UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 675

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(1) IDLE mode release by NMI input
(2) IDLE mode release by INTP4 or INTP5 input
IDLE mode is released when the valid edge specified by external interrupt mode register 0 (INTM0) is input to the NMI
input.
When the PD784026 is released from IDLE mode, if a non-maskable interrupt by NMI pin input can be acknowledged,
a branch is made to the NMI interrupt service program. If the interrupt cannot be acknowledged (if the IDLE mode
is set in an NMI interrupt service program, etc.), execution is resumed from the instruction following the instruction that
set the IDLE mode, and a branch is made to the NMI interrupt service program when acknowledgment becomes possible
(by execution of an RETI instruction, etc.).
See 20.6 NON-MASKABLE INTERRUPT ACKNOWLEDGMENT OPERATION for details of NMI interrupt acknowl-
edgment.
When masking of interrupts by INTP4 and INTP5 input is released and macro service is disabled, IDLE mode is released
when the valid edge specified by external interrupt mode register 1 (INTM1) is input to the INTP4 or INTP5 input.
When the PD784026 is released from IDLE mode, if an interrupt can be acknowledged when the interrupt enable flag
(IE) is set (1), a branch is made to the interrupt service program. If the interrupt cannot be acknowledged and if the
IE flag is cleared (0), execution is resumed from the instruction following the instruction that set the IDLE mode.
See 20.7 MASKABLE INTERRUPT ACKNOWLEDGMENT OPERATION for details of interrupt acknowledgment.
CHAPTER 22 STANDBY FUNCTION
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