MC68HC908GP32CFB Freescale Semiconductor, MC68HC908GP32CFB Datasheet - Page 78

• Manufacturer Part Number: MC68HC908GP32CFB
• Description: IC MCU 8MHZ 32K FLASH 44-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GP32CFB

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 33
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-QFP
• For Use With: M68EVB908GP32 - BOARD EVALUATION FOR HC908GP32
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Resets and Interrupts
Technical Data
76
After every instruction, the CPU checks all pending interrupts if the I bit
is not set. If more than one interrupt is pending when an instruction is
done, the highest priority interrupt is serviced first. In the example shown
in
service routine, the pending interrupt is serviced before the LDA
instruction is executed.
STACKING
Figure
•
•
ORDER
Sets the interrupt mask (I bit) to prevent additional interrupts.
Once an interrupt is latched, no other interrupt can take
precedence, regardless of its priority.
Loads the program counter with a user-defined vector address
4-5, if an interrupt is pending upon exit from the interrupt
5
4
3
2
1
*High byte of index register is not stacked.
PROGRAM COUNTER (HIGH BYTE)
PROGRAM COUNTER (LOW BYTE)
Resets and Interrupts
INDEX REGISTER (LOW BYTE)*
CONDITION CODE REGISTER
Figure 4-4. Interrupt Stacking Order
ACCUMULATOR
•
•
•
•
•
•
MC68HC908GP32
1
2
3
4
5
$00FF DEFAULT ADDRESS ON RESET
UNSTACKING
ORDER
•
MC68HC08GP32
MOTOROLA
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Rev. 6