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MPC885CZP133 Arkusz danych(PDF) 71 Page - Freescale Semiconductor, Inc

Numer części MPC885CZP133
Szczegółowy opis  Hardware Specifications
PDF  92 Pages
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Producent  FREESCALE [Freescale Semiconductor, Inc]
Strona internetowa  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MPC885CZP133 Arkusz danych(HTML) 71 Page - Freescale Semiconductor, Inc

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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
TxEnb
1
2
SOC
5
TxClav
PHSELn
3
4
5
High-Z at MPHY
High-Z at Multi-PHYP
U1
U1
U2
U2
U2
U3
U4



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