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R8C25 Datasheet(PDF) 9 Page - Renesas Technology Corp

Part # R8C25
Description  RENESAS 16-BIT SINGLE-CHIP MCU R8C FAMILY / R8C/2x SERIES
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R8C25 Datasheet(HTML) 9 Page - Renesas Technology Corp

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6.1.1
Monitoring Vdet0 ............................................................................................................................... 40
6.1.2
Monitoring Vdet1 ............................................................................................................................... 40
6.1.3
Monitoring Vdet2 ............................................................................................................................... 40
6.2
Voltage Monitor 0 Reset ......................................................................................................................... 41
6.3
Voltage Monitor 1 Interrupt and Voltage Monitor 1 Reset ..................................................................... 42
6.4
Voltage Monitor 2 Interrupt and Voltage Monitor 2 Reset ..................................................................... 44
7.
Programmable I/O Ports ............................................................................................................... 46
7.1
Functions of Programmable I/O Ports ..................................................................................................... 46
7.2
Effect on Peripheral Functions ................................................................................................................ 47
7.3
Pins Other than Programmable I/O Ports ................................................................................................ 47
7.4
Port settings ............................................................................................................................................. 59
7.5
Unassigned Pin Handling ........................................................................................................................ 70
8.
Processor Mode ............................................................................................................................ 71
8.1
Processor Modes ...................................................................................................................................... 71
9.
Bus ................................................................................................................................................ 72
10.
Clock Generation Circuit ............................................................................................................... 73
10.1
XIN Clock ............................................................................................................................................... 82
10.2
On-Chip Oscillator Clocks ...................................................................................................................... 83
10.2.1
Low-Speed On-Chip Oscillator Clock ................................................................................................ 83
10.2.2
High-Speed On-Chip Oscillator Clock ............................................................................................... 83
10.3
XCIN Clock ............................................................................................................................................. 84
10.4
CPU Clock and Peripheral Function Clock ............................................................................................. 85
10.4.1
System Clock ...................................................................................................................................... 85
10.4.2
CPU Clock .......................................................................................................................................... 85
10.4.3
Peripheral Function Clock (f1, f2, f4, f8, and f32) ............................................................................. 85
10.4.4
fOCO ................................................................................................................................................... 85
10.4.5
fOCO40M ........................................................................................................................................... 85
10.4.6
fOCO-F ............................................................................................................................................... 85
10.4.7
fOCO-S ............................................................................................................................................... 85
10.4.8
fOCO128 ............................................................................................................................................. 85
10.4.9
fC4 and fC32 ....................................................................................................................................... 86
10.5
Power Control .......................................................................................................................................... 87
10.5.1
Standard Operating Mode ................................................................................................................... 87
10.5.2
Wait Mode .......................................................................................................................................... 89
10.5.3
Stop Mode ........................................................................................................................................... 93
10.6
Oscillation Stop Detection Function ....................................................................................................... 96
10.6.1
How to Use Oscillation Stop Detection Function ............................................................................... 96
10.7
Notes on Clock Generation Circuit ......................................................................................................... 99
10.7.1
Stop Mode ........................................................................................................................................... 99
10.7.2
Wait Mode .......................................................................................................................................... 99
10.7.3
Oscillation Stop Detection Function ................................................................................................... 99
10.7.4
Oscillation Circuit Constants .............................................................................................................. 99


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