CHAPTER 12 INTERRUPT FUNCTIONS
User’s Manual U16898EJ3V0UD
219
(2) Interrupt mask flag registers (MK0, MK1)
The interrupt mask flag is used to enable and disable the corresponding maskable interrupts.
MK0 and MK1 are set with a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets MK0 and MK1 to FFH.
Figure 12-3. Format of Interrupt Mask Flag Registers (MK0, MK1)
Address: FFE4H After reset: FFH R/W
Symbol
<7> <6> <5> <4> <3> <2> <1> 0
MK0 ADMK
TMMK010
TMMK000
TMMKH1
PMK1 PMK0 LVIMK 1
Address: FFE5H After reset: FFH R/W
Symbol
7 <6> <5> <4> <3> <2> <1> 0
MK1
1
STMK6 SRMK6 SREMK6
TMMK80 PMK3 PMK2
1
××
MK
×
Interrupt servicing control
0
Enables interrupt servicing.
1
Disables interrupt servicing.
Caution Because P30, P31, P41, and P43 have an alternate function as external interrupt inputs,
when the output level is changed by specifying the output mode of the port function, an
interrupt request flag is set. Therefore, the interrupt mask flag should be set to 1 before
using the output mode.