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R8C/15 датащи(PDF) 66 Page - Renesas Technology Corp

номер детали R8C/15
подробное описание детали  16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / R8C/Tiny SERIES
PDF  277 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R8C/15 датащи(HTML) 66 Page - Renesas Technology Corp

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R8C/14 Group, R8C/15 Group
9. Clock Generation Circuit
Rev.2.10
Jan 19, 2006
Page 54 of 253
REJ09B0164-0210
Figure 9.9
Procedure of Switching Clock Source From Low-Speed On-Chip Oscillator to Main
Clock
Table 9.6
Determine Interrupt Factor of Oscillation Stop Detection, Watchdog Timer and
Voltage Monitor 2 Interrupts
Generated Interrupt Cause
Bit Showing Interrupt Cause
Oscillation Stop Detection
( (a) or (b) )
(a) OCD3 bit in OCD register = 1
(b) OCD1 to OCD0 bits in OCD register = 11b and the OCD2 bit = 1
Watchdog Timer
VW2C3 bit in VW2C register = 1
Voltage Monitor 2
VW2C2 bit in VW2C register = 1
Determine OCD3 Bit
1(Main Clock Stop)
0(Main Clock oscillate)
Set OCD1 to OCD0 bits to “00b”
(oscillation stop detection function
disabled)
Set OCD2 bit to “0”
(select Main Clock)
End
Switch to Main clock
OCD3 to OCD0 bits: Bits in OCD register
Judge several times
Determine several times that the main clock is supplied



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