r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 132

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
Figure 9.6
To oscillation stop detection
(oscillation stop detection
interrupt disabled)
Note:
Set OCD1 bit to 0
Interrupt sources
(XIN clock stops)
Determination of
interrupt routine
OCD1 to OCD3: Bits in OCD register
VW2C2, VW2C3: Bits in VW2C register
1. This disables multiple oscillation stop detection interrupts.
OCD3 = 1?
YES
Preliminary document
Specifications in this document are tentative and subject to change.
Example of How to Determine Interrupt Sources for Oscillation Stop Detection
Interrupt, Watchdog Timer Interrupt, Voltage Monitor 1 Interrupt, or Voltage Monitor 2
Interrupt
(1)
NO
interrupt enabled) and OCD2 = 1
(on-chip oscillator clock selected
(oscillation stop detection
as system clock)?
OCD1 = 1
YES
NO
(watchdog timer underflow)
To watchdog timer
interrupt routine
UFIF = 1?
YES
NO
To voltage monitor 2
interrupt routine
(Vdet2 passed)
VW2C2 = 1?
YES
9. Clock Generation Circuit
NO
To voltage monitor 1
interrupt routine
Page 101 of 725