Specifications

II-54 EPSON S1C6S2N7 TECHNICAL SOFTWARE

CHAPTER 3: PERIPHERAL CIRCUITS (Interrupt and Halt)

• Interrupt factor flags

This flag is set when any of the K00 to K03 input interrupts

occurs. The interrupt factor flag (IK0) is set to "1" when the

contents of the input (K00–K03) become "1" and the data of

the corresponding interrupt mask register (EIK00–EIK03) is

"1".

The contents of the IK0 flag can be loaded by software to

determine whether the K00–K03 input interrupts have

occured.

The flag is reset when loaded by software. (See Figure

3.10.1.)

IK0

Fig. 3.10.1

K00–K03

Input interrupt circuit

Address 0E8H

Input interrupt mask register

(EIK00–EIK03)

Input interrupt factor

flag register (IK0)

INT

(Interrupt request)

Interrupt flag (I)

K03

K02

K01

K00

Address 0E0H

Data bus