参数资料
型号: MPC8349ECVVAJD
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 533 MHz, MICROPROCESSOR, PBGA672
封装: 35 X 35 MM, 1.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, TBGA-672
文件页数: 17/88页
文件大小: 1014K
代理商: MPC8349ECVVAJD
MPC8349E PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 10
24
Freescale Semiconductor
Ethernet: Three-Speed Ethernet, MII Management
Figure 8 shows the GMII receive AC timing diagram.
G
Figure 8. GMII Receive AC Timing Diagram
8.2.2
MII AC Timing Specifications
This section describes the MII transmit and receive AC timing specifications.
8.2.2.1
MII Transmit AC Timing Specifications
Table 23 provides the MII transmit AC timing specifications.
Table 23. MII Transmit AC Timing Specifications
At recommended operating conditions with LVDD/OVDD of 3.3 V ± 10%.
Parameter/Condition
Symbol1
Min
Typ
Max
Unit
TX_CLK clock period 10 Mbps
tMTX
—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 VIL(min) to VIH(max)
tMTXR
1.0
4.0
ns
TX_CLK data clock fall VIH(max) to VIL(min)
tMTXF
1.0
4.0
ns
Note:
1. The symbols for timing specifications 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). In general, the clock reference
symbol is based on two to three letters representing the clock of a particular function. 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).
RX_CLK
RXD[7:0]
tGRDXKH
tGRX
tGRXH
tGRXR
tGRXF
tGRDVKH
RX_DV
RX_ER
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