K20P81M72SF1 Datasheet, PDF (56/74 Pages) Freescale Semiconductor, Inc – K20 Sub-Family

Peripheral operating requirements and behaviors
Table 38. USB VREG electrical specifications
(continued)
Symbol Description
I_LOADstby
V_Reg33out
Maximum load current — Standby mode
Regulator output voltage — Input supply
(VREGIN) > 3.6 V
• Run mode
• Standby mode
V_Reg33out
C_OUT
ESR
I_LIM
Regulator output voltage — Input supply
(VREGIN) < 3.6 V, pass-through mode
External output capacitor
External output capacitor equivalent series
resistance
Short circuit current
Min.
—
Typ.¹
—
Max.
1
Unit
Notes
mA
3
3.3
3.6
V
2.1
2.8
3.6
V
2.1
—
3.6
V
2
1.76
2.2
8.16
μF
1
—
100
mΩ
—
290
—
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 CAN switching specifications
See General switching specifications.
6.8.5 DSPI switching specifications (limited voltage range)
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
below provide DSPI timing characteristics for classic SPI timing modes. Refer to the
DSPI chapter of the Reference Manual for information on the modified transfer formats
used for communicating with slower peripheral devices.
Table 39. Master mode DSPI timing (limited voltage range)
Num
DS1
DS2
DS3
Operating voltage
Description
Frequency of operation
DSPI_SCK output cycle time
DSPI_SCK output high/low time
DSPI_PCSn valid to DSPI_SCK delay
Min.
Max.
2.7
3.6
—
25
2 x t_BUS
—
(t_SCK/2) − 2 (t_SCK/2) + 2
(t_BUS x 2) −
—
2
Unit
V
MHz
ns
ns
ns
Notes
1
Table continues on the next page...
K20 Sub-Family Data Sheet, Rev. 2, 4/2012.
56
Freescale Semiconductor, Inc.