參數(shù)資料
型號： MPC8321EVRADDC
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 266 MHz, RISC PROCESSOR, PBGA516
封裝： 27 X 27 MM, 2.25 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, PBGA-516
文件頁數(shù)： 16/80頁
文件大?。?/td> 1122K
代理商： MPC8321EVRADDC
MPC8323E PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 2
Freescale Semiconductor
23
Ethernet and MII Management
8.3.1
MII Management DC Electrical Characteristics
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 27.
8.3.2
MII Management AC Electrical Specifications
Table 28 provides the MII management AC timing specifications.
Table 27. MII Management DC Electrical Characteristics When Powered at 3.3 V
Parameter
Symbol
Conditions
Min
Max
Unit
Supply voltage (3.3 V)
OVDD
—
2.97
3.63
V
Output high voltage
VOH
IOH = –1.0 mA
OVDD = Min
2.10
OVDD + 0.3
V
Output low voltage
VOL
IOL = 1.0 mA
OVDD = Min
GND
0.50
V
Input high voltage
VIH
—2.00
—
V
Input low voltage
VIL
——
0.80
V
Input current
IIN
0 V
≤ VIN ≤ OVDD
—±5
μA
Table 28. MII Management AC Timing Specifications
At recommended operating conditions with OVDD is 3.3 V ± 10%.
Parameter/Condition
Symbol1
Min
Typical
Max
Unit
Notes
MDC frequency
fMDC
—2.5
—
MHz
—
MDC period
tMDC
—400
—
ns
—
MDC clock pulse width high
tMDCH
32
—
ns
—
MDC to MDIO delay
tMDKHDX
10
—
70
ns
—
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
—
Note:
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).
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