mcf54455 Freescale Semiconductor, Inc, mcf54455 Datasheet - Page 39

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

5.17
The Serial Boot Facility (SBF) provides a means to read configuration information and system boot code from a broad array of
SPI-compatible EEPROMs, flashes, FRAMs, nVSRAMs, etc.
Freescale Semiconductor
1
Name
At reset, the SBF_CK cycle time is t
that is used to set the SBF_CK cycle time for the duration of the serial boot process.
SB1
SB2
SB3
SB4
SB5
SB6
SB7
SB8
SBF Timing Specifications
SBF_CK Cycle Time
SBF_CK High/Low Time
SBF_CS to SBF_CK delay
SBF_CK to SBF_CS delay
SBF_CK to SBF_DO valid
SBF_CK to SBF_DO invalid
SBF_DI to SBF_SCK input setup
SBF_CK to SBF_DI input hold
(DCTARn[CPOL] = 0)
(DCTARn[CPOL] = 1)
DSPI_SOUT
DSPI_SCK
DSPI_SCK
DSPI_SIN
DSPI_SS
Characteristic
MCF5445x ColdFire
Figure 24. DSPI Classic SPI Timing — Slave Mode
Table 27. SBF AC Timing Specifications
REF
DS13
× 67. The first byte of data read from the serial memory contains a divider value
DS11
First Data
First Data
®
Microprocessor Data Sheet, Rev. 0
DS12
DS2
Symbol
t
SBFCK
Table 27
DS2
—
—
—
—
—
—
—
DS10
Data
Data
provides the AC timing specifications for the SBF.
t
t
SBFCK
SBFCK
30%
Min
40
10
-5
5
0
Last Data
Last Data
DS1
- 2.0
- 2.0
DS9
Max
—
—
—
—
—
—
—
—
Electrical Characteristics
DS14
t
SBFCK
Unit
ns
ns
ns
ns
ns
ns
ns
Notes
1
39