UPD78F0078GK-9ET-A Renesas Electronics America, UPD78F0078GK-9ET-A Datasheet - Page 432

• Manufacturer Part Number: UPD78F0078GK-9ET-A
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0078GK-9ET-A

• Lead Free Status / Rohs Status: Supplier Unconfirmed

(2) HALT mode release
430
The HALT mode can be released by the following three sources.
(a) Release by unmasked interrupt request
(b) Release by non-maskable interrupt request
When an unmasked interrupt request is generated, the HALT mode is released. If interrupt acknowledgment
is enabled, vectored interrupt servicing is carried out. If interrupt acknowledgment is disabled, the instruction
at the next address is executed.
Remarks 1. The broken lines indicate the case when the interrupt request that released the standby mode
When a non-maskable interrupt request is generated, the HALT mode is released and vectored interrupt
servicing is carried out whether interrupt acknowledgment is enabled or disabled.
However, a non-maskable interrupt request is not generated during operation with the subsystem clock.
Standby release
CPU status
2. The wait times are as follows:
signal
Clock
Figure 21-2. HALT Mode Release by Interrupt Request Generation
• When vectored interrupt servicing is carried out:
• When vectored interrupt servicing is not carried out: 2 or 3 clocks
is acknowledged.
Operation mode
HALT instruction
CHAPTER 21 STANDBY FUNCTION
User’s Manual U14260EJ4V0UD
HALT mode
Interrupt request
Oscillation
Wait
Wait
8 or 9 clocks
Operation mode