K20P144M100SF2 Datasheet, PDF (51/67 Pages) Freescale Semiconductor, Inc – K20 Sub-Family Data Sheet

Peripheral operating requirements and behaviors
Table 35. USB voltage regulator electrical specifications (continued)
Symbol
C_OUT
ESR
I_LIM
Description
External output capacitor
External output capacitor equivalent series re‐
sistance
Current limitation threshold
Min.
1.76
1
185
Typ.
2.2
—
290
Max.
8.16
100
395
Unit
Notes
μF
mΩ
mA
1. Operating in pass-through mode: regulator output voltage equal to the input voltage minus a drop proportional to I_Load.
6.8.4 DSPI Switching Specifications for Low-speed Operation
y ^{The DMA Serial Peripheral Interface (DSPI) provides a synchronous serial bus with}
master and slave operations. Many of the transfer attributes are programmable. The tables
r _{below provides DSPI timing characteristics for classic SPI timing modes. Refer to the}
DSPI chapter of the Reference Manual for information on the modified transfer formats
a _{used for communicating with slower peripheral devices.}
in ^{Table 36. Master Mode DSPI Timing (Low-speed mode)}
Num
DS1
DS2
DS3
DS4
DS5
DS6
DS7
Operating voltage
Description
Frequency of operation
lim ^{DSPI_SCK output cycle time}
DSPI_SCK output high/low time
DSPI_PCSn to DSPI_SCK output valid
e DSPI_SCK to DSPI_PCSn output hold
r ^{DSPI_SCK to DSPI_SOUT valid}
DSPI_SCK to DSPI_SOUT invalid
P ^{DSPI_SIN to DSPI_SCK input setup}
Min.
1.71
—
4 x t_BCLK
(t_SCK/2) - 4
(t_SCK/2) - 4
(t_SCK/2) - 4
—
-2
15
Max.
3.6
12.5
—
(t_SCK/2) + 4
—
—
10
—
—
Unit
V
MHz
ns
ns
ns
ns
ns
ns
ns
Notes
1
DS8
DSPI_SCK to DSPI_SIN input hold
0
—
ns
1. The DSPI module can operate across the entire operating voltage for the processor, but to run across the full voltage
range the maximum frequency of operation is reduced.
K20 Sub-Family Data Sheet Data Sheet, Rev. 1, 11/2010.
Freescale Semiconductor, Inc.
Preliminary
51