參數(shù)資料
型號(hào): MPC5200B
廠商: 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述: SDRAM/DDR Memory Controller
中文描述: 內(nèi)存/ DDR存儲(chǔ)器控制器
文件頁(yè)數(shù): 43/78頁(yè)
文件大小: 629K
代理商: MPC5200B
Electrical and Thermal Characteristics
MPC5200B Data Sheet, Rev. 1
Freescale Semiconductor
43
Figure 29. Ethernet Timing Diagram—MII Async
Figure 30. Ethernet Timing Diagram—MII Serial Management
Table 34. MII Serial Management Channel Signal Timing
Sym
Description
Min
Max
Unit
SpecID
t
10
MDC falling edge to MDIO output delay
0
25
ns
A9.10
t
11
MDIO (input) to MDC rising edge setup
10
ns
A9.11
t
12
MDIO (input) to MDC rising edge hold
10
ns
A9.12
t
13
MDC pulse width high
(1)
NOTES:
1
MDC is generated by MPC5200B with a duty cycle of 50% except when MII_SPEED in the FEC MII_SPEED
control register is changed during operation. See the MPC5200B User Manual [1].
2
The MDC period must be set to a value of less than or equal to 2.5 MHz (to be compliant with the IEEE MII
characteristic) by programming the FEC MII_SPEED control register. See the MPC5200B User Manual [1].
160
ns
A9.13
t
14
MDC pulse width low
(1)
160
ns
A9.14
t
15
MDC period
(2)
400
ns
A9.15
t
9
CRS, COL
t
14
t
13
t
12
MDC (Output)
MDIO (Input)
MDIO (Output)
t
11
t
10
t
15
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