MC68HC908GP16CFB Freescale Semiconductor, MC68HC908GP16CFB Datasheet - Page 161

• Manufacturer Part Number: MC68HC908GP16CFB
• Description: MCU 8-BIT 16K FLASH 44-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GP16CFB

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 33
• Program Memory Size: 16KB (16K 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
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

14.5.1 Interrupts
At the beginning of an interrupt, the CPU saves the CPU register contents on the stack and sets the
interrupt mask (I bit) to prevent additional interrupts. At the end of an interrupt, the return-from-interrupt
(RTI) instruction recovers the CPU register contents from the stack so that normal processing can
resume.
Interrupts are latched, and arbitration is performed in the SIM at the start of interrupt processing. The
arbitration result is a constant that the CPU uses to determine which vector to fetch. As shown in
Figure
of priority, until the latched interrupt is serviced or the I bit is cleared.
Freescale Semiconductor
INTERRUPT
INTERRUPT
MODULE
I BIT
I BIT
R/W
R/W
IDB
IDB
IAB
IAB
MODULE
14-9, once an interrupt is latched by the SIM, no other interrupt can take precedence, regardless
Figure 14-7
DUMMY
DUMMY
shows interrupt entry timing.
SP – 4
SP
MC68HC908EY16 • MC68HC908EY8 Data Sheet, Rev. 10
PC – 1[7:0] PC – 1[15:8]
CCR
SP – 1
SP – 3
Figure 14-8. Interrupt Recovery
Figure 14-7
A
SP – 2
SP – 2
X
X
.
Figure 14-8
SP – 3
SP – 1
Interrupt Entry
PC – 1 [7:0] PC – 1 [15:8] OPCODE
A
SP – 4
SP
shows interrupt recovery timing.
CCR
VECT H
PC
V DATA H
VECT L
PC + 1
OPERAND
V DATA L
Program Exception Control
START ADDR
OPCODE
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