OVERVIEW
MC68332
3-10
USER’S MANUAL
3.6.1 Internal Register Map
, IMB ADDR[23:20] are represented by the letter Y. The value represent-
ed by Y determines the base address of MCU module control registers. In M68300 mi-
crocontrollers, Y is equal to M111, where M is the logic state of the module mapping
(MM) bit in the system integration module configuration register (SIMCR).
Figure 3-4 Internal Register Memory Map
3.6.2 Address Space Maps
shows a single memory space. Function codes FC[2:0] are not decoded
externally so that separate user/supervisor or program/data spaces are not provided.
In
, FC2 is decoded, resulting in separate supervisor and user spaces.
FC[1:0] are not decoded, so that separate program and data spaces are not provided.
In
, FC[2:0] are decoded, resulting in four separate memory
spaces: supervisor/program, supervisor/data, user/program and user/data.
All exception vectors are located in supervisor data space, except the reset vector,
which is located in supervisor program space. Only the initial reset vector is fixed in
the processor's memory map. Once initialization is complete, there are no fixed as-
signments. Since the vector base register (VBR) provides the base address of the vec-
tor table, the vector table can be located anywhere in memory. Refer to
for more information concerning memory manage-
ment, extended addressing, and exception processing.
Refer to
for more information concerning function codes and ad-
dress space types.
332 ADDRESS MAP
SIM
RESERVED
QSM
$YFFC00
$YFFB40
$YFF000
2-KBYTE
TPURAM ARRAY
$YFFA00
TPURAM CONTROL
$YFFB00
RESERVED
$YFFA80
TPU
$YFFFFF
$YFFE00
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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