Halt Mode Clear Upon Interrupt Generation - NEC PD78081(A) User Manual

(2) HALT mode clear
The HALT mode can be cleared with the following three types of sources.
(a) Clear upon unmasked interrupt request
An unmasked interrupt request is used to clear the HALT mode. If interrupt acknowledge is enabled,
vectored interrupt service is carried out. If disabled, the next address instruction is executed.
Standby
Release Signal
Operating
Mode
Clock
Remarks 1. The broken line indicates the case when the interrupt request which has cleared the standby
2. Wait time will be as follows:
(b) Clear upon non-maskable interrupt request
The HALT mode is cleared and vectored interrupt service is carried out whether interrupt acknowledge
is enabled or disabled.
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CHAPTER 13 STANDBY FUNCTION
Figure 13-2. HALT Mode Clear upon Interrupt Generation
HALT
Instruction
HALT Mode
status is acknowledged.
• When vectored interrupt service is carried out:
• When vectored interrupt service is not carried out: 2 to 3 clocks
Wait
Wait
Oscillation
Operating Mode
8 to 9 clocks