6 INITERRUPT CONTROLLER
42
EPSON
S1C17001 TECHNICAL MANUAL
D[7:0]
EIFT[7:0]: Interrupt Flags (for Level Trigger)
These are interrupt flags indicating the interrupt factor occurrence status.
1(R):
Interrupt factor present
0(R):
No interrupt factor (default)
1(W):
Disabled
0(W):
Disabled
Refer to the description for IIFT[7:0].
Note that these interrupts must be set to level trigger mode in the ITC_ELV
x
registers (0x4306 to
0x430c). To reset the interrupt flags, rather than writing 1 to the bit, set the interrupt flag to 1 within the
peripheral module.
Table 6.7.3: Hardware interrupt factors and interrupt flags
Interrupt flag
Hardware interrupt factor
EIFT0 (D0)
P0 port interrupt: P00 to P07 port input
EIFT1 (D1)
P1 port interrupt: P10 to P17 port input
EIFT2 (D2)
Stopwatch timer interrupt: 100 Hz/10 Hz/1 Hz signal
EIFT3 (D3)
Clock timer interrupt: 32 Hz/8 Hz/2 Hz/1 Hz signal
EIFT4 (D4)
8-bit OSC1 timer interrupt: Compare match
EIFT7 (D7)
PWM & capture timer interrupt: Compare A/Compare B match
Note: The interrupt flags are not reset even if maskable interrupt requests are accepted by the
S1C17 core and branched to interrupt processing routines. Note that returning from an inter-
rupt processing routine using the
reti
command without resetting the interrupt flags using
the program will generate the same interrupt. Interrupt flags set to level trigger must be reset
by the control register within the peripheral module.
Содержание S1C17001
Страница 1: ...Technical Manual S1C17001 CMOS 16 BIT SINGLE CHIP MICROCONTROLLER ...
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