MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 89

• Manufacturer Part Number: MC68HC12
• Description: The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit
• Manufacturer: MOTOROLA [Motorola, Inc]

INITRG — Initialization of Internal Register Position Register
6.3.1 Register Block Mapping
MC68HC912DT128A — Rev 4.0
MOTOROLA
RESET:
REG15
Bit 7
0
REG14
6
0
After reset the 1K byte register block resides at location $0000 but can
be reassigned to any 2K byte boundary within the standard 64K byte
address space. Mapping of internal registers is controlled by five bits in
the INITRG register. The register block occupies the first 1K byte of the
2K byte block.
REG[15:11] — Internal register map position
MMSWAI — Memory Mapping Interface Stop in Wait Control
These bits specify the upper five bits of the 16-bit registers address.
Normal modes: write once; special modes: write anytime. Read
anytime.
This bit controls access to the memory mapping interface when in
Wait mode.
Normal modes: write anytime; special modes: write never. Read
anytime.
0 = Memory mapping interface continues to function during Wait
1 = Memory mapping interface access is shut down during Wait
REG13
5
0
mode.
mode.
Resource Mapping
REG12
4
0
REG11
3
0
2
0
0
1
0
0
Internal Resource Mapping
MMSWAI
Resource Mapping
Bit 0
0
Technical Data
$0011
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