Epson E0C6001 Technical Manual page 123

E0C6001 TECHNICAL SOFTWARE
Timer interrupt
factor flag (IT)
Fig. 3.8.2
Timer interrupt circuit
II-42
This flag is set to "1" when a falling edge is detected in the
IT32
timer TM1 (32 Hz) signal.
The contents of the IT32 flag can be loaded by software to
determine whether a 32 Hz timer interrupt has occured.
The flag is reset, when it is loaded by software. (See Figure
3.8.2.)
IT8 This flag is set to "1" when a falling edge is detected in the
timer TM1 (8 Hz) signal.
The contents of the IT8 flag can be loaded by software to
determine whether an 8 Hz timer interrupt has occured.
The flag is reset, when it is loaded by software. (See Figure
3.8.2.)
IT2 This flag is set to "1" when a falling edge is detected in the
timer TM1 (2 Hz) signal.
The contents of the IT2 flag can be loaded by software to
determine whether a 2 Hz timer interrupt has occured.
The flag is reset, when it is loaded by software. (See Figure
3.8.2.)
32 Hz
D0
8 Hz
D1
2 Hz
D2
Address 0EFH
Timer interrupt
mask register (EIT)
D0
D1
D2
Address 0EBH
INT
(Interrupt request)
Interrupt flag (I)