM, ROHS COMPLIANT, MAPBGA-256
文件页数: 25/46页
文件大小: 922K
代理商: MCF5373LCVM240
Electrical Characteristics
MCF537x ColdFire Microprocessor Data Sheet, Rev. 4
Freescale Semiconductor
31
5.13
Fast Ethernet AC Timing Specifications
MII signals use TTL signal levels compatible with devices operating at 5.0 V or 3.3 V.
5.13.1
MII Receive Signal Timing
The receiver functions correctly up to a FEC_RXCLK maximum frequency of 25 MHz +1%. The processor clock frequency
must exceed twice the FEC_RXCLK frequency.
Table 18 lists MII receive channel timings.
Figure 18 shows MII receive signal timings listed in Table 18.
Figure 18. MII Receive Signal Timing Diagram
5.13.2
MII Transmit Signal Timing
Table 19 lists MII transmit channel timings.
The transmitter functions correctly up to a FEC_TXCLK maximum frequency of 25 MHz +1%. The processor clock frequency
must exceed twice the FEC_TXCLK frequency.
Figure 19 shows MII transmit signal timings listed in Table 19.
Table 18. MII Receive Signal Timing
Num
Characteristic
Min
Max
Unit
M1
FEC_RXD[3:0], FEC_RXDV, FEC_RXER to FEC_RXCLK setup
5
ns
M2
FEC_RXCLK to FEC_RXD[3:0], FEC_RXDV, FEC_RXER hold
5
ns
M3
FEC_RXCLK pulse width high
35%
65%
FEC_RXCLK period
M4
FEC_RXCLK pulse width low
35%
65%
FEC_RXCLK period
Table 19. MII Transmit Signal Timing
Num
Characteristic
Min
Max
Unit
M5
FEC_TXCLK to FEC_TXD[3:0], FEC_TXEN, FEC_TXER invalid
5
ns
M6
FEC_TXCLK to FEC_TXD[3:0], FEC_TXEN, FEC_TXER valid
25
ns
M7
FEC_TXCLK pulse width high
35%
65%
FEC_TXCLK period
M8
FEC_TXCLK pulse width low
35%
65%
FEC_TXCLK period
M1
M2
FEC_RXCLK (input)
FEC_RXD[3:0] (inputs)
FEC_RXDV
FEC_RXER
M3
M4
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
MCF53721CVM240,
MCF5372LCVM240,
MCF5373LCVM240
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