XC68HC08KH12 Motorola, XC68HC08KH12 Datasheet - Page 54

• Manufacturer Part Number: XC68HC08KH12
• Description: MICROCONTROLLER
• Manufacturer: Motorola

Central Processor Unit (CPU)
6.4.2 Index Register (H:X)
Advance Information
54
The 16-bit index register allows indexed addressing of a 64-Kbyte
memory space. H is the upper byte of the index register, and X is the
lower byte. H:X is the concatenated 16-bit index register.
In the indexed addressing modes, the CPU uses the contents of the
index register to determine the conditional address of the operand.
The index register can serve also as a temporary data storage location.
Reset:
Read:
Write:
Bit
15
0
14
Central Processor Unit (CPU)
0
13
0
Figure 6-3. Index Register (H:X)
12
0
11
0
10
0
X = Indeterminate
9
0
8
0
X
7
X
6
MC68HC(7)08KH12
X
5
X
4
X
3
X
MOTOROLA
2
—
Rev. 1.0
X
1
Bit
X
0