CHAPTER 13 INTERRUPT FUNCTIONS
Preliminary User’s Manual U19014EJ1V0UD
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(2) Interrupt mask flag registers (MK0L, MK0H, MK1L, MK1H)
The interrupt mask flags are used to enable/disable the corresponding maskable interrupt servicing.
MK0L, MK0H, MK1L, and MK1H are set by a 1-bit or 8-bit memory manipulation instruction. When MK0L and
MK0H, and MK1L and MK1H are combined to form 16-bit registers MK0 and MK1, they are set by a 16-bit
memory manipulation instruction.
Reset signal generation sets these registers to FFH.
Figure 13-3. Format of Interrupt Mask Flag Registers (MK0L, MK0H, MK1L, MK1H)
Address: FFE4H After reset: FFH R/W
Symbol <7> <6> <5> <4> <3> <2> <1> <0>
MK0L
SREMK6
USBMK1
USBMK0
PMK3 PMK2 PMK1 PMK0 LVIMK
Address: FFE5H After reset: FFH R/W
Symbol <7> <6> <5> <4> <3> <2> <1> <0>
MK0H TMMK010
TMMK000
TMMK50
USBMK2
TMMKH1
CSIMK0
STMK6
SRMK6
Address: FFE6H After reset: FFH R/W
Symbol 7 6 5 4
<3>
2 1
<0>
MK1L 1 1 1 1
TMMK51
1 1
RSUMMK
Address: FFE7H After reset: FFH R/W
Symbol 7 6 5 4 3 2 1 0
MK1H 1 1 1 1 1 1 1 1
XXMKX
Interrupt servicing control
0
Interrupt servicing enabled
1
Interrupt servicing disabled
Caution Be sure to set bits 1, 2, 4 to 7 of MK1L and bits 0 to 7 of MK1H to 1.
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