MC68HC908GR8CDW Freescale Semiconductor, MC68HC908GR8CDW Datasheet - Page 141

• Manufacturer Part Number: MC68HC908GR8CDW
• Description: IC MCU 8K FLASH 8MHZ 28-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GR8CDW

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 17
• Program Memory Size: 7.5KB (7.5K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

10.4.1 Accumulator (A)
10.4.2 Index register (H:X)
MC68HC908GR8 — Rev 4.0
MOTOROLA
A
H:X
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 64K byte
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 Processing Unit (CPU)
Go to: www.freescale.com
Figure 10-3. Index register (H:X)
13
0
Figure 10-2. Accumulator (A)
6
12
0
11
0
5
10
0
Unaffected by reset
9
0
4
8
0
X
7
3
X
6
Central Processing Unit (CPU)
X
5
2
X
4
X
3
1
Technical Data
CPU registers
2
X
X
1
Bit 0
Bit
141
X
0