NEC 78K0S/KA1+ User Manual page 218

(1) Interrupt request flag registers (IF0, IF1)
An interrupt request flag is set to 1 when the corresponding interrupt request is issued, or when the
instruction is executed.
acknowledged or when a reset signal is input.
IF0 and IF1 are set with a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears IF0 and IF1 to 00H.
Figure 12-2. Format of Interrupt Request Flag Registers (IF0, IF1)
Address: FFE0H After reset: 00H
Symbol <7> <6>
IF0 ADIF TMIF010
Address: FFE1H After reset: 00H
Symbol 7 <6>
IF1 0 STIF6
××IF×
0 No interrupt request signal has been issued.
1 An interrupt request signal has been issued; an interrupt request status.
Caution Because P30, P31, P41, and P43 have an alternate function as external interrupt inputs,
when the output level is changed by specifying the output mode of the port function, an
interrupt request flag is set. Therefore, the interrupt mask flag should be set to 1 before
using the output mode.
218
CHAPTER 12 INTERRUPT FUNCTIONS
It is cleared to 0 by executing an instruction when the interrupt request is
R/W
<5> <4> <3>
TMIF000 TMIFH1 PIF1
R/W
<5> <4> <3>
SRIF6 SREIF6 TMIF80
User's Manual U16898EJ3V0UD
<2> <1>
PIF0 LVIIF
<2> <1>
PIF3 PIF2
Interrupt request flag
0
0
0
0