MC908GR16ACFA FREESCALE [Freescale Semiconductor, Inc], MC908GR16ACFA Datasheet - Page 140

• Manufacturer Part Number: MC908GR16ACFA
• Description: M68HC08 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Resets and Interrupts
Interrupts must be acknowledged by writing a 1 to the TACK bit.
13.3.3 Interrupt Status Registers
The flags in the interrupt status registers identify maskable interrupt sources.
Table 13-2
interrupt status registers can be useful for debugging.
13.3.3.1 Interrupt Status Register 1
IF6–IF1 — Interrupt Flags 6–1
Bit 1 and Bit 0 — Always read 0
140
These flags indicate the presence of interrupt requests from the sources shown in
1 = Interrupt request present
0 = No interrupt request present
summarizes the interrupt sources and the interrupt status register flags that they set. The
Address:
Reset:
Read:
Write:
Reset
SWI instruction
IRQ pin
CGM change of lock
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
$FE04
Bit 7
IF6
R
R
0
Interrupt Source
Figure 13-6. Interrupt Status Register 1 (INT1)
= Reserved
IF5
R
Table 13-2. Interrupt Source Flags
6
0
MC68HC908GR16A Data Sheet, Rev. 1.0
IF4
R
5
0
IF3
R
4
0
Interrupt Status Register Flag
IF2
R
3
0
IF10
IF11
IF12
IF13
IF14
IF15
IF16
IF1
IF2
IF3
IF4
IF5
IF6
IF7
IF8
IF9
—
—
IF1
R
2
0
R
1
0
0
Freescale Semiconductor
Table
Bit 0
R
0
0
13-2.