Motorola MCF5281 External Boot Mode, Listing of signals that do not default to a Gpio function

Overview

listing of signals that do not default to a GPIO function.

Table 14-4. Pin Reset States at Reset (Single-Chip Mode)

	Signal			Reset	I/O
				Clock and Reset Signals
				—	I
			RSTI
				Low	O
		RSTO
	EXTAL			—	I
		XTAL		XTAL	O
	CLKOUT			CLKOUT	O
				Debug Support Signals
	JTAG_EN			—	I
				—	I
DSCLK/TRST
				—	I
	BKPT/TMS
	DSI/TDI			—	I
	DSO/TDO			High	O
		TCLK		—	I
DDATA[3:0]				DDATA{3:0]	O
	PST[3:0]			PST[3:0]	O

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 14-4will operate as described above. All other signals will default to GPIO inputs.

Table 14-5. Default Signal Functions After System

Reset (External Boot Mode)

	Signal	Reset	I/O
A[23:0]		A[23:0]	O
D[31:0]		—	I/O
		High	O
BS[3:0]
		High	O
OE
		—	I
TA
		—	I
TEA
		High	O
R/W
SIZ[1:0]		High	O

MOTOROLA Chapter 14. Signal Descriptions 14-17