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R5F21181SP Datasheet(PDF) 9 Page - Renesas Technology Corp

Part # R5F21181SP
Description  RENESAS 16-BIT SINGLE-CHIP MCU R8C FAMILY / R8C/1x SERIES
Download  257 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R5F21181SP Datasheet(HTML) 9 Page - Renesas Technology Corp

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4.
Special Function Registers (SFRs)
18
5.
Resets
22
5.1
Hardware Reset ........................................................................................24
5.1.1
When Power Supply is Stable ............................................................24
5.1.2
Power On............................................................................................24
5.2
Power-On Reset Function .........................................................................26
5.3
Voltage Monitor 1 Reset ...........................................................................27
5.4
Voltage Monitor 2 Reset............................................................................27
5.5
Watchdog Timer Reset..............................................................................27
5.6
Software Reset..........................................................................................27
6.
Programmable I/O Ports
28
6.1
Functions of Programmable I/O Ports .......................................................28
6.2
Effect on Peripheral Functions ..................................................................28
6.3
Pins Other than Programmable I/O Ports..................................................28
6.4
Port settings ..............................................................................................35
6.5
Unassigned Pin Handling ..........................................................................39
7.
Voltage Detection Circuit
40
7.1
VCC Input Voltage.....................................................................................46
7.1.1
Monitoring Vdet1 ................................................................................46
7.1.2
Monitoring Vdet2 ................................................................................46
7.1.3
Digital Filter.........................................................................................46
7.2
Voltage Monitor 1 Reset............................................................................48
7.3
Voltage Monitor 2 Interrupt and Voltage Monitor 2 Reset .........................49
8.
Processor Mode
51
8.1
Processor Modes ......................................................................................51
9.
Bus
52
10. Clock Generation Circuit
53
10.1
Main Clock.................................................................................................60
10.2
On-Chip Oscillator Clocks .........................................................................61
10.2.1
Low-Speed On-Chip Oscillator Clock .................................................61
10.2.2
High-Speed On-Chip Oscillator Clock ................................................61


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