參數(shù)資料
型號(hào): MPC8568E-MDS-PB
廠商: Freescale Semiconductor
文件頁數(shù): 67/139頁
文件大小: 0K
描述: MOD DEV SYSTEM POWERQUICC III
標(biāo)準(zhǔn)包裝: 1
系列: PowerQUICC III™
類型: MPU
適用于相關(guān)產(chǎn)品: MPC8568E
所含物品:
MPC8568E/MPC8567E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 1
Freescale Semiconductor
33
Ethernet Interface and MII Management
8.2.3.1
MII Transmit AC Timing Specifications
Table 29 provides the MII transmit AC timing specifications.
Figure 12 shows the MII transmit AC timing diagram.
Figure 12. MII Transmit AC Timing Diagram
8.2.3.2
MII Receive AC Timing Specifications
Table 30 provides the MII receive AC timing specifications.
Table 29. MII Transmit AC Timing Specifications
At recommended operating conditions with L/TVDD of 3.3 V ± 5%.
Parameter/Condition
Symbol 1
Min
Typ
Max
Unit
TX_CLK clock period 10 Mbps
tMTX
2
400
ns
TX_CLK clock period 100 Mbps
tMTX
—40
ns
TX_CLK duty cycle
tMTXH/tMTX
35
65
%
TX_CLK to MII data TXD[3:0], TX_ER, TX_EN delay
tMTKHDX
1
5
15
ns
TX_CLK data clock rise (20%-80%)
tMTXR
2
1.0
4.0
ns
TX_CLK data clock fall (80%-20%)
tMTXF
2
1.0
4.0
ns
Note:
1. The symbols used for timing specifications herein follow the pattern of t(first two letters of functional block)(signal)(state) (reference)(state)
for inputs and t(first two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tMTKHDX symbolizes MII
transmit timing (MT) for the time tMTX clock reference (K) going high (H) until data outputs (D) are invalid (X). Note that, in
general, the clock reference symbol representation is based on two to three letters representing the clock of a particular
functional. For example, the subscript of tMTX represents the MII(M) transmit (TX) clock. For rise and fall times, the latter
convention is used with the appropriate letter: R (rise) or F (fall).
2. Guaranteed by design.
Table 30. MII Receive AC Timing Specifications
At recommended operating conditions with L/TVDD of 3.3 V ± 5%.
Parameter/Condition
Symbol 1
Min
Typ
Max
Unit
RX_CLK clock period 10 Mbps
tMRX
2
—400
ns
RX_CLK clock period 100 Mbps
tMRX
—40
ns
RX_CLK duty cycle
tMRXH/tMRX
35
65
%
TX_CLK
TXD[3:0]
tMTKHDX
tMTX
tMTXH
tMTXR
tMTXF
TX_EN
TX_ER
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