Interrupt Function - Epson S1C6S3N2 Technical Manual

CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Clock Timer)

Interrupt function

Address
070H
32 Hz interrupt request
Fig. 4.8.2
8 Hz interrupt request
Timing chart of
2 Hz interrupt request
clock timer
I-62
The clock timer can cause interrupts at the falling edge of
32 Hz, 8 Hz and 2 Hz signals. Software can set whether to
mask any of these frequencies.
Figure 4.8.2 is the timing chart of the clock timer.
Register
Frequency
D0 16 Hz
8 Hz
D1
D2 4 Hz
D3 2 Hz
As shown in Figure 4.8.2, interrupt is generated at the
falling edge of the frequencies (32 Hz, 8 Hz, 2 Hz). At this
time, the corresponding interrupt factor flag (TI32, TI8, TI2)
is set to "1". Selection of whether to mask the separate
interrupts can be made with the interrupt mask registers
(ETI32, ETI8, ETI2). However, regardless of the interrupt
mask register setting, the interrupt factor flag is set to "1" at
the falling edge of the corresponding signal.
Clock timer timing chart
EPSON
S1C6S3N2 TECHNICAL HARDWARE