MC68HC08GP32A Datasheet, PDF (133/258 Pages) Freescale Semiconductor, Inc – Microcontrollers

Interrupts
13.3.3 Interrupt Status Registers
The flags in the interrupt status registers identify maskable interrupt sources. Table 13-2 summarizes the
interrupt sources and the interrupt status register flags that they set. The interrupt status registers can be
useful for debugging.
Table 13-2. Interrupt Source Flags
Interrupt Source
Reset
SWI instruction
IRQ pin
CGM (PLL)
TIM1 channel 0
TIM1 channel 1
TIM1 overflow
TIM2 channel 0
TIM2 channel 1
TIM2 overflow
SPI receive
SPI transmit
SCI error
SCI receive
SCI transmit
Keyboard
ADC conversion complete
Timebase
Interrupt Status
Register Flag
—
—
IF1
IF2
IF3
IF4
IF5
IF6
IF7
IF8
IF9
IF10
IF11
IF12
IF13
IF14
IF15
IF16
13.3.3.1 Interrupt Status Register 1
Address: $FE04
Bit 7
6
5
4
3
2
Read: IF6
IF5
IF4
IF3
IF2
IF1
1
Bit 0
0
0
Write: R
R
R
R
R
R
R
R
Reset: 0
0
0
0
0
0
0
0
R = Reserved
Figure 13-7. Interrupt Status Register 1 (INT1)
IF6–IF1 — Interrupt Flags 6–1
These flags indicate the presence of interrupt requests from the sources shown in Table 13-2.
1 = Interrupt request present
0 = No interrupt request present
Bit 1 and Bit 0 — Always read 0
MC68HC08GP32A • MC68HC08GP16A Data Sheet, Rev. 1.0
Freescale Semiconductor
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