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CHAPTER 19 INTERRUPT FUNCTIONS
(2) Interrupt mask flag registers (MK0L, MK0H, MK1L)
The interrupt mask flags are used to enable/disable the corresponding maskable interrupt service.
MK0L, MK0H, and MK1L are set with a 1-bit or 8-bit memory manipulation instruction. When MK0L and MK0H
are combined to form a 16-bit register MK0, they are set with a 16-bit memory manipulation instruction.
RESET input sets these registers to FFH.
Figure 19-3. Interrupt Mask Flag Register (MK0L, MK0H, MK1L) Format
Address: FFE4H After Reset: FFH R/W
Symbol
7
6
5
4
3
2
1
0
MK0L
PMK1
PMK0
TMMK02
TMMK01
TMMK00
OVFMK
ADMK
WDTMK
Address: FFE5H After Reset: FFH R/W
Symbol
7
6
5
4
3
2
1
0
MK0H
TMMK3
TMMK2
TMMK1
STMK
SRMK
SERMK
CSIMK
PMK2
Address: FFE6H After Reset: FFH R/W
Symbol
7
6
5
4
3
2
1
0
MK1L
1
1
1
1
1
WTMK
WTIMK
WEMK
XXMKX
Interrupt Servicing Control
0
Interrupt servicing enabled
1
Interrupt servicing disabled
Cautions 1. If the watchdog timer is used in watchdog timer mode 1, the contents of the WDTMK flag
become undefined when read.
2. Because port 0 pins have an alternate function as external interrupt request input, when
the output level is changed by specifying the output mode of the port function, an
interrupt request flag is set. Therefore, 1 should be set in the interrupt mask flag before
using the output mode.
3. Be sure to set 1 to MK1L bits 3 to 7.
Содержание mPD780973 Series
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