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listing of signals that do not default to a GPIO function.
Table 14-4. Pin Reset States at Reset (Single-Chip Mode)
DSCLK/TRST
14.1.2 External Boot Mode
When booting from external memory, the address bus, data bus, and bus control signals will
default to their bus functionalities as shown in Table 14-5. As in single-chip mode, the
signals listed in Table 14-4 will operate as described above. All other signals will default to
GPIO inputs.
Table 14-5. Default Signal Functions After System
A[23:0]
D[31:0]
BS[3:0]
OE
TA
TEA
R/W
SIZ[1:0]
MOTOROLA
Signal
Clock and Reset Signals
RSTI
RSTO
EXTAL
XTAL
CLKOUT
Debug Support Signals
JTAG_EN
BKPT/TMS
DSI/TDI
DSO/TDO
TCLK
DDATA[3:0]
PST[3:0]
Reset (External Boot Mode)
Signal
Chapter 14. Signal Descriptions
Reset
—
Low
—
XTAL
CLKOUT
—
—
—
—
High
—
DDATA{3:0]
PST[3:0]
Reset
A[23:0]
—
High
High
—
—
High
High
Overview
I/O
I
O
I
O
O
I
I
I
I
O
I
O
O
I/O
O
I/O
O
O
I
I
O
O
14-17
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