參數(shù)資料
型號(hào)： MPC8315VRAFDA
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 333 MHz, MICROPROCESSOR, PBGA620
封裝： 29 X 29 MM, 2.23 MM HEIGHT, 1 MM PITCH, LEAD FREE, TEPBGAII-620
文件頁(yè)數(shù)： 34/112頁(yè)
文件大?。?/td> 1283K
代理商： MPC8315VRAFDA
MPC8315E PowerQUICC II Pro Processor Hardware Specifications, Rev. 0
28
Freescale Semiconductor
Ethernet: Three-Speed Ethernet, MII Management
Figure 12 shows the MII receive AC timing diagram.
Figure 12. MII Receive AC Timing Diagram RMII AC Timing Specifications
9.2.2
RMII AC Timing Specifications
This section describes the RMII transmit and receive AC timing specifications.
9.2.2.1
RMII Transmit AC Timing Specifications
This section describes the RMII transmit and receive AC timing specifications. Table 27 provides the
RMII transmit AC timing specifications.
Table 27. RMII Transmit AC Timing Specifications
At recommended operating conditions with LVDD of 3.3 V ± 300 mv
Parameter/Condition
Symbol 1
Min
Typ
Max
Unit
REF_CLK clock
tRMX
—20
—
ns
REF_CLK duty cycle
tRMXH/tRMX
35
—
65
%
REF_CLK to RMII data TXD[1:0], TX_EN delay
tRMTKHDX
2
—
10
ns
REF_CLK data clock rise VIL(min) to VIH(max)
tRMXR
1.0
—
4.0
ns
REF_CLK data clock fall VIH(max) to VIL(min)
tRMXF
1.0
—
4.0
ns
Note:
1. The symbols used for timing specifications herein follow the pattern of t(first three 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, tRMTKHDX
symbolizes RMII transmit timing (RMT) for the time tRMX 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 tRMX represents the RMII(RM) reference (X) clock. For rise and fall
times, the latter convention is used with the appropriate letter: R (rise) or F (fall).
RX_CLK
RXD[3:0]
tMRDXKH
tMRX
tMRXH
tMRXR
tMRXF
RX_DV
RX_ER
tMRDVKH
Valid Data
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