參數(shù)資料
型號: MCF54450VM180
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 180 MHz, RISC PROCESSOR, BGA256
封裝: 17 X 17 MM, ROHS COMPLIANT, MAPBGA-256
文件頁數(shù): 22/48頁
文件大?。?/td> 942K
代理商: MCF54450VM180
Electrical Characteristics
MCF5445x ColdFire Microprocessor Data Sheet, Rev. 4
Freescale Semiconductor
29
Figure 14. Overshoot and Undershoot Limits
5.10
ULPI Timing Specifications
The ULPI interface is fully compliant with the industry standard UTMI+ Low Pin Interface. Control and data timing
requirements for the ULPI pins are given in Table 15. These timings apply to synchronous mode only. All timings are measured
with respect to the clock as seen at the USB_CLKIN pin on the MCF5445x. The ULPI PHY is the source of the 60MHz clock.
NOTE
The USB controller requires a 60-MHz clock, even if using the on-chip FS/LS transceiver
instead of the ULPI interface. In this case, the 60-MHz clock can be generated by the PLL
or input on the USB_CLKIN pin.
Table 15. ULPI Interface Timing
Num
Characteristic
Min
Nominal
Max
Units
USB_CLKIN operating frequency
60
MHz
USB_CLKIN duty cycle
50
%
U1
USB_CLKIN clock period
16.67
ns
U2
Input Setup (control and data)
5.0
ns
U3
Input Hold (control and data)
1.0
ns
U4
Output Valid (control and data)
9.5
ns
U5
Output Hold (control and data)
1.0
Not to exceed 17%
of PCI Cycle
VDD + 0.9V
VDD + 0.5V
VDD
GND - 1.0V
GND - 0.5V
GND
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