Motorola DSP96002ADM, User Manual

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2-10 DSP96002ADMUM/AD, Preliminary MOTOROLA
DSP96002ADM Technical Summary
Configuring the DSP96002ADM
2.4.3 DSP96002 Port A/B User EPROM Decoders
Port A and B both contain sockets that accommodate EPROMs of various densities. Six
types of EPROMs, ranging from 2 K
×
8 to 64 K
×
8, may be installed in the sockets. The
lower density EPROMs come in 24-pin packages while the higher density EPROMs are
available in 28-pin packages.
Sockets must be configured to accommodate the specific package type and memory size.
The four jumpers (JG11–JG14) on Port A and the four jumpers (JG7–JG10) on Port B
connect V
CC
to the appropriate power input pin for the package type. The EPROM PAL
maps the EPROM to program memory space only, and jumpers JG19 and JG24 select the
memory block to which each group of EPROMs is mapped. Jumpers JG15 and JG16
connect the appropriate address pins to the address pins for the installed EPROM
device.
Table 2-4 and Table 2-5 on page 2-11 show how the different device types may
be configured.
Note: The ADM is factory-configured to use 2 K words of EPROM at the top of the
address map.
CAUTION
Improper installation of EPROM chips may result in
chip damage when power is applied. When using
24-pin chips, make sure that the chips are inserted into
the center of the EPROM sockets leaving positions 1, 2,
27, and 28 empty.
Table 2-4 Port A/B User EPROM Decoder
OPTION JG19 / JG24 EPROM MEMORY BLOCK
1 1–2, 3–4, 5–6 $00000000–$1FFFFFFF
2 3–4, 5–6 $20000000–$3FFFFFFF
3 1–2, 5–6 $40000000–$5FFFFFFF
4 5–6 $80000000–$9FFFFFFF
5 1–2, 3–4 $A0000000–$BFFFFFFF
6 (default) No jumpers $FF000000–$FFFFFFFF