UPD78F9418A NEC, UPD78F9418A Datasheet - Page 247

• Manufacturer Part Number: UPD78F9418A
• Description: (UPD7894xxA) 8-Bit Single Chip Microcontrollers
• Manufacturer: NEC

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(2)
Remarks 1. The broken lines indicate the case where the interrupt request that has released the standby mode
Releasing HALT mode
The HALT mode can be released by the following three types of sources:
(a)
(b)
release signal
Releasing by unmasked interrupt request
The HALT mode is released by an unmasked interrupt request. In this case, if interrupts are enabled
to be acknowledged, vectored interrupt servicing is performed.
instruction at the next address is executed.
2. The wait time is as follows:
Releasing by non-maskable interrupt request
The HALT mode is released regardless of whether interrupts are enabled or disabled, and vectored
interrupt servicing is performed.
is acknowledged.
• When vectored interrupt servicing is performed:
• When vectored interrupt servicing is not performed:
Standby
Clock
Operation
mode
Figure 16-2. Releasing HALT Mode by Interrupt
instruction
HALT
CHAPTER 16 STANDBY FUNCTION
User’s Manual U13952EJ3V0UD
HALT mode
Oscillation
Wait
Wait
9 to 10 clocks
1 to 2 clocks
Operation mode
If interrupts are disabled, the
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