MC908JL3ECPE Datasheet, PDF (59/180 Pages) Freescale Semiconductor, Inc – Microcontrollers

Exception Control
Table 5-3. Interrupt Sources
Priority
Source
Flag
MASK⁽¹⁾
INT
Register
Flag
Vector Address
Highest Reset
—
—
—
$FFFE–$FFFF
SWI Instruction
—
—
—
$FFFC–$FFFD
IRQ Pin
IRQF
IMASK
IF1
$FFFA–$FFFB
Timer Channel 0 Interrupt
CH0F
CH0IE
IF3
$FFF6–$FFF7
Timer Channel 1 Interrupt
CH1F
CH1IE
IF4
$FFF4–$FFF5
Timer Overflow Interrupt
TOF
TOIE
IF5
$FFF2–$FFF3
Keyboard Interrupt
KEYF
IMASKK
IF14
$FFE0–$FFE1
Lowest ADC Conversion Complete Interrupt
COCO
AIEN
IF15
$FFDE–$FFDF
1. The I bit in the condition code register is a global mask for all interrupts sources except the SWI instruction.
5.5.2.1 Interrupt Status Register 1
Address: $FE04
Bit 7
6
5
4
3
2
1
Bit 0
Read: 0
IF5
IF4
IF3
0
IF1
0
0
Write: R
R
R
R
R
R
R
R
Reset: 0
0
0
0
0
0
0
0
R = Reserved
Figure 5-12. Interrupt Status Register 1 (INT1)
IF1, IF3 to IF5 — Interrupt Flags
These flags indicate the presence of interrupt requests from the sources shown in Table 5-3.
1 = Interrupt request present
0 = No interrupt request present
Bit 0, 1, 3 and 7 — Always read 0
5.5.2.2 Interrupt Status Register 2
Address: $FE05
Bit 7
6
5
4
3
2
1
Bit 0
Read: IF14
0
0
0
0
0
0
0
Write: R
R
R
R
R
R
R
R
Reset: 0
0
0
0
0
0
0
0
R = Reserved
Figure 5-13. Interrupt Status Register 2 (INT2)
MC68HC908JL3E Family Data Sheet, Rev. 4
Freescale Semiconductor
59