Freescale Semiconductor MC68HC08KH12 Manual de usuario Pagina 77

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MC68HC(7)08KH12Rev. 1.1 Advance Information
Freescale Semiconductor
77
7.6.2.1 Interrupt Status Register 1
IF6–IF1 — Interrupt Flags 1–6
These flags indicate the presence of interrupt requests from the
sources shown in Table 7-3.
1 = Interrupt request present
0 = No interrupt request present
Bit 0 and Bit 1 — Always read 0
Port-D Keyboard Pin Interrupt KEYDF IMASKD IF9 9 $FFEA–$FFEB
Port-F Keyboard Pin Interrupt KEYFF IMASKF IF10 10 $FFE8–$FFE9
Phase-locked Loop Interrupt PLLF PLLIE IF11 11 $FFE6–$FFE7
(1) The I bit in the condition code register is a global mask for all interrupts sources except the SWI instruction.
(2) 0= highest priority
Table 7-3. Interrupt Sources
Source Flag
Mask
(1)
INT
Register
Flag
Priority
(2)
Vector Address
Address: $FE04
Bit 7654321Bit 0
Read: IF6 IF5 IF4 IF3 IF2 IF1 0 0
Write:RRRRRRRR
Reset:00000000
R= Reserved
Figure 7-12. Interrupt Status Register 1 (INT1)
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