M16C65 Datasheet, PDF (285/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
14. Interrupts
14.12 Non-Maskable Interrupt Source Discrimination
The watchdog timer interrupt, oscillation stop and re-oscillation detection interrupt, voltage monitor 1
interrupt, and voltage monitor 2 interrupt share the same interrupt vector. When using some functions
together, read the detect flags of the events in an interrupt processing program, and determine the
interrupt source of the interrupt request. Table 14.13 lists Bits Used for Non-Maskable Interrupt Source
Discrimination.
Table 14.13 Bits Used for Non-Maskable Interrupt Source Discrimination
Interrupt
Detect Flag
Bit Position
Watchdog timer
VW2C3 bit in the VW2C register
(watchdog timer underflow detected)
Oscillation stop and CM22 bit in the CM2 register
re-oscillation detection (oscillation stop and re-oscillation detected)
Voltage monitor 1 VW1C2 bit in the VW1C register (Vdet1 passage detected)
Voltage monitor 2 VW2C2 bit in the VW2C register (Vdet2 passage detected)
Function
0: not detected
1: detected
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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