參數資料
型號： MC8641DHX1250NB
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： MICROPROCESSOR, CBGA1023
封裝： 33 X 33 MM, ROHS COMPLIANT, CERAMIC, BGA-1023
文件頁數： 79/140頁
文件大?。?/td> 1484K
代理商： MC8641DHX1250NB
MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 0
Freescale Semiconductor
43
Ethernet Management Interface Electrical Characteristics
9.1
MII Management DC Electrical Characteristics
The MDC and MDIO are defined to operate at a supply voltage of 3.3 V. The DC electrical characteristics
for MDIO and MDC are provided in Table 38.
9.2
MII Management AC Electrical Specifications
Table 39 provides the MII management AC timing specifications.
Table 38. MII Management DC Electrical Characteristics
Parameter
Symbol
Min
Max
Unit
Supply voltage (3.3 V)
OVDD
3.135
3.465
V
Output high voltage
(OVDD = Min, IOH = –1.0 mA)
VOH
2.10
—
V
Output low voltage
(OVDD =Min, IOL = 1.0 mA)
VOL
—0.50
V
Input high voltage
VIH
1.70
—
V
Input low voltage
VIL
—0.90
V
Input high current
(OVDD = Max, VIN
1 = 2.1 V)
IIH
—40
μA
Input low current
(OVDD = Max, VIN = 0.5 V)
IIL
–600
—
μA
Note:
1. Note that the symbol VIN, in this case, represents the OVIN symbol referenced in Table 1 and Table 2.
Table 39. 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
2.5
—
9.3
MHz
2, 4
MDC period
tMDC
80
—
400
ns
MDC clock pulse width high
tMDCH
32
—
ns
MDC to MDIO valid
tMDKHDV
16*tMPXCLK
ns
5
MDC to MDIO delay
tMDKHDX
10
—
16*tMPXCLK
ns
3, 5
MDIO to MDC setup time
tMDDVKH
5—
—
ns
MDIO to MDC hold time
tMDDXKH
0—
—
ns
MDC rise time
tMDCR
—
10
ns
4
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