Freescale Semiconductor MCF54455 Reference Manual page 349

Pin Multiplexing and Control
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
Table 16-1
FB_BE/BWE[3:0]
Signal Name GPIO
RESET —
RSTOUT —
EXTAL/PCI_CLK —
XTAL —
BOOTMOD[1:0] —
16-4
for a list of the exceptions.
Table 16-1. Special-Case Default Signal Functionality
Pin 256 MAPBGA
FB_AD[31:0] FB_AD[31:0] except when serial boot selects 0-bit
FB_CS[3:1]
FB_OE
FB_R/W
FB_TA
FB_TS
PCI_GNT[3:0] GPIO
PCI_REQ[3:0] GPIO
IRQ1 GPIO
ATA_RESET GPIO
Table 16-2. MCF5445x Signal Information and Muxing
Alternate 1
—
—
—
—
Mode Selection
—
NOTE
360 TEPBGA
boot port size.
FB_BE/BWE[3:0]
FB_CS[3:1]
FB_OE
FB_R/W
FB_TA
FB_TS
PCI_GNT[3:0]
PCI_REQ[3:0]
PCI_INTA and
configured as an agent.
ATA reset
Alternate 2
Reset
— U I
— — O
Clock
— — I
3
— U O
— — I
FlexBus
MCF54452
MCF54450 MCF54453
MCF54451 MCF54454
256 MAPBGA MCF54455
360 TEPBGA
EVDD L4 Y18
EVDD M15 B17
EVDD M16 A16
EVDD L16 A17
EVDD M5, M7 AB17, AB21
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