Datasheet

Exception Control
MC68HC908GP32 Data Sheet, Rev. 10
Freescale Semiconductor 167
14.5.1.3 Interrupt Status Registers
The flags in the interrupt status registers identify maskable interrupt sources. Table 14-3 summarizes the
interrupt sources and the interrupt status register flags that they set. The interrupt status registers can be
useful for debugging.
Interrupt Status Register 1
IF6–IF1 — Interrupt Flags 1–6
These flags indicate the presence of interrupt requests from the sources shown in Table 14-3.
1 = Interrupt request present
0 = No interrupt request present
Table 14-3. Interrupt Sources
Priority Interrupt Source
Interrupt Status
Register Flag
Highest Reset —
SWI instruction —
IRQ pin IF1
PLL IF2
TIM1 channel 0 IF3
TIM1 channel 1 IF4
TIM1 overflow IF5
TIM2 channel 0 IF6
TIM2 channel 1 IF7
TIM2 overflow IF8
SPI receiver full IF9
SPI transmitter empty IF10
SCI receive error IF11
SCI receive IF12
SCI transmit IF13
Keyboard IF14
ADC conversion complete IF15
Lowest Timebase module IF16
Address: $FE04
Bit 7654321Bit 0
Read: IF6 IF5 IF4 IF3 IF2 IF1 0 0
Write: RRRRRRRR
Reset:00000000
R = Reserved
Figure 14-12. Interrupt Status Register 1 (INT1)