Motorola 24-Bit Digital Signal Processor, DSP56000 PORT A INTERFACE, 8 - 4 PORT A, , Figure 8-1 Port A Signals, signals (A0-A15), data bus signals (D0-D15), and bus control. The bus control signals can

PORT A INTERFACE
8 - 4 PORT A MOTOROLA
signals (A0-A15), data bus signals (D0-D15), and bus control. The bus control signals can
EXTERNAL
ADDRESS BUS
SWITCH
EXTERNAL
ADDRESS BUS
A0 - A15
X ADDRESS (XA)
Y ADDRESS (YA)
PROGRAM ADDRESS (PA)
16 - BIT INTERNAL
ADDRESS BUSES
16
EXTERNAL
DATA BU S
SWITCH
EXTERNAL
DATA BU S
D0 - D23
X DATA (XD)
Y DATA (YD)
PROGRAM DATA (PD)
24 - BIT INTERNAL
DATA BUSES
24
GLOBAL DATA (GD)
EXTERNAL
BUS CONTROL
LOGIC
BUS CONTROL SIGNALS
RD - READ ENABLE
WR - WRITE ENABLE
PS - PROGRAM MEMORY SELECT
DS - DATA MEMORY SELECT
X/Y - X MEMORY/Y MEMORY SELECT
BUS ACCESS CONTROL PINS
Figure 8-1 Port A Signals