dsp56001a Freescale Semiconductor, Inc, dsp56001a Datasheet - Page 85

• Manufacturer Part Number: dsp56001a
• Description: 24-bit Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

A system with external data RAM memory requires no glue logic to select the external EPROM
from Bootstrap mode. PS is used to enable the EPROM and DS is used to enable the high speed
data memories, as shown in Figure 4-2.
MOTOROLA
RESET
Note:
IRQB
IRQA
1. All resistors are 15 K unless noted otherwise.
2. When in Reset, IRQA and IRQB must be deasserted by external peripherals.
Figure 4-2 Port A Bootstrap with External Data RAM—Mode 1
+5 V
Freescale Semiconductor, Inc.
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MODB/
IRQB
MODA/
IRQA
RESET
BR
HACK
DSP56001A
DSP56001A/D, Rev. 1
D0–D23
A0–A10
WR
X/Y
RD
DS
PS
CE
11
D0–D7
2716
A0–A10
8
10
D0–D23
A0–A9 A10 CS WE OE
2018-55 (3)
24
Application Examples
D23
+5 V
DSP56001A
AA0905
4-11