參數(shù)資料
型號(hào): MPC885ZP80
廠商: 飛思卡爾半導(dǎo)體(中國(guó))有限公司
元件分類: 圓形連接器
英文描述: Circular Connector; Body Material:Aluminum; Series:PT07; Number of Contacts:12; Connector Shell Size:14; Connecting Termination:Solder; Circular Shell Style:Jam Nut Receptacle; Circular Contact Gender:Socket
中文描述: 硬件規(guī)格
文件頁(yè)數(shù): 71/92頁(yè)
文件大?。?/td> 1499K
代理商: MPC885ZP80
MPC885/MPC880 Hardware Specifications, Rev. 3
71
Freescale Semiconductor
USB Electrical Characteristics
Figure 71
shows signal timings during UTOPIA transmit operations.
Figure 71. UTOPIA Transmit Timing
14 USB Electrical Characteristics
This section provides the AC timings for the USB interface.
14.1 USB Interface AC Timing Specifications
The USB Port uses the transmit clock on SCC1.
Table 33
lists the USB interface timings.
15 FEC Electrical Characteristics
This section provides the AC electrical specifications for the fast Ethernet controller (FEC). Note that the timing
specifications for the MII signals are independent of system clock frequency (part speed designation). Also, MII
signals use TTL signal levels compatible with devices operating at either 5.0 V or 3.3 V.
Table 33. USB Interface AC Timing Specifications
Name
Characteristic
All Frequencies
Unit
Min
Max
US1
USBCLK frequency of operation
1
Low speed
Full speed
1
USBCLK accuracy should be ±500 ppm or better. USBCLK may be stopped to conserve power.
6
48
MHz
MHz
US4
USBCLK duty cycle (measured at 1.5 V)
45
55
%
UtpClk
UTPB
SOC
TxEnb
TxClav
PHSELn
High-Z at MPHY
High-Z at Multi-PHYP
1
U1
5
5
2
3
4
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