mcf54455 Freescale Semiconductor, Inc, mcf54455 Datasheet - Page 30

• Manufacturer Part Number: mcf54455
• Description: 32-bit Microprocessor With Usb On-the-go, Ethernet, Pci, Ddr2/ddr Controller And Encryption
• Manufacturer: Freescale Semiconductor, Inc

Electrical Characteristics
5.10
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
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.
30
Num
ULPI Timing Specifications
U1
U2
U3
U4
U5
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.
GND - 0.5V
GND - 1.0V
V
V
USB_CLKIN operating frequency
USB_CLKIN duty cycle
USB_CLKIN clock period
Input Setup (control and data)
Input Hold (control and data)
Output Valid (control and data)
Output Hold (control and data)
DD
DD
+ 0.9V
+ 0.5V
GND
V
DD
MCF5445x ColdFire
Characteristic
Figure 14. Overshoot and Undershoot Limits
Table
Table 15. ULPI Interface Timing
15. These timings apply to synchronous mode only. All timings are measured
®
Not to exceed 17%
Microprocessor Data Sheet, Rev. 0
of PCI Cycle
NOTE
Min
5.0
1.0
1.0
—
—
—
—
Nominal
16.67
60
50
—
—
—
—
Max
9.5
—
—
—
—
—
—
Freescale Semiconductor
Units
MHz
ns
ns
ns
ns
%