MC68HC705JP7CDW Freescale Semiconductor, MC68HC705JP7CDW Datasheet - Page 34

• Manufacturer Part Number: MC68HC705JP7CDW
• Description: IC MCU 8BIT 28-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705JP7CDW

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SIO
• Peripherals: POR, Temp Sensor, WDT
• Number Of I /o: 22
• Program Memory Size: 6KB (6K x 8)
• Program Memory Type: OTP
• Ram Size: 224 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x12b
• 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: -

Interrupts
4.3 Interrupt Processing
To begin servicing an interrupt, the CPU does these actions:
The return-from-interrupt (RTI) instruction causes the CPU to recover its register contents from the stack
as shown in
Figure
34
•
•
•
Stores the CPU registers on the stack in the order shown in
Sets the I bit in the condition code register to prevent further interrupts
Loads the program counter with the contents of the appropriate interrupt vector locations as shown
in
4-2.
Table 4-1
Figure
MC68HC705JJ7 • MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
4-1. The sequence of events caused by an interrupt is shown in the flowchart in
$00BE
$00FD
$00BF
$00C0
$00C1
$00C2
$00FE
$00FF
$0020
$0021
n+1
n+2
n+3
n+4
n
Figure 4-1. Interrupt Stacking Order
Program Counter (High Byte)
Program Counter (Low Byte)
Condition Code Register
Top of Stack (RAM)
Bottom of Stack
Bottom of RAM
Index Register
Accumulator
Stacking
Order
Figure 4-1
5
4
3
2
1
›
Unstacking
Order
?
1
2
3
4
5
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