r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 131

• 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 9.5
Table 9.7
Oscillation stop detection
((a) or (b))
Watchdog timer
Voltage monitor 1
Voltage monitor 2
Preliminary document
Specifications in this document are tentative and subject to change.
How to Determine Interrupt Source for Oscillation Stop Detection Interrupt,
Watchdog Timer Interrupt, Voltage Monitor 1 Interrupt, or Voltage Monitor Interrupt
Procedure for Switching from Low-Speed On-Chip Oscillator to XIN Clock
Item
OCD0, OCD1, OCD3: Bits in OCD register
CM40 to CM42: Bits in CM4 register
NO
(a) OCD3 bit in OCD register = 1
(b) OCD1 bit in OCD register = 1 and OCD2 bit = 1
UFIF bit in RISR register = 1
VW1C2 bit in VW1C register = 1
VW2C2 bit in VW2C register = 1
Set bits OCD1 and OCD0 to 00b
Set bits CM42 to CM40 to 000b
whether OCD3 bit is set to 0
Switching to XIN clock
(XIN clock oscillates)
Check several times
(XIN clock selected)
End
YES
Specification
9. Clock Generation Circuit
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