r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 171
r5f21346mnfp
Manufacturer Part Number
r5f21346mnfp
Description
Single-chip Mcus Incorporates The R8c Cpu Core
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R5F21346MNFP.pdf
(776 pages)
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R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
Figure 9.9
Table 9.7
Oscillation stop detection
((a) or (b))
Watchdog timer
Voltage monitor 1
Voltage monitor 2
Generated Interrupt Source
Voltage Monitor 1, or Voltage Monitor 2 Interrupt
Stop is Detected
Determination of Interrupt Sources for Oscillation Stop Detection, Watchdog Timer,
Procedure for Switching to XIN Clock when XIN Clock Re-Oscillates after Oscillation
NO
(a) OCD3 bit in OCD register = 1
(b) OCD1 to OCD0 bits in OCD register = 11b and OCD2 bit = 1
VW2C3 bit in VW2C register = 1
VW1C2 bit in VW1C register = 1
VW2C2 bit in VW2C register = 1
Set bits OCD1 to OCD0 to 00b
whether OCD3 bit is set to 0
(XIN clock oscillates)
Check several times
(XIN clock selected)
Switch to XIN clock
Set OCD2 bit to 0
End
YES
Bit Indicating Interrupt Source
OCD3 to OCD0: Bits in OCD register
9. Clock Generation Circuit
Page 139 of 740
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