参数资料
型号: MPC8544ECVTAQJB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 1000 MHz, RISC PROCESSOR, PBGA783
封装: 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-783
文件页数: 60/120页
文件大小: 1321K
代理商: MPC8544ECVTAQJB
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 2
44
Freescale Semiconductor
Ethernet Management Interface Electrical Characteristics
Figure 26 shows the MII management AC timing diagram.
Figure 26. MII Management Interface Timing Diagram
MDC fall time
tMDHF
10
ns
Notes:
1. The symbols used 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 platform clock frequency (MIIMCFG [MgmtClk] field determines the clock frequency of
the MgmtClk Clock EC_MDC).
3. This parameter is dependent on the platform clock frequency. The delay is equal to 16 platform clock periods ±3 ns. For
example, with a platform clock of 333 MHz, the min/max delay is 48 ns ± 3 ns. Similarly, if the platform clock is 400 MHz, the
min/max delay is 40 ns ± 3 ns).
4. tplb_clk is the platform (CCB) clock.
Table 41. MII Management AC Timing Specifications (continued)
At recommended operating conditions with OVDD is 3.3 V ± 5%.
Parameter/Condition
Symbol1
Min
Typ
Max
Unit
Notes
MDC
tMDDXKH
tMDC
tMDCH
tMDCR
tMDCF
tMDDVKH
tMDKHDX
MDIO
(Input)
(Output)
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