Motorola 24-Bit Digital Signal Processor, DSP56000 manual Port a Signals

PORT A INTERFACE

16 - BIT INTERNAL
ADDRESS BUSES
X ADDRESS (XA)
		16
	EXTERNAL	EXTERNAL
Y ADDRESS (YA)	ADDRESS BUS	ADDRESS BUS
	SWITCH	A0 - A15
PROGRAM ADDRESS (PA)
24 - BIT INTERNAL
DATA BUSES
X DATA (XD)
		24
Y DATA (YD)		EXTERNAL
	EXTERNAL	DATA BUS
		D0 - D23
	DATA BUS
	SWITCH
PROGRAM DATA (PD)
GLOBAL DATA (GD)
		BUS CONTROL SIGNALS
		RD - READ ENABLE
	EXTERNAL	WR - WRITE ENABLE
		PS - PROGRAM MEMORY SELECT
	BUS CONTROL	DS - DATA MEMORY SELECT
	LOGIC
		X/Y - X MEMORY/Y MEMORY SELECT
		BUS ACCESS CONTROL PINS

Figure 8-1 Port A Signals

signals (A0-A15), data bus signals (D0-D15), and bus control. The bus control signals can

8 - 4 PORT A MOTOROLA