RS5C316B RICOH Co.,Ltd., RS5C316B Datasheet
RS5C316B
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RS5C316B Summary of contents
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ULTRA-COMPACT SERIAL ALARM REAL-TIME CLOCK ICs APPLICATION MANUAL ELECTRONIC DEVICES DIVISION RS5C316A/B NO.EA-035-9908 ...
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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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... Registers .................................................................................................. 3. Counters ...................................................................................................... USAGES 1. Read Data (For the RS5C316A) 2. Write Data (For the RS5C316A) 3. Read Data (For the RS5C316B) 4. Write Data (For the RS5C316B) .................................................................................................... 5. CE Pin 6. Configuration of Oscillating Circuit 7. Oscillator Halt Sensing 8. Typical Power Supply Circuit 9. Oscillation Frequency Adjustment ..................................................................................... 10. Interrupt Operation ...
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Typical Application 12. Typical Characteristic Measurements 13. Typical Software-based Operations PACKAGE DIMENSIONS TAPING SPECIFICATION ............................................................... ................................................................. .............................................................................. .............................................................................. ...
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... Integrated into an ultra compact and ultra thin 8pin SSOP (0.65mm pitch), the RS5C316A/B are the optimum choice for equipment requiring small size and low power consumption. The RS5C316A and the RS5C316B reads/writes data at falling and rising edge of serial clock respectively. FEATURES • ...
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... OSCIN OSC OSCOUT OSC DETECT INTR ) RS5C316A: SCLK RS5C316B: SCLK * APPLICATIONS • Communication equipment (Multi-function telephone, portable telephone, PHS, pager) • Business machines (Facsimile, portable facsimile) • Personal computer (Desktop type, notebook type, word processor, PDA, electronic notebook, TV games) • Audio visual equipment (Portable audio equipment, video camera, camera, digital camera, remote control equip- ment) • ...
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PIN DESCRIPTIONS Symbol Name Pin No. CE Chip enable input 1 SCLK (A type) Shift clock input 2 SCLK (B type) SIO Serial input/output 3 INTR Interrupt output 5 OSCIN Oscillator circuit 7 OSCOUT input/output 6 VDD Positive/Negative 8 VSS ...
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RS5C316A/B ABSOLUTE MAXIMUM RATINGS Symbol Item V Supply voltage DD V Input voltage I V Output voltage Output voltage Power dissipation D Topt Operating temperature Tstg Storage temperature Absolute Maximum ratings are threshold limit ...
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DC CHARACTERISTICS Unless otherwise specified: V Symbol Item V “H” input voltage CE, SCLK/SCLK, SIO IH V “L” input voltage CE, SCLK/SCLK, SIO IL I “H” output current SIO OH I SIO OL1 “L” output current I INTR OL2 R ...
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... RS5C316A/B TIMING CHARTS Input/Output conditions Any SCLK/SCLK state is allowed in the hatched area. * • RS5C316A CE SCLK Read cycle SIO Write cycle SIO • RS5C316B CE t CKS SCLK Read cycle SIO Write cycle SIO =0 =0 CES SCK ...
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FUNCTIONAL DESCRIPTIONS 1. Addressing Address 1-second counter Day of the week alarm register 1 10-second counter Day of the week alarm register 2 1-minute counter 2 ...
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RS5C316A/B 2. Registers 2.1 Control Register 1 (at Eh CTFG ALFG WTEN CTFG ALFG XSTP 2.1-1 (ADJ) The following operations are performed by setting the ADJ bit to 1. After this bit is set to 1, the ...
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When the BSY bit is 1, the clock and calendar counter are being updated. Consequently, write operation should be performed for the counters when the BSY bit is 0. Meanwhile, read operation is normally performed for the counters ...
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RS5C316A/B 2.1-6 (CTFG) The CTFG bit is set to 1 when interrupt pulses are output from the INTR pin held at the low level. There are two interrupt modes selectable: the pulse mode (when the CT to 1). The CTFG ...
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Control Register 2 (at Fh 12/24 NOP BANK TEST 12/24 NOP BANK TEST 1) (TEST) Set the TEST bit ordinary operation. TEST bit is set automatically to 1 when the CE pin ...
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RS5C316A/B 2.3 Interrupt cycle Register ( The bits are used to select the ...
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Counters 3.1 Clock counter (BANK 0, at 0h-5h ...
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RS5C316A/B 3.3 Calendar counter (BANK 0, at 8h-Dh ...
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USAGES 1. Read Data (For the RS5C316A) The real-time clock becomes accessible by switching the CE pin from the low level to high level to enable inter- facing with the CPU and then inputting setting data (control bits and address ...
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RS5C316A/B 2. Write Data (For the RS5C316A) Writing data to the real-time clock requires inputting setting data (control bits, address bits and data bits) to the SIO pin and then establishing the write mode by using a control bit R/W ...
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... Read Data (For the RS5C316B) The real-time clock becomes accessible by switching the CE pin from the low level to high level to enable inter- facing with the CPU and then inputting setting data (control bits and address bits) to the SIO pin in synchronization with shift clock pulses from the SCLK pin. The input data are registered in synchronization with the rising edge of the SCLK ...
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... RS5C316A/B 4. Write Data (For the RS5C316B) Writing data to the real-time clock requires inputting setting data (control bits, address bits and data bits) to the SIO pin and then establishing the write mode by using a control bit R/W in the same manner as in read operation. ) Control bits and address bits are described in the previous section on read cycle. ...
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... CE pin is switched to the high level. When the power turns on from 0V, the CE pin should be set low or open once. ) RS5C316A: SCLK * Shift clock pulses RS5C316B: SCLK Address Data Write Data Read Data Read control bit Control bit Considerations ...
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RS5C316A/B 6. Configuration of Oscillating Circuit VDD The oscillation circuit is driven at a constant voltage of about 1.5V relative to the Vss level. * Consequently, it generates a wave form having a ...
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Oscillator Halt Sensing Oscillation Halt can be sensed through monitoring the XSTP bit with preceding setting of the XSTP bit writing any data to the control register 1. Upon oscillator halt sensing, the XSTP bit is ...
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RS5C316A/B 8. Typical Power Supply Circuit RS5C316 A INTR B OSCIN OSCOUT VDD VSS 9. Oscillation Frequency Adjustment 9.1 Oscillation Frequency Measurement VDD 32kHz OSCIN C G OSCOUT INTR CE VSS 22 1) Connect the capacitance of the oscillation circuit ...
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Oscillation Frequency Adjustment (For fixed capacitance) Fix C Change C L value of crystal Optimize END 1) To ensure that the crystal is matched to the IC, inquire its crystal supplier about its ...
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RS5C316A/B 10. Interrupt Operation Two interrupt operations are available: 1) Alarm interrupt...........When a registered time for alarm (such as day-of-the-week, hour or minute) coincide with calendar counter (such as day-of-the-week, hour or minute) interrupt to the CPU are requested with ...
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Periodic (Clock) Interrupt The INTR pin output, the interrupt cycle register, and the CTFG bit can be used to interrupt the CPU in a certain cycle. The interrupt cycle register can be used to select either one of two ...
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RS5C316A/B 11. Typical Application System power supply VCC VSS 1) Connect the capacitance of the oscillation circuit to the VSS pin Mount the high-and low-frequency by-pass capacitors in parallel and very close to the RS5C316. ...
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Typical Characteristic Measurements C VDD OSCIN OSCOUT VSS INTR Frequency counter 12.1 Standby Current vs Topt = 25 C 2 ...
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RS5C316A/B 12.5 Oscillation Frequency Deviation vs. C (f0: C =10pF reference 3V, Topt = –20 – (pF) G 12.7 Oscillation Frequency Deviation vs. Temperature ...
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Typical Software-based Operations 13.1 Initialization upon Power-on Start 1 Power-on * YES 2 * XSTP= Interrupt cycle register 0h Control register 2 3h (BANK 1) 10-hour alarm register 0h (ALE Control register 1 ...
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RS5C316A/B 13.3 Read Operation from Clock and Calendar Counters 13.3-1 CE=H Control register 1 0h BSY=0? YES Read from clock and calendar counters CE=L Read data as described in 13.3-2 or 13.3-3 when it takes (1/1024) sec or ...
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Write Operation to Alarm time BANK 1 Set alarm (hour or minute, day-of the week) ALE 1 13.5 Second-digit Adjustment by ±30 seconds Control register 1 3h 13.6 Oscillation Start Judgment Power- YES XSTP=0? NO Control register ...
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RS5C316A/B 13.7 Interrupt Operation 13.7-1 Cyclic Interrupt Operation Set interrupt cycle register Interrupt to CPU CTFG=1? YES Control register 1 2h Cyclic interrupt operation 13.7-2 Alarm Interrupt Operation Set alarm (hour or minute, day-of the week) ALE 1 Interrupt to ...
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... PACKAGE DIMENSIONS RS5C316A/B (8pin SSOP, 0.65mm pitch) • 3.5 0 0.775TYP. 0.22 0.1 TAPING SPECIFICATION The RS5C316A/B have one designated taping direction. The product designations for the taping components are “RS5C316A-E2” and “RS5C316B-E2”. (Unit: mm 0.65 0.1 0.15 M (Unit: mm) 4.0 0.1 +0.1 ø1.5 0.3 –0 2.0 0.05 6.7 2.7 MAX. 8.0 0.1 User Direction of Feed. ...
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RICOH COMPANY, LTD. ELECTRONIC DEVICES DIVISION HEADQUARTERS 13-1, Himemuro-cho, Ikeda City, Osaka 563-8501, JAPAN Phone +81-727-53-6003 Fax +81-727-53-2120 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 ...