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NEC PD17062 Manuale Utente

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PD17062
IEGNC or IEGVSYN flag change
INT
NC
 or V
SYNC
 pin
Whether interrupt
IRQNC flag
request is issued
1        
→
        0
Low
Not issued
No change
(Fall)
(Rise)
High
Issued
Set
1        
→
        0
Low
Issued
Set
(Rise)
(Fall)
High
Not issued
No change
Table 11-3   Interrupt Request Issuance by IEGNC Flag Change
11.8   INTERNAL INTERRUPT (TIMER, SERIAL INTERFACE)
There are two types of internal interrupts:  the timer interrupt and the serial interface interrupt.
11.8.1   Timer Interrupt
The timer interrupt function can issue interrupt requests at a specified time interval.
An interval of 100 ms, 20 ms, or 5 ms can be selected.
See Chapter 12 for details.
11.8.2   Serial Interface Interrupt
The serial interface interrupt function can issue an interrupt request when a serial out or serial in operation
terminates.
Therefore, interrupt requests are mainly issued by the serial clock.
See Chapter 16 for details.