UPD178023 Datasheet, PDF (28/56 Pages) NEC – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD178023, 178024
4. INTERRUPT FUNCTION
The µPD178023 and 178024 have the following three types and 17 sources of interrupts:
• Non-maskable : 1^Note
• Maskable
: 16^Note
• Software
:1
Note Two types of watchdog interrupt sources (INTWDT), non-maskable and maskable, are available, and
either of them can be selected.
Table 4-1. Interrupt Sources
Default
Interrupt Type _{PriorityNote 1}
Name
Interrupt Source
Trigger
Internal/
External
Vector
Table
Address
Basic
Configuration
Type^{Note 2}
Non-maskable
–
INTWDT Overflow of watchdog timer
Internal 0004H (A)
(when watchdog timer mode 1 is selected)
Maskable
0
INTWDT Overflow of watchdog timer
(B)
(when interval timer mode is selected)
1
INTP0 Pin input edge detection
External 0006H (C)
2
INTP1
0008H
3
INTP2
000AH
4
INTP3
000CH
5
INTP4
000EH
6
INTKY Detection of key input of port 4
Internal 0010H (B)
7
INTIIC0 End of transfer by serial interface IIC0
0012H
8
INTBTM0 Generation of basic timer match signal
0014H
9
INTAD3 End of conversion by A/D converter
0016H
10
–
–
–
0018H^{Note 3}
–
11
INTCSI3 End of transfer by serial interface SIO3
Internal 001AH (B)
12
INTTM50 Generation of coincidence signal of 8-bit
timer/event counter 50
001CH
13
INTTM51 Generation of coincidence signal of 8-bit
timer/event counter 51
001EH
14
INTSER0 Reception error of serial interface UART0
0020H
15
INTSR0 End of reception by serial interface UART0
0022H
16
INTST0 End of transmission by serial interface UART0
0024H
Software
–
BRK
Execution of BRK instruction
–
003EH (D)
Notes 1. If two or more maskable interrupts occur at the same time, they are acknowledged or kept pending
according to their default priorities. The default priority 0 is the highest, while 16 is the lowest.
2. (A) to (D) under the heading Basic Configuration Type corresponds to (A) to (D) in Figure 4-1.
3. There are no interrupt sources corresponding to vector addresses 0018H.
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Data Sheet U14126EJ1V0DS00