MC705C8ABE Freescale Semiconductor, MC705C8ABE Datasheet - Page 45

• Manufacturer Part Number: MC705C8ABE
• Description: IC MCU 8BIT 42-SDIP
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC705C8ABE

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: OTP
• Ram Size: 304 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 42-DIP (0.600", 15.24mm)
• Processor Series: HC705C
• Core: HC05
• Data Bus Width: 8 bit
• Data Ram Size: 304 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 2.1 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 1
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

3.3.1 Accumulator
3.3.2 Index Register
MC68HC705C8A — Rev. 3
MOTOROLA
The accumulator (A) shown in
register. The CPU uses the accumulator to hold operands and results of
arithmetic and non-arithmetic operations.
Reset:
In the indexed addressing modes, the CPU uses the byte in the index
register (X) shown in
the operand. See
Offset, and
indexed addressing.
The 8-bit index register also can serve as a temporary data storage
location.
Reset:
Read:
Read:
Write:
Write:
Freescale Semiconductor, Inc.
For More Information On This Product,
Bit 7
Bit 7
Central Processor Unit (CPU)
12.3.7 Indexed, 16-Bit Offset
Go to: www.freescale.com
6
6
12.3.5 Indexed, No
Figure 3-3. Index Register (X)
Figure 3-2. Accumulator (A)
Figure 3-3
5
5
Figure 3-2
Unaffected by reset
Unaffected by reset
to determine the conditional address of
4
4
Offset,
3
3
is a general-purpose 8-bit
for more information on
12.3.6 Indexed, 8-Bit
Central Processor Unit (CPU)
2
2
1
1
CPU Registers
Technical Data
Bit 0
Bit 0