upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 689

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

Cautions: 1. NMI signal must not input during NMI servicing. The CPU always accepts the NMI
Non-maskable
interrupt being
NMI
INTWDT2
servicing
(b) Non-maskable interrupt request generated during non-maskable interrupt servicing
Figure 17-1: Non-Maskable Interrupt Request Acknowledgement Operation (2/2)
• NMI request generated during NMI servicing
• NMI request generated during INTWDT2 servicing
INTWDT2
request
2. In NMI routine, Software must not operate the PSW: NP_bit. If the NP bit is cleared
NMI
request
Main routine
Main routine
pin input, even if NP bit is set.
by software, the CPU is able to accept the INTWDT2 interrupt and NMI pin input.
Non-maskable interrupt request signal generated during non-maskable interrupt servicing
Chapter 17 Interrupt/Exception Processing Function
NMI
request
NMI
request
User’s Manual U16702EE3V2UD00
NMI
NMI
servicing
INTWDT2
servicing
System reset
System reset
NMI
servicing
NMI
servicing
• INTWDT2 request generated during NMI servicing
• INTWDT2 request generated during INTWDT2 servicing
(NP = 1 retained before INTWDT2 request)
(NP = 1 retained before INTWDT2 request)
INTWDT2
request
NMI
request
Main routine
Main routine
INTWDT2
INTWDT2
request
INTWDT2
request
System reset
System reset
NMI
servicing
INTWDT2
servicing
(Invalid)
(Invalid)
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