UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 546

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

20.3.2 Interrupt Mask Registers (MK0/MK1L)
bit units, MK0L and MK0H, as well as being manipulated as a 16-bit unit.
manipulated individually with a bit manipulation instruction. Each interrupt mask flag controls enabling/disabling of the
corresponding interrupt request.
interrupt or macro service request.
The MK0 and MK1L are provided for en bloc control of interrupt masking.
(1) Byte Accesses
506
MK0H
MK0L
MK1L
The MK0 and MK1L are composed of interrupt mask flags. MK0 is a 16-bit register which can be manipulated as 8-
MK1L is an 8-bit register that can be manipulated as an 8-bit unit. In addition, each bit of the MK0 and MK1L can be
When an interrupt mask flag is set (1), acknowledgment of the corresponding interrupt request is disabled.
When an interrupt mask flag is cleared (0), the corresponding interrupt request can be acknowledged as a vectored
Each interrupt mask flag in the MK0 and MK1L is the same flag as the interrupt mask flag in the interrupt control register.
After RESET input, the MK0 is set to FFFFH, the MK1L is set to FFH, and all maskable interrupts are disabled.
CMK11
CSIMK1
SRMK
7
1
SERMK
CMK10
6
1
Figure 20-2 Interrupt Mask Register (MK0, MK1L) Format (1/2)
CMK01 CMK00
ADMK
5
1
STMK2
PMK5
4
CHAPTER 20 INTERRUPT FUNCTIONS
CSIMK2
SRMK2
PMK3
PMK4
3
SERMK2 CSIMK
CMK30
PMK2
2
CMK21
PMK1
1
CMK20
PMK0
STMK
0
0FFACH
0FFADH
0FFAEH
Address
MK
0
1
Interrupt Request Enabling/Disabling
Specification
Interrupt processing enabled
Interrupt processing disabled
On Reset
FFFFH
FFFFH
FFH
R/W
R/W
R/W
R/W