Specifications

II-74 EPSON S1C62N82 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) and the input comparison
register (KCP00–KCP03) do not match 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
3.12.1.)
IK0
D0
D1
D2
D3
Address 0E5H
D0
D1
D2
D3
Address 0E8H
Input interrupt mask register
(EIK00–EIK03)
Input interrupt factor
flag register (IK0)
INT
(Interrupt request)
Interrupt flag (I)
FF
K03
K02
K01
K00
Input comparison
register (KCP00–KCP03)
Address 0E0H
Data bus
Data bus
Fig. 3.12.1
K00–K03
input interrupt circuit