mcf54455 Freescale Semiconductor, Inc, mcf54455 Datasheet - Page 7

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

3.3.1
If EV
to the EV
must power up. The rise times on the power supplies should be slower than 50 V/millisecond to avoid turning on the internal
ESD protection clamp diodes.
3.3.2
If IV
There is no limit on how long after IV
requirements for the fall times of the power supplies.
4
4.1
The following table lists all the MCF5445x pins grouped by function. The Dir column is the direction for the primary function
of the pin only. Refer to
of the MCF5445x signals, consult the MCF54455 Reference Manual (MCF54455RM).
Freescale Semiconductor
DD
DD
/PV
/SDV
DD
DD
Pin Assignments and Reset States
Signal Multiplexing
/SDV
DD
Power-Up Sequence
Power-Down Sequence
are powered down first, sense circuits in the I/O pads cause all output drivers to be in a high impedance state.
are powered up with the IV
DD
In this table and throughout this document, a single signal within a group is designated
without square brackets (i.e., FB_AD23), while designations for multiple signals within a
group use brackets (i.e., FB_AD[23:21]) and is meant to include all signals within the two
bracketed numbers when these numbers are separated by a colon.
The primary functionality of a pin is not necessarily its default functionality. Most pins that
are muxed with GPIO default to their GPIO functionality. See
exceptions.
to be in a high impedance state. There is no limit on how long after EV
Section 4, “Pin Assignments and Reset
FB_BE/BWE[3:0]
FB_AD[31:0]
FB_CS[3:1]
FB_R/W
FB_OE
FB_TS
FB_TA
MCF5445x ColdFire
Table 3. Special-Case Default Signal Functionality
Pin
DD
and PV
DD
FB_AD[31:0] except when serial boot selects 0-bit
at 0 V, the sense circuits in the I/O pads cause all pad output drivers connected
DD
256 MAPBGA
power down before EV
®
Microprocessor Data Sheet, Rev. 0
NOTE
NOTE
FB_BE/BWE[3:0]
States,”
boot port size.
FB_CS[3:1]
FB_R/W
FB_OE
FB_TS
FB_TA
for package diagrams. For a more detailed discussion
DD
360 TEPBGA
or SDV
Table 3
DD
for a list of the
Pin Assignments and Reset States
DD
must power down. There are no
/SDV
DD
powers up before IV
DD
7