MC68HC705C8ACB Freescale Semiconductor, MC68HC705C8ACB Datasheet - Page 44

• Manufacturer Part Number: MC68HC705C8ACB
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705C8ACB

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 2.1MHz
• Interface Type: SCI/SPI
• Program Memory Type: EPROM
• Program Memory Size: 8KB
• Total Internal Ram Size: 304Byte
• # I/os (max): 24
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 3V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 42
• Package Type: SPDIP
• Lead Free Status / Rohs Status: Not Compliant

Central Processor Unit (CPU)
3.3 CPU Registers
Technical Data
44
Figure 3-1
within the CPU and are not part of the memory map.
Bit 12 11
Bit 12 11
Freescale Semiconductor, Inc.
0
For More Information On This Product,
0
10
10
0
shows the five CPU registers. These are hard-wired registers
Central Processor Unit (CPU)
CARRY/BORROW FLAG
Go to: www.freescale.com
9
0
9
HALF-CARRY FLAG
INTERRUPT MASK
NEGATIVE FLAG
8
0
8
Figure 3-1. Programming Model
ZERO FLAG
Bit 7
Bit 7
Bit 7
7
1
7
1
6
6
6
1
6
6
1
5
5
5
5
5
1
H
4
4
4
4
4
3
3
3
3
3
I
N
2
2
2
2
2
1
1
1
1
1
Z
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
C
INDEX REGISTER (X)
STACK POINTER (SP)
PROGRAM COUNTER (PC)
CONDITION CODE REGISTER (CCR)
ACCUMULATOR (A)
MC68HC705C8A — Rev. 3