MC68HC705C8ACB Freescale Semiconductor, MC68HC705C8ACB Datasheet - Page 58

• 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

Interrupts
Technical Data
58
NOTE:
If more than one interrupt request is pending, the CPU fetches the vector
of the higher priority interrupt first. A higher priority interrupt does not
interrupt a lower priority interrupt service routine unless the lower priority
interrupt service routine clears the I bit. See
listing.
Figure 4-5
STACKING
Freescale Semiconductor, Inc.
ORDER
5
4
3
2
1
For More Information On This Product,
UNSTACKING
ORDER
1
2
3
4
5
shows the sequence of events caused by an interrupt.
Go to: www.freescale.com
Figure 4-4. Interrupt Stacking Order
Interrupts
PROGRAM COUNTER (HIGH BYTE)
PROGRAM COUNTER (LOW BYTE)
CONDITION CODE REGISTER
INDEX REGISTER
ACCUMULATOR
•
•
•
•
•
•
Table 4-1
MC68HC705C8A — Rev. 3
$00C0 (BOTTOM OF STACK)
$00C1
$00C2
$00FD
$00FE
$00FF (TOP OF STACK)
•
•
•
•
•
•
for a priority