Справочник Пользователя для Motorola MC68HC908MR16
Advance Information
MC68HC908MR16/MC68HC908MR32 — Rev. 4.0
40
Memory Map
MOTOROLA
Memory Map
Similarly, some I/O bits are write only; the read function is
unimplemented. Reading of write-only I/O bits has no effect on MCU
operation. In register figures, the read function of write-only bits is
shaded.
unimplemented. Reading of write-only I/O bits has no effect on MCU
operation. In register figures, the read function of write-only bits is
shaded.
2.4 Reserved Memory Locations
Some addresses are reserved. Writing to a reserved address can
have unpredictable effects on MCU operation. In the memory map,
have unpredictable effects on MCU operation. In the memory map,
, and in the I/O register summary,
, reserved
addresses are marked with the word reserved.
Some I/O bits are reserved. Writing to a reserved bit can have
unpredictable effects on MCU operation. In register figures, reserved
bits are marked with the letter R.
unpredictable effects on MCU operation. In register figures, reserved
bits are marked with the letter R.
2.5 I/O Section
, contain most of the
control, status, and data registers. Additional I/O registers have these
addresses:
addresses:
•
$FE00, SIM break status register (SBSR)
•
$FE01, SIM reset status register (SRSR)
•
$FE03, SIM break flag control register (SBFCR)
•
$FE07, FLASH control register (FLCR)
•
$FE0C, Break address register high (BRKH)
•
$FE0D, Break address register low (BRKL)
•
$FE0E, Break status and control register (BRKSCR)
•
$FE0F, LVI status and control register (LVISCR)
•
$FF7E, FLASH block protect register (FLBPR)
•
$FFFF, COP control register (COPCTL)