M16C/65 Group Application Note Determining Commercial Power
Contents
1. 4 5 Functions Table 4 7 lists the Functions Table 4 7 Functions main Main processing mcu_init CPU initialization peripheral_init Peripheral function initialization RO1ANO806EJ0100 Rev 1 00 2tENESAS Page 7 of 11 Nov 30 2011 M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups 4 6 Function Specifications The following tables list the sample code function specifications Outline CPU initialization Determining Commercial Power Frequency Header None Declaration void mcu_init void Description Set the PLL clock divided by 2 and multiplied by 8 as the CPU clock Argument None Returned value None Remark peripheral_init Outline Peripheral function initialization Header None Declaration void peripheral_init void Description e Timer AO Set to event counter mode e Timer A1 Set to timer mode Argument None Returned value None Remark RO1ANO806EJ0100 Rev 1 00 Nov 30 2011 2tENESAS Page 8 of 11 M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups Determining Commercial Power Frequency 4 7 Flowcharts 4 7 1 Main Processing Figure 4 2 shows the Main Processing Disabled maskable interrupt flag lt 0 arr Deg A Set the PLL clock divided by 2 and multiplied by 8 as the CPU clock Se Timer AO Event counter mode peripheral_init2. count external signals that are input to the TAOIN pin Timer A1 Timer mode measure 1 second Initialize timers AO and A1 Initialize timers AO and A1 i elles umers Wand Initialize variables used Start counting timers AO and A1 Measure commercial power Count the rising edges of zero crossing signals that are input to the TAOIN pin frequency for 1 second Stop counting timers AO and A1 Timer AO overflowed Read the timer AO register value cnt_result lt TAO register 45 lt counter value lt 54 55 lt counter value lt 64 Determined to be an error Frequency is 50 Hz Frequency is 60 Hz Determined to be an error Figure 4 2 Main Processing RO1ANO806EJ0100 Rev 1 00 2tENESAS Page 9 of 11 Nov 30 2011 M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups Determining Commercial Power Frequency 4 7 2 Peripheral Function Initialization Figure 4 3 shows the Peripheral Function Initialization C peripheral_init D Set timer AO TAOMR register lt 09h Bits TMOD1 and TMODO 01b Event counter mode MRO bit 0 Pulse is not output MR1 bit 1 Count rising edges of external signals TCKO bit 0 Reload type ONSF register Bits TAOTGL and TAOTGH lt 00b Input on TAOIN pin selected UDF register TAOUD bit lt 1 Increment TAO register lt 0000h Clear the interrupt request bit TAOIC register lt 00h for timer AO Bits ILVL2 to ILVLO 000b Level 0 int
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4. has stabilized When the clock signal is generated with an external resonator or from an external oscillator during a reset ensure that the reset line is only released after full stabilization of the clock signal Moreover when switching to a clock signal produced with an external resonator or by an external oscillator while program execution is in progress wait until the target clock signal is stable Differences between Products Before changing from one product to another i e to one with a different part number confirm that the change will not lead to problems The characteristics of MPU MCU in the same group but having different part numbers may differ because of the differences in internal memory capacity and layout pattern When changing to products of different part numbers implement a system evaluation test for each of the products Notice 1 All information included in this document is current as of the date this document is issued Such information however is subject to change without any prior notice Before purchasing or using any Renesas Electronics products listed herein please confirm the latest product information with a Renesas Electronics sales office Also please pay regular and careful attention to additional and different information to be disclosed by Renesas Electronics such as that disclosed through our website 2 Renesas Electronics does not assume any liability for infringement of patents c
5. 2tEN ESAS APPLICATION NOTE M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 RO1ANO806EJ0100 5M and 57 Groups Rev 1 00 Determining Commercial Power Frequency Noy 30 2011 Abstract This document describes how to determine a 50 Hz or 60 Hz commercial power frequency using timer A event counter mode with the M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups Products M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups When using this application note with other Renesas MCUs careful evaluation is recommended after making modifications to comply with the alternate MCU R01AN0806EJ0100 Rev 1 00 2tENESAS Page 1 of 11 Nov 30 2011 M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups Determining Commercial Power Frequency Contents E ee ee 3 2 Operation Confirmation Conditions EEN 4 e Direk 4 3 1 PIN Used EE 4 4 TIN LS lA isaac atest teeta wa ca EEA E O 5 4 1 E leie de 6 4 2 Required Memory Size o ececccescceceeeeceeesceeceaeeeeenaeeceaeeeeeeaeeceaaeessenaeesaeeesaaesecaeesseaaeeseeeeeesaaeseeneeesaas 7 4 3 EST H 4 4 VIe 7 4 5 Sie de INTE 7 4 6 Wiele ee 8 4 7 lee 9 4 7 1 Main PrOCESSIAG EE 9 4 7 2 Peripheral Function InitialiZation ssiri naaa EANNA RAAE ANNEER 10 5 Sample Code ee 11 6 Reference DOCUINGING dE EES EEN 11 RO1ANO806EJ0100 Rev 1 00 2tENESAS Page 2 of 11 Nov 30 2011 M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups Determi
6. 3 Lujiazui Ring Rd Pudong District Shanghai 200120 China Tel 86 21 5877 1818 Fax 86 21 6887 7858 7898 Renesas Electronics Hong Kong Limited Unit 1601 1613 16 F Tower 2 Grand Century Place 193 Prince Edward Road West Mongkok Kowloon Hong Kong Tel 852 2886 9318 Fax 852 2886 9022 9044 Renesas Electronics Taiwan Co Ltd 13F No 363 Fu Shing North Road Taipei Taiwan Tel 886 2 8175 9600 Fax 886 2 8175 9670 Renesas Electronics Singapore Pte Ltd 1 harbourFront Avenue 06 10 keppel Bay Tower Singapore 098632 Tel 65 6213 0200 Fax 65 6278 8001 Renesas Electronics Malaysia Sdn Bhd Unit 906 Block B Menara Amcorp Amcorp Trade Centre No 18 Jin Persiaran Barat 46050 Petaling Jaya Selangor Darul Ehsan Malaysia Tel 60 3 7955 9390 Fax 60 3 7955 9510 Renesas Electronics Korea Co Ltd 11F Samik Lavied or Bldg 720 2 Yeoksam Dong Kangnam Ku Seoul 135 080 Korea Tel 82 2 558 3737 Fax 82 2 558 5141 2011 Renesas Electronics Corporation All rights reserved Colophon 1 1
7. ck a Initialize timers AO and A1 Start counting timers AO and A1 Count rising edges of zero crossing signals for 1 second Determine commercial power frequency Figure 4 1 Operation Outline RO1ANO806EJ0100 Rev 1 00 2tENESAS Page 6 of 11 Nov 30 2011 M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups Determining Commercial Power Frequency 4 2 Required Memory Size Table 4 4 lists the Required Memory Size Table 4 4 Required Memory Size Memory Used Size Remarks ROM 239 bytes In the rO1an0806_src c module RAM 4 bytes In the rO1an0806_src c module Maximum user stack usage 10 bytes Maximum interrupt stack usage 18 bytes The required memory size varies depending on the C compiler version and compile options 4 3 Constants Table 4 5 lists the Constants Used in the Sample Code Table 4 5 Constants Used in the Sample Code Constant Name Setting Value TA1_1S TA1_100MS HZ JDG ERR HZ _JDG_50 HZ _JDG_60 Contents For measuring 1 second Timer A1 register setting value The determination is an error The determination is 50 Hz The determination is 60 Hz 4 4 Variables Table 4 6 lists the Global Variables Table 4 6 Global Variables Variable Name Contents Function Used unsigned char cnt_ta1_100ms 100 ms counter unsigned short cnt_result Store the timer AO register value unsigned char hz_jdg Store the determination result
8. d Determination Less than or equal to 44 More than or equal to 45 and less than or equal to 54 More than or equal to 55 and less than or equal to 64 More than or equal to 65 Setting conditions for timers AO and A1 are listed below Table 4 2 Timer AO Setting Conditions Operation mode Setting Event counter mode Count source External signal that is input to the TAOIN pin rising edges Count operation Increment TAOIN pin function Table 4 3 Timer A1 Setting Conditions Operation mode Count source input Setting Timer mode Count source f64TIMAB Count operation Decrement RO1ANO806EJ0100 Rev 1 00 Nov 30 2011 2tENESAS Page 5 of 11 M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups Determining Commercial Power Frequency 4 1 Operation Outline 1 Initialize the CPU Set the PLL clock divided by 2 and multiplied by 8 as the CPU clock 2 Initialize timers AO and A1 Set timer AO to event counter mode and timer A1 to timer mode 3 Start counting timers AO and A1 4 Count rising edges of zero crossing signals for 1 second Measure 1 second with timer A1 and count the rising edges of input zero crossing signals for 1 second with timer AO 5 Determine commercial power frequency Determine commercial power frequency using the timer AO register value Figure 4 1 shows the Operation Outline Initialize the CPU clo
9. en consent of Renesas Electronics 12 Please contact a Renesas Electronics sales office if you have any questions regarding the information contained in this document or Renesas Electronics products or if you have any other inquiries Note 1 Renesas Electronics as used in this document means Renesas Electronics Corporation and also includes its majority owned subsidiaries Note 2 Renesas Electronics product s means any product developed or manufactured by or for Renesas Electronics 2eENESAS SALES OFFICES Renesas Electronics Corporation http www renesas com Refer to http www renesas com for the latest and detailed information Renesas Electronics America Inc 2880 Scott Boulevard Santa Clara CA 95050 2554 U S A Tel 1 408 588 6000 Fax 1 408 588 6130 Renesas Electronics Canada Limited 1101 Nicholson Road Newmarket Ontario L3Y 9C3 Canada Tel 1 905 898 5441 Fax 1 905 898 3220 Renesas Electronics Europe Limited Dukes Meadow Millboard Road Bourne End Buckinghamshire SL8 5FH U K Tel 44 1628 585 100 Fax 44 1628 585 900 Renesas Electronics Europe GmbH Arcadiastrasse 10 40472 D sseldorf Germany Tel 49 211 65030 Fax 49 211 6503 1327 Renesas Electronics China Co Ltd 7th Floor Quantum Plaza No 27 ZhiChunLu Haidian District Beijing 100083 P R China Tel 86 10 8235 1155 Fax 86 10 8235 7679 Renesas Electronics Shanghai Co Ltd Unit 204 205 AZIA Center No 123
10. errupt disabled IR bit lt 0 Interrupt not requested Set timer A1 TA1MR register lt 00h Bits TMOD1 and TMODO 00b Timer mode MRO bit 0 Pulse is not output TACSO register lt BOh Bits TCS6 to TCS4 011b f64TIMAB TCS7 bit 1 TCKO TCK1 disabled TCS4 to TCS6 enabled TA1 register lt 50000 1 Clear the interrupt request bit TAIIC register lt 00h for timer A1 Bits ILVL2 to ILVLO 000b Level 0 interrupt disabled IR bit lt 0 Interrupt not requested Figure 4 3 Peripheral Function Initialization RO1ANO806EJ0100 Rev 1 00 2tENESAS Page 10 of 11 Nov 30 2011 M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups Determining Commercial Power Frequency 5 Sample Code Sample code can be downloaded from the Renesas Electronics website 6 Reference Documents M16C 63 Group User s Manual Hardware Rev 2 00 M16C 64A Group User s Manual Hardware Rev 2 00 M16C 64C Group User s Manual Hardware Rev 1 00 M16C 65 Group User s Manual Hardware Rev 2 00 M16C 65C Group User s Manual Hardware Rev 1 00 M16C 6C Group User s Manual Hardware Rev 2 00 M16C 5L Group M16C 56 Group User s Manual Hardware Rev 1 10 M16C 5LD Group M16C 56D Group User s Manual Hardware Rev 1 10 M16C 5M Group M16C 57 Group User s Manual Hardware Rev 1 10 The latest versions can be downloaded from the Renesas Electronics website Technical Update Technical News The latest infor
11. he conditions below Table 2 1 Operation Confirmation Conditions Item Contents MCU used M16C 65 Group Operating frequencies e XIN Clock 8 MHz e CPU clock 32 MHz PLL operation mode divided by 2 multiplied by 8 Operating voltage 5 V available between 2 7 to 5 5 V Integrated development environment Renesas Electronics Corporation High performance Embedded Workshop Version 4 09 C compiler Renesas Electronics Corporation M16C Series R8C Family C Compiler V 5 45 Release 01 Compile options c finfo dir CONFIGDIR The default setting is used in the integrated development environment Operating mode Single chip mode Sample code version 3 Hardware 3 1 Pin Used Version 1 00 Table 3 1 lists the Pin Used and Its Function Table 3 1 Pin Used and Its Function 70 P7_1 TAOIN Inputs zero crossing signals from the zero crossing detector RO1ANO806EJ0100 Rev 1 00 Nov 30 2011 2tENESAS Page 4 of 11 M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups 4 Software Determining Commercial Power Frequency Timer AO event counter mode and timer A1 timer mode are used in the sample code Count the rising edges of zero crossing signals for 1 second and determine whether commercial power frequency is 50 Hz or 60 Hz according to Table 4 1 Table 4 1 Frequencies and Determinations in the Sample Code Number of Edges Counted for 1 Secon
12. mation can be downloaded from the Renesas Electronics website C Compiler Manual M16C Series R8C Series C Compiler Package V 5 45 C Compiler User s Manual Rev 2 00 The latest version can be downloaded from the Renesas Electronics website Website and Support Renesas Electronics website http www renesas com Inquiries http www renesas com inquiry RO1ANO806EJ0100 Rev 1 00 ztENESAS Page 11 of 11 Nov 30 2011 Revision Histor M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups y Determining Commercial Power Frequency Description Rev Date Summary Nov 30 2011 o First edition issued All trademarks and registered trademarks are the property of their respective owners General Precautions in the Handling of MPU MCU Products The following usage notes are applicable to all MPU MCU products from Renesas For detailed usage notes on the products covered by this manual refer to the relevant sections of the manual If the descriptions under General Precautions in the Handling of MPU MCU Products and in the body of the manual differ from each other the description in the body of the manual takes precedence 1 Handling of Unused Pins Handle unused pins in accord with the directions given under Handling of Unused Pins in the manual The input pins of CMOS products are generally in the high impedance state In operation with an unused pin in the open circuit state extra electromagnetic
13. ning Commercial Power Frequency 1 Specifications A zero crossing signal is output using a zero crossing detector from an AC power input voltage The output zero crossing signal is input to the TAOIN pin and its rising edge is counted Rising edges are counted for 1 second then a 50 Hz or 60 Hz commercial power frequency is determined Timer AO event counter mode is used to count the number of rising edges Table 1 1 lists the Peripheral Functions and Their Applications Figure 1 1 shows the Connection Example and Figure 1 2 shows Detecting Zero Crossing of AC Power Voltage Table 1 1 Peripheral Functions and Their Applications Peripheral Function Application Counts rising edges of zero crossing signals using Timar dimer A0 event counter mode Timer timer A1 Measures time to operate timer AO 1 second M16C 65 Group Zero crossing signal Zero crossing detector Figure 1 1 Connection Example AC power input voltage Zero crossing signal detector Zero crossing signal l TAOIN pin Count rising edges using timer AO event counter mode 1 second Figure 1 2 Detecting Zero Crossing of AC Power Voltage RO1ANO806EJ0100 Rev 1 00 2tENESAS Page 3 of 11 Nov 30 2011 M16C 63 64A 64C 65 65C 6C 5LD 56D 5L 56 5M and 57 Groups Determining Commercial Power Frequency 2 Operation Confirmation Conditions The sample code accompanying this application note has been run and confirmed under t
14. noise is induced in the vicinity of LSI an associated shoot through current flows internally and malfunctions occur due to the false recognition of the pin state as an input signal become possible Unused pins should be handled as described under Handling of Unused Pins in the manual Processing at Power on The state of the product is undefined at the moment when power is supplied The states of internal circuits in the LSI are indeterminate and the states of register settings and pins are undefined at the moment when power is supplied In a finished product where the reset signal is applied to the external reset pin the states of pins are not guaranteed from the moment when power is supplied until the reset process is completed In a similar way the states of pins in a product that is reset by an on chip power on reset function are not guaranteed from the moment when power is supplied until the power reaches the level at which resetting has been specified Prohibition of Access to Reserved Addresses Access to reserved addresses is prohibited The reserved addresses are provided for the possible future expansion of functions Do not access these addresses the correct operation of LSI is not guaranteed if they are accessed Clock Signals After applying a reset only release the reset line after the operating clock signal has become stable When switching the clock signal during program execution wait until the target clock signal
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