MC68HC908AS60CFN Freescale Semiconductor, MC68HC908AS60CFN Datasheet - Page 116

• Manufacturer Part Number: MC68HC908AS60CFN
• Description: IC MCU 60K FLASH 8MHZ 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908AS60CFN

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8.4MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 40
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 15x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Central Processor Unit (CPU)
8.4.1 Accumulator (A)
8.4.2 Index Register (H:X)
Technical Data
Reset:
Read:
Write:
Reset:
Read:
Write:
The accumulator is a general-purpose 8-bit register. The CPU uses the
accumulator to hold operands and the results of arithmetic/logic
operations.
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 also be used as a temporary data storage
location.
Freescale Semiconductor, Inc.
X = Indeterminate
For More Information On This Product,
Bit
15
0
Bit 7
14
0
Central Processor Unit (CPU)
Go to: www.freescale.com
13
0
6
Figure 8-3. Index Register (H:X)
12
0
Figure 8-2. Accumulator (A)
11
0
5
10
0
Unaffected by reset
9
0
4
8
0
7
X
3
X
6
MC68HC908AS60 — Rev. 1.0
X
5
2
X
4
X
3
1
X
2
X
1
Bit 0
Bit
X
0