參數(shù)資料
型號(hào)： MPC8349ECVVALD
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 667 MHz, MICROPROCESSOR, PBGA672
封裝： 35 X 35 MM, 1.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, TBGA-672
文件頁(yè)數(shù)： 25/88頁(yè)
文件大?。?/td> 1014K
代理商： MPC8349ECVVALD
MPC8349E PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 10
Freescale Semiconductor
31
Ethernet:Three-Speed Ethernet, MII Management
8.3.2
MII Management AC Electrical Specifications
Table 30 provides the MII management AC timing specifications.
Figure 15 shows the MII management AC timing diagram.
Figure 15. MII Management Interface Timing Diagram
Table 30. MII Management AC Timing Specifications
At recommended operating conditions with LVDD is 3.3 V ± 10% or 2.5 V ± 5%.
Parameter/Condition
Symbol1
Min
Typ
Max
Unit
Notes
MDC frequency
fMDC
—2.5
—
MHz
2
MDC period
tMDC
—400
—
ns
MDC clock pulse width high
tMDCH
32
—
ns
MDC to MDIO delay
tMDKHDX
10
—
170
ns
3
MDIO to MDC setup time
tMDDVKH
5—
—
ns
MDIO to MDC hold time
tMDDXKH
0—
—
ns
MDC rise time
tMDCR
—
10
ns
MDC fall time
tMDHF
—
10
ns
Notes:
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, tMDKHDX symbolizes management data
timing (MD) for the time tMDC from clock reference (K) high (H) until data outputs (D) are invalid (X) or data hold time. Also,
tMDDVKH symbolizes management data timing (MD) with respect to the time data input signals (D) reach the valid state (V)
relative to the tMDC clock reference (K) going to the high (H) state or setup time. For rise and fall times, the latter convention
is used with the appropriate letter: R (rise) or F (fall).
2. This parameter is dependent on the csb_clk speed (that is, for a csb_clk of 267 MHz, the maximum frequency is 8.3 MHz
and the minimum frequency is 1.2 MHz; for a csb_clk of 375 MHz, the maximum frequency is 11.7 MHz and the minimum
frequency is 1.7 MHz).
3. This parameter is dependent on the csb_clk speed (that is, for a csb_clk of 267 MHz, the delay is 70 ns and for a csb_clk of
333 MHz, the delay is 58 ns).
MDC
tMDDXKH
tMDC
tMDCH
tMDCR
tMDCF
tMDDVKH
tMDKHDX
MDIO
(Input)
(Output)
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