upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 414

• Manufacturer Part Number: upd78f0730
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

(2) HALT mode release
414
internal high-speed oscillation clock
The HALT mode can be released by the following two sources.
(a) Release by unmasked interrupt request
When an unmasked interrupt request is generated, the HALT mode is released. If interrupt
acknowledgement is enabled, vectored interrupt servicing is carried out. If interrupt acknowledgement is
disabled, the next address instruction is executed.
Remarks 1. The broken lines indicate the case when the interrupt request which has released the standby
High-speed system clock or
2. The wait time is as follows:
Status of CPU
release signal
mode is acknowledged.
• When vectored interrupt servicing is carried out:
• When vectored interrupt servicing is not carried out: 2 or 3 clocks
Figure 14-3. HALT Mode Release by Interrupt Request Generation
Standby
Operating mode
CHAPTER 14 STANDBY FUNCTION
Preliminary User’s Manual U19014EJ1V0UD
instruction
HALT
HALT mode
Interrupt
request
Oscillation
8 or 9 clocks
Wait
Wait
Operating mode