UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 663

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

(3) Release by RESET input
Maskable
interrupt request
(excluding macro
service request)
Macro service
request
Release Source
* 1. Interrupt mask bit in individual interrupt request source
2. Interrupt enable flag in program status word (PSW)
3. Pending interrupt requests are acknowledged when acknowledgment becomes possible.
4. Bit in interrupt mode control register (IMC)
5. Bit in macro service mode register of macro service control word in individual macro service request source
The program is executed after branching to the reset vector address, as in a normal reset operation. However, internal
RAM contents retain their value directly before HALT mode was set.
MK
0
0
1
0
1
*1
Table 22-3 HALT Mode Release by Maskable Interrupt Request
IE
1
0
*2
• Interrupt service program not being executed
• Low-priority maskable interrupt service
• PRSL bit
• Same-priority maskable interrupt service
• High-priority interrupt service program
program being executed
priority level 3 interrupt service program
program being executed
(If PRSL bit
execution of priority level 3 interrupt
service program)
being executed
CHAPTER 22 STANDBY FUNCTION
*4
cleared (0) during execution of
State on Release
*4
is cleared (0), excluding
—
—
—
—
Interrupt request acknowledgment
Execution of instruction after
MOV STBC, #byte instruction (interrupt
request that releasedHALT mode is held
pending
HALT mode retained
Macro service processing execution
HALT mode retained
End condition not established
mode again
End condition established
If VCIE
If VCIE
maskable interrupt request
*3
Operation after Release
)
*5
*5
= 1: HALT mode again
= 0: Same as release by
HALT
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