Port A Interface - Motorola DSP56000 Manual

24-bit digital signal processor
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16 - BIT INTERNAL
ADDRESS BUSES
X ADDRESS (XA)
Y ADDRESS (YA)
PROGRAM ADDRESS (PA)
24 - BIT INTERNAL
DATA BUSES
X DATA (XD)
Y DATA (YD)
PROGRAM DATA (PD)
GLOBAL DATA (GD)
signals (A0-A15), data bus signals (D0-D15), and bus control. The bus control signals can
8 - 4

PORT A INTERFACE

EXTERNAL
ADDRESS BUS
SWITCH
EXTERNAL
DATA BUS
SWITCH
EXTERNAL
BUS CONTROL
LOGIC
Figure 8-1 Port A Signals
PORT A
16
EXTERNAL
ADDRESS BUS
A0 - A15
24
EXTERNAL
DATA BUS
D0 - D23
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
MOTOROLA

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