R5F21133DFP RENESAS [Renesas Technology Corp], R5F21133DFP Datasheet - Page 54
R5F21133DFP
Manufacturer Part Number
R5F21133DFP
Description
16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY/R8C/Tiny SERIES
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.R5F21133DFP.pdf
(224 pages)
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Part Number:
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Renesas Electronics America
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R8C/13 Group
Rev.1.20
REJ09B0111-0120
Table 6.5 Interrupt Factor Determination of Oscillation Stop Detection, Watchdog Timer Interrupt or
Figure 6.7 Switching Clock Source From Low-speed On-Chip Oscillator to Main Clock
Oscillation stop detection
( (a) or (b) )
Watchdog timer
Voltage detection
Generated Interrupt Factor
Jan 27, 2006
Voltage Detection Interrupt
page 43 of 205
(oscillation stop detection function disabled)
Set OCD1 to OCD0 bits to 00
Determine several times
(selecting main clock)
Switch to Main clock
Set OCD2 bit to 0
Verify OCD3 bit
(a) The OCD3 bit in the OCD register = 1
(b) The OCD1 to OCD0 bits in the OCD register = 11
The D43 bit in the D4INT register = 1
The D42 bit in the D4INT register = 1
OCD2 bit = 1
End
0(main clock oscillating)
Determine several times that the main clock is supplied
Bit showing interrupt source
2
1(main clock stop)
OCD3 to OCD0 bits: Bits in OCD register
6.5 Oscillation Stop Detection Function
2
and the
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