UPD78F0138 NEC, UPD78F0138 Datasheet - Page 367

• Manufacturer Part Number: UPD78F0138
• Description: (UPD78xxxx) 8-Bit Single-Chip Microcontrollers
• Manufacturer: NEC

(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 with a 16-bit
memory manipulation instruction.
RESET input sets MK0L, MK0H, and MK1L to FFH and sets MK1H to DFH.
Notes 1.
Address: FFE4H
Symbol
MK0L
Address: FFE5H
Symbol
MK0H
Address: FFE6H
Symbol
MK1L
Address: FFE7H
Symbol
MK1H
2.
Figure 17-3. Format of Interrupt Mask Flag Registers (MK0L, MK0H, MK1L, MK1H)
Be sure to set bits 4, 6, and 7 of MK1H to 1. Be sure to clear bit 5 of MK1H to 0.
µ
and 780132 to 1.
PD780133, 780134, 78F0134, 780136, 780138, and 78F0138 only. Be sure to set the
TMMK010
SREMK6
XXMKX
PMK7
1
<7>
<7>
<7>
Note 1
7
0
1
After reset: FFH
After reset: FFH
After reset: FFH
After reset: DFH
Interrupt servicing enabled
Interrupt servicing disabled
TMMK000
PMK5
PMK6
1
<6>
<6>
<6>
Note 1
6
CHAPTER 17 INTERRUPT FUNCTIONS
R/W
R/W
R/W
R/W
TMMK50
WTMK
PMK4
0
<5>
<5>
<5>
Note 1
User’s Manual U16228EJ2V0UD
5
TMMKH0
KRMK
PMK3
1
<4>
<4>
<4>
Note 1
4
Interrupt servicing control
TMMK011
TMMKH1
TMMK51
PMK2
<3>
<3>
<3>
<3>
Note 2
TMMK001
DUALMK0
WTIMK
PMK1
<2>
<2>
<2>
<2>
Note 2
CSIMK11
SRMK0
STMK6
PMK0
<1>
<1>
<1>
<1>
Note 2
DMUMK
SRMK6
LVIMK
ADMK
<0>
<0>
<0>
<0>
µ
PD780131
367