参数资料
型号: MPC8309VMADDCA
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 266 MHz, RISC PROCESSOR, PBGA489
封装: 19 X 19 MM, 1.61 MM HEIGHT, 0.80 MM PITCH, LEAD FREE, PLASTIC, MAPBGA-489
文件页数: 20/81页
文件大小: 484K
代理商: MPC8309VMADDCA
MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 1
Freescale Semiconductor
27
Ethernet and MII Management
The following figure shows the RMII receive AC timing diagram.
Figure 16. RMII Receive AC Timing Diagram
8.3
Ethernet Management Interface Electrical Characteristics
The electrical characteristics specified here apply to MII management interface signals MDIO
(management data input/output) and MDC (management data clock). The electrical characteristics for
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 the following table.
8.3.2
MII Management AC Electrical Specifications
The following table provides the MII management AC timing specifications.
Table 24. MII Management DC Electrical Characteristics When Powered at 3.3 V
Parameter
Symbol
Conditions
Min
Max
Unit
Supply voltage (3.3 V)
OVDD
—3
3.6
V
Output high voltage
VOH
IOH = –1.0 mA
OVDD =Min
2.40
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
A
Table 25. MII Management AC Timing Specifications
At recommended operating conditions with OVDD is 3.3 V ± 300mV.
Parameter/Condition
Symbol1
Min
Typical
Max
Unit
Note
MDC frequency
fMDC
—2.5
MHz
MDC period
tMDC
—400
ns
MDC clock pulse width high
tMDCH
32
ns
REF_CLK
RXD[1:0]
tRMRDXKH
tRMX
tRMXH
tRMXR
tRMXF
CRS_DV
RX_ER
tRMRDVKH
Valid Data
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