参数资料
型号: MPC8540VTAQFC
厂商: Freescale Semiconductor
文件页数: 34/104页
文件大小: 0K
描述: MPU POWERQUICC III 783FCPBGA
标准包装: 36
系列: MPC85xx
处理器类型: 32-位 MPC85xx PowerQUICC III
速度: 1.0GHz
电压: 1.3V
安装类型: 表面贴装
封装/外壳: 784-BBGA,FCBGA
供应商设备封装: 783-FCPBGA(29x29)
包装: 托盘
MPC8540 Integrated Processor Hardware Specifications, Rev. 4.1
Freescale Semiconductor
35
Ethernet: Three-Speed,10/100, MII Management
8.4.2 MII Management AC Electrical Specifications
Table 34 provides the MII management AC timing specifications.
Figure 17 shows the MII management AC timing diagram.
Figure 17. MII Management Interface Timing Diagram
Table 34. MII Management AC Timing Specifications
At recommended operating conditions with OVDD is 3.3 V ± 5%.
Parameter/Condition
Symbol 1
Min
Typ
Max
Unit
Notes
MDC frequency
fMDC
0.893
10.4
MHz
2, 4
MDC period
tMDC
96
1120
ns
MDC clock pulse width high
tMDCH
32
ns
MDC to MDIO valid
tMDKHDV
2*[1/(fccb_clk/8)]
ns
3
MDC to MDIO delay
tMDKHDX
10
2*[1/(fccb_clk/8)]
ns
3
MDIO to MDC setup time
tMDDVKH
5—
ns
MDIO to MDC hold time
tMDDXKH
0—
ns
MDC rise time
tMDCR
10
ns
4
MDC fall time
tMDHF
10
ns
4
Notes:
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, 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 CCB clock speed (that is, for a CCB clock of 267 MHz, the maximum frequency is
8.3 MHz and the minimum frequency is 1.2 MHz; for a CCB clock of 333 MHz, the maximum frequency is 10.4 MHz
and the minimum frequency is 1.5 MHz).
3.This parameter is dependent on the CCB clock speed (that is, for a CCB clock of 267 MHz, the delay is 60 ns and for a
CCB clock of 333 MHz, the delay is 48 ns).
4.Guaranteed by design.
MDC
tMDDXKH
tMDC
tMDCH
tMDCR
tMDCF
tMDDVKH
tMDKHDX
MDIO
(Input)
(Output)
tMDKHDV
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