RP5C62 RICOH Co.,Ltd., RP5C62 Datasheet
RP5C62
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REAL-TIME CLOCK RP/ RF/ RS5C62 APPLICATION MANUAL ELECTRONIC DEVICES DIVISION NO.EA-012-9803 ...
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The products and the product specifications described in this application manual are subject to change or dis- continuation of production without notice for reasons such as improvement. Therefore, before deciding to use the products, please refer to Ricoh sales ...
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RP/RF/RS5C62 APPLICATION MANUAL CONTENTS ...................................................................................................... OUTLINE .................................................................................................... FEATURES ......................................................................................... BLOCK DIAGRAM ................................................................................... PIN CONFIGURATION ........................................................................................ PIN DESCRIPTION ABSOLUTE MAXIMUM RATINGS RECOMMENDED OPERATING CONDITION DC ELECTRICAL CHARACTERISTICS AC ELECTRICAL CHARACTERISTICS ............................................................................................. TIMING CHART FUNCTIONAL DESCRIPTION ................................................................................................. 1. Addressing ................................................................................... 2. Functions ...
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QUESTIONS AND ANSWERS ON USE .............................................................................. PACKAGE DIMENSIONS TAPING SPECIFICATIONS ......................................................... ........................................................................... ...
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... Consumes very low power due to CMOS technology can be backed up by batteries. • Power supply voltage between 3.0 to 5.0V. • Time keeping supply voltage between 2.0 to 6.0V. • Package : 18pin DIP for RP5C62, 18pin SOP for RF5C62, 20pin SSOP for RS5C62. BLOCK DIAGRAM OSCIN ...
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... RP/RF/RS5C62 PIN CONFIGURATION • RP5C62 (18pin DIP VDD OSCOUT TMOUT 3 16 OSCIN INTR VSS PIN DESCRIPTION Pin No. Symbol Name 1 CS Chip select input 2 CE Chip enable input 3 TMOUT Timer output 4–7 A0 –A3 Address input 8 RD Read control input 10 WR Write control input Bi-directional data 11– ...
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ABSOLUTE MAXIMUM RATINGS Symbol Item V Supply Voltage DD V Input Voltage I Output Voltage Output Voltage 2 P Maximum Power Dissipation D Topt Operating Temperature Tstg Storage Temperature Absolute Maximum ratings are threshold limit values that ...
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RP/RF/RS5C62 DC ELECTRICAL CHARACTERISTICS Symbol Item V “H” input voltage IH1 V “L” input voltage IL1 V “H” input voltage IH2 V “L” input voltage IL2 V “H” output voltage OH1 V “L” output voltage OL1 V “L” output voltage ...
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AC ELECTRICAL CHARACTERISTICS Symbol Item t CE Setup Time CES t CE Hold Time CEH t (RD) Address Setup Time (For Read (WR) Address Setup Time (For Write (RD) Address Hold Time (For Read ...
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RP/RF/RS5C62 FUNCTIONAL DESCRIPTION 1. Addressing Address Bus Description sec. Counter sec. Counter min. Counter ...
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Functions of Registers 2.1 Control Register 1 (Bank0/1 at “Dh” WTEN ALEN TMR BANK The BANK bit is intended for only write operation and always read as “0” ...
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RP/RF/RS5C62 2.2 Control Register 2 (BANK0/1 at “Eh” CTFG ALFG * * BSY CTFG ALFG Alarm time match indication bit * Cyclic interrupt indication bit * Time/calendar counter state indication bit * 1) The BSY bit ...
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ALFG INTR Alarm time match 4) The CTFG bit is set to “1” upon output of a cyclic interrupt from the INTR pin (while it is held low cyclic interrupt may occur in the pulse mode and the ...
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RP/RF/RS5C62 2.3 Control Register 3 (BANK0/1 at “Fh” WTRST TSTA TSTB The bit marked with “ ” is not intended for write operation This bit is intended for only write ...
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Interrupt Cycle Selection Register (BANK1 at “0h” These bits are intended for only write operation and always read as “0” The ...
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RP/RF/RS5C62 2.6 Alarm Register (1-minute, 10-minute, 1-hour, and 10-hour) (BANK1 at “2h to 5h” AP ...
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24-hour time scale 12-hour time scale 12-hour time scale 24-hour time scale 00 12 (AM12 ( ( ( ( ( ( ...
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RP/RF/RS5C62 2.9 Timer Clock Selection Register (BANK1 at “Ch” Only the TM bit is intended for read operation. The D0 bit is always read as “TMFG”. ...
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Relationship between TMFG Bit and TMOUT pin output * TMOUT TMFG Setting the TMR bit to “1” 4) The timer is stopped (the TMOUT pin output is turned off) upon driving low the CE pin input, but restarted upon ...
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RP/RF/RS5C62 3.2 Day-of-the-week Counter (BANK0 at “6h” The bits marked with “ ” are always read as “0” and not intended for write operation The day-of-the-week counter is ...
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USAGE 1. Reading and Writing Operations 1.1 Reading Operation The requirements for reading data from the internal registers and counters are: [1] holding the CE pin high, [2] performing the ...
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RP/RF/RS5C62 1.2 Writing Operation The requirements for writing data to the internal registers and counters are: [1] holding the CE pin high, [2] per- forming the process of addressing through the pin inputs, then [3] driving low ...
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Configuration of Oscillatory Circuit RP/RF/RS5C62 VDD R D OSCOUT R F OSCIN In the oscillatory circuit, which is driven by a constant voltage of about 2V relative to the VDD pin, either one end of the oscillatory capacitors C ...
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RP/RF/RS5C62 4. Adjustment of Oscillation Frequencies 4.1 Measurement of Oscillation Frequency The oscillation frequency can be measured by using the INTR pin output (a cyclic interrupt). Note that its mea- surement is affected by and cannot therefore be obtained with ...
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Adjustment of Oscillation Frequencies < Unless adjustment needs to be made to oscillation frequencies: > Change ranking of oscillation frequencies NO Optimize selecting crystal oscillators, inquire of their suppliers. Check how the selected crystal oscillators match ...
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RP/RF/RS5C62 5. Interrupts Interrupts are available in the following two types: 1) Alarm interrupt: Requested upon driving low (turning on) the INTR pin in matching between preset alarm time (in minutes and hours) and time indicated by the time counter ...
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Cyclic Interrupt A desired interrupt cycle can be preset in the bits in the interrupt cycle selection register. With the preset inter- rupt cycle, the INTR pin is driven low (turned on) to output an request for a cyclic ...
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RP/RF/RS5C62 It is recommended to update the settings of the timer clock selection register at regular time intervals to improve the stability of timer operation. Elements Involved in Timer Timer clock selection register and TMFG bit TMR bit 7. Detection ...
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Typical Power Supply Circuit RP/RF/RS5C62 A INTR B OSCIN OSCOUT VDD VSS 1) Connect either one end of the oscillatory capacitors C Voltage of system power supply and C to the VDD pin Install the by-pass capacitors ...
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RP/RF/RS5C62 9. Typical Connection between RP/RF/RS5C62 and CPU RP/RF/RS5C62 and CPU Z80 Z80 A4 to A15 Address IORQ Decoder Powerdown Detector RP/RF/RS5C62 and CPU 8086 8086 Address Decoder ALE A0 to A19 ...
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Typical Characteristics A 10.1 Current Consumption vs 5pF =10pF D C =20pF D C =30pF D C =39pF (pF) D 10.3 Current Consumption vs. ...
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RP/RF/RS5C62 10.5 Oscillation Frequency vs –20 –40 –60 –80 –100 (pF) G 10.7 Oscillation Frequency vs –1 –2 –3 – 10.9 ...
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Typical Software-controlled Processes 11.1 Initialization at Power-on At power-on from 0V, the internal registers and the output pins have indefinite states and therefore require initial- ization. The process of initialization differs as exemplified below depending on whether the XSTP ...
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RP/RF/RS5C62 11.1-2 Initialization Subject to Setting of XSTP Bit Start Power-on from 0V YES XSTP=0? NO Control register 3 Control register 1 Interrupt cycle selection register BSY=0? 9 YES * Control register 2 Set 12-hour or 24-hour time scale, time ...
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Writing to or Reading from Time and Calendar Counters Writing to the time and calendar counters must be performed in the absence of a carry. In particular, correct writing to the time and calendar counters requires stopping time count ...
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RP/RF/RS5C62 11.2-2 Reading from Time and Calendar Counters by Generating Cyclic Interrupt Output cyclic interrupt from INTR pin CTFG=0? 1 YES * CTFG 0 Read from time and calendar counters 11.2-3 Reading from Time and Calendar Counters by Dual Reading ...
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Adjusting Second Digit by ±30 Seconds BANK 1 ADJ 11.5 Detecting Start of Oscillation Power-on from 0V XSTP=0 NO YES XSTP 0 Detect start of oscillation In using the XSTP bit, ensure error-free detection of the ...
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RP/RF/RS5C62 QUESTIONS AND ANSWERS ON USE Below are listed questions and answers on using the RP/RF/RS5C62 under the following four categories: 1) Crystal oscillators 2) Hardware 3) Software 4) AC/DC electrical characteristics and others Category Question 1 : What are ...
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Category Question 3 : How many variation factors should be considered? (Subject to use of fixed capacitors and no adjustment of oscillation frequencies) 1. The possible factors behind oscillation frequency variations are : 1-1. Variations in frequencies of crystals, 1-2. ...
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RP/RF/RS5C62 Category Sample Measurements of Variations in Oscillation Characteristics of ICs ppm –5 –10 Question 4 : Why should you avoid connecting either end of the oscillatory capacitors C VSS pin instead of the VDD pin? Answer ...
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Category 2) Software Question the typical software-controlled process of initialization at power-on from 0V, the BSY bit is checked to find that it fails to be switched from “1” to “0”. What is the cause of this ...
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RP/RF/RS5C62 Category Question attempt to disable a cyclic interrupt by setting the CTFG bit to “0” in the control regis- ter 2 results in holding the INTR pin output low. What is the cause of this phenomenon? ...
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Category Question 1 : Can the CS pin input be used held low? 3) Hardware Answer 1: The CS pin input can be used held low, provided that the RD and WR pin inputs ...
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RP/RF/RS5C62 Category Question possible to configure a power switching circuit containing a diode? Answer not recommendable to configure a power switch- ing circuit containing a diode, which causes a voltage drop as shown ...
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Category 4) AC/DC Question 1 : What is the difference between backup current consumption and standby current con- electric sumption? character- Answer 1: Backup current consumption is defined as current consumption in battery backup with the CE istics and pin ...
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... RP/RF/RS5C62 PACKAGE DIMENSIONS RP5C62 (18pin DIP) • 2.54TYP. 1.5TYP. (0.100TYP.) (0.300TYP.) RF5C62 (18pin SOP) • 11.84MAX. (0.466MAX 1.27TYP. (0.050TYP.) RS5C62 (20pin SSOP) • +0.3 6.5 –0 0.45MAX. 0.22±0.1 0.1 42 (Unit: mm/(inch)) 24.8MAX. (0.976MAX 0.46 +0.15 –0.1 +0.006 (0.018 ) –0.004 10 9 +0.1 0.41TYP – ...
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TAPING SPECIFICATIONS RF5C62 (18pin SOP) • 0.3±0.05 3.35±0.1 RS5C62 (20pin SSOP) • 0.3±0.1 2.7MAX. (Unit: mm) ø1.55±0.05 E1 User Direction of Feed. +0.1 ø1.5 –0 E1 User Direction of Feed. RP/RF/RS5C62 4.0±0.1 2.0±0.1 11.05 12±0.1 E2 4.0±0.1 2.0±0.05 6.7 8.0±0.1 ...
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RICOH COMPANY, LTD. ELECTRONIC DEVICES DIVISION HEADQUARTERS 13-1, Himemuro-cho, Ikeda City, Osaka 563-8501, JAPAN Phone 81-727-53-1111 Fax 81-727-53-6011 YOKOHAMA OFFICE (International Sales) 3-2-3, Shin-Yokohama, Kohoku-ku, Yokohama City, Kanagawa 222-8530, JAPAN Phone 81-45-477-1697 Fax 81-45-477-1694 • 1695 http://www.ricoh.co.jp/LSI/english/ RICOH CORPORATION ELECTRONIC ...