MCF51JU128VHS FREESCALE [Freescale Semiconductor, Inc], MCF51JU128VHS Datasheet - Page 46

• Manufacturer Part Number: MCF51JU128VHS
• Description: MCF51JU128
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Communication interfaces
1. Operating in pass-through mode: regulator output voltage equal to the input voltage minus a drop proportional to I
6.8.4 SPI switching specifications
The Serial Peripheral Interface (SPI) provides a synchronous serial bus with master and
slave operations. Many of the transfer attributes are programmable. The following tables
provide timing characteristics for classic SPI timing modes. See the SPI chapter of the
chip's Reference Manual for information about the modified transfer formats used for
communicating with slower peripheral devices.
All timing is shown with respect to 20% V
input signal transitions of 3 ns and a 50 pF maximum load on all SPI pins. All timing
assumes slew rate control is disabled and high drive strength is enabled for SPI output
pins.
46
V
V
Symbol
Reg33out
Reg33out
C
Num.
ESR
I
LIM
OUT
1
2
3
4
5
Regulator output voltage — Input supply
(VREGIN) > 3.6 V
Regulator output voltage — Input supply
(VREGIN) < 3.6 V, pass-through mode
External output capacitor
External output capacitor equivalent series
resistance
Short circuit current
Description
t
Symbol
WSPSCK
t
SPSCK
t
• Run mode
• Standby mode
t
Lead
f
Lag
op
Table 33. USB VREG electrical specifications
MCF51JU128 Advance Information Data Sheet, Rev. 1, 08/2011.
Frequency of operation
SPSCK period
Enable lead time
Enable lag time
Clock (SPSCK) high or low time
Description
(continued)
Table 34. SPI master mode timing
Table continues on the next page...
Preliminary
DD
and 70% V
TBD
TBD
TBD
1.76
Min.
3
1
f
BUS
t
2 x t
BUS
Typ.
290
Min.
3.3
2.8
2.2
DD
1/2
1/2
—
—
/2048
BUS
- 30
, unless noted, as well as
2048 x
1024 x
f
Max.
TBD
Max.
BUS
8.16
t
t
100
3.6
3.6
3.6
BUS
BUS
—
—
/2
Freescale Semiconductor, Inc.
t
t
SPSCK
SPSCK
Unit
Unit
mΩ
mA
μF
Hz
ns
ns
V
V
V
as defined
in
f
Comment
bus clock
BUS
t
BUS
Load
Notes
Table
f
BUS
—
—
—
1
is the
= 1/
.
9.