upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 445

• Manufacturer Part Number: upd78f0148m1gka1-9eu
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(2) HALT mode release
The HALT mode can be released by the following two sources.
(a) Release by unmasked interrupt request
internal oscillation clock,
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
or subsystem clock
X1 input clock,
Status of CPU
release signal
2. The wait time is as follows:
Standby
mode is acknowledged.
• When vectored interrupt servicing is carried out: 8 or 9 clocks
• When vectored interrupt servicing is not carried out: 2 or 3 clocks
Figure 21-3. HALT Mode Release by Interrupt Request Generation
Operating mode
CHAPTER 21 STANDBY FUNCTION
instruction
HALT
User’s Manual U15947EJ3V1UD
HALT mode
Interrupt
request
Oscillation
Wait
Wait
Operating mode
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