K20P144M120SF3 Datasheet, PDF (60/80 Pages) Freescale Semiconductor, Inc – K20 Sub-Family Data Sheet

Peripheral operating requirements and behaviors
Table 39. USB VREG electrical specifications
(continued)
Symbol Description
C_OUT
ESR
External output capacitor
External output capacitor equivalent series
resistance
I_LIM
Short circuit current
Min.
1.76
1
—
Typ.¹
2.2
—
290
Max.
8.16
100
—
Unit
Notes
μF
mΩ
mA
1. Typical values assume VREGIN = 5.0 V, Temp = 25 °C unless otherwise stated.
2. Operating in pass-through mode: regulator output voltage equal to the input voltage minus a drop proportional to I_Load.
6.8.4 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 the
following table. These timings apply to synchronous mode only. All timings are
measured with respect to the clock as seen at the USB_CLKIN pin.
Table 40. ULPI timing specifications
Num
U1
U2
U3
U4
U5
Description
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)
Min.
—
—
—
5
1
—
1
Typ.
60
50
16.67
—
—
—
—
Max.
—
—
—
—
—
9.5
—
Unit
MHz
%
ns
ns
ns
ns
ns
K20 Sub-Family Data Sheet Data Sheet, Rev. 3, 2/2012.
60
Preliminary
Freescale Semiconductor, Inc.