UPD17073 NEC, UPD17073 Datasheet - Page 66

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UPD17073

Manufacturer Part Number
UPD17073
Description
4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
Manufacturer
NEC
Datasheet

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11. INTERRUPT
11.1 General
interrupt vector address according to an interrupt request output by each peripheral hardware.
peripheral hardware, “interrupt enable flip-flop” that enables all the interrupts, “stack pointer” that is controlled when
an interrupt is accepted, “address stack register”, “program counter”, and “interrupt stack”.
each interrupt, “interrupt enable flag (IPxxx)“ that enables each interrupt, and “vector address generator (VAG)“ that
specifies each vector address when an interrupt is accepted.
66
Serial
interface
Basic
timer 1
INT pin
Figure 11-1 shows the outline of the interrupt block.
As shown in this figure, the interrupt block temporarily stops the program under execution, and branches to an
The interrupt block consists of “interrupt control blocks” that control interrupt requests output from the corresponding
The “interrupt control block” of each peripheral hardware consists of an “interrupt request flag (IRQxxx)“ that detects
The following peripheral hardware have the interrupt functions:
• INT pin
• Basic timer 1
• Serial interface
IRQBTM1 flag
IPBTM1 flag
IRQSIO flag
IPSIO flag
IRQ flag
IP flag
Interrupt control block
Vector address
generator 02H
Vector address
Vector address
generator 01H
generator 03H
Figure 11-1. Outline of Interrupt Block
DI, EI instruction
Stack pointer
Interrupt enable
flip-flop
Program counter
Address stack
register
Interrupt stack
Bank register
PD17072,17073

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