PDF RS5C316A Data sheet ( Hoja de datos )

Número de pieza	RS5C316A
Descripción	ULTRA-COMPACT SERIAL ALARM REAL-TIME CLOCK ICs
Fabricantes	RICOH electronics devices division
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No Preview Available ! www.DataSheet4U.com ULTRA-COMPACT SERIAL ALARM REAL-TIME CLOCK ICs RS5C316A/B APPLICATION MANUAL DataSheet4U.com DataShee DataSheet4U.com ELECTRONIC DEVICES DIVISION NO.EA-035-9908 1 page www.DataSheet4U.com URTRA-COMPACT SERIAL ALARM REAL TIME CLOCK ICs RS5C316A/B OUTLINE The RS5C316A/B are CMOS type real-time clock ICs which are connected to the CPU via three signal lines and capable of serial transmission of clock and calendar data to the CPU. The RS5C316A/B can generate various periodic interrupt clock pulses lasting for long period (one month), further alarm interrupt can be made by days of the week, hours, and minutes. Driving an oscillation circuit at constant volt- age, the circuit undergoes few voltage fluctuations and consequently realizes low current consumption (0.6µA at 3V). It also provides an oscillator halt sensing function for application to data validity at power-on and other occa- sions. 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. et4U.com FEATURES DataShee • Time keeping voltage 1.6V to 6.0V • Lowest supply current 0.6µA TYP. (1.5µA MDAaXta.)Sahte3eVt4U.com • Connection to the CPU via only three pins: CE, SCLK/SCLK and SIO for addressing and data read/write • A clock counter (counting hours, minutes, and seconds) and a calendar counter (counting leap years, years, months, days, and days of the week) in BCD code • Periodic interrupt pulses to the CPU with cycles ranging from one month to 1/1024Hz, with interrupt flags and interrupt halt • Alarm interrupt (days of the week, hours, minutes) • Oscillator halt sensing to judge internal data validity • Second digit adjustment by ±30 seconds • 12-hour or 24-hour time display selectable • Automatic leap year recognition up to the year 2099 • CMOS logic • Package: 8pin SSOP (0.65mm pitch) DataSheet4U.com 1 5 Page www.DataSheet4U.com RS5C316A/B et4U.com FUNCTIONAL DESCRIPTIONS 1. Addressing A3 00 10 20 30 40 50 60 70 81 91 A1 B1 C1 D1 E1 F1 Address A2 A1 00 00 01 01 10 10 11 11 00 00 01 01 10 10 11 11 Registers A0 1-second counter 0 Day of the week alarm register 1 (BANK=0) (BANK=1) 10-second counter 1 Day of the week alarm register 2 (BANK=0) (BANK=1) 1-minute counter 0 1-minute alarm register (BANK=0) (BANK=1) 10-minute counter 1 10-minute alarm register (BANK=0) (BANK=1) 1-hour counter 0 1-hour alarm register (BANK=0) (BANK=1) 10-hour counter 1 10-hour alarm register (BANK=0) (BANK=1) 0 Day of the weekDcoautnatSerheet4U.com(BANK=0) 1 Interrupt cycle register (BANK=0, 1) 0 1-day counter (BANK=0) 1 10-day counter (BANK=0) 0 1-month counter (BANK=0) 1 10-month counter (BANK=0) 0 1-year counter (BANK=0) 1 10-year counter (BANK=0) 0 Control register 1 (BANK=0, 1) 1 Control register 2 (BANK=0, 1) D3 S8 AW3 —2 ALC M8 AM8 — — H8 AH8 — ALE — CT3 D8 — MO8 — Y8 Y80 CTFG 12/24 Data 1 D2 D1 S4 S2 D0 S1 AW2 AW1 AW0 S40 S20 S10 AW6 AW5 AW4 M4 M2 M1 AM4 AM2 AM1 M40 M20 M10 AM40 AM20 AM10 H4 H2 H1 AH4 AH2 AH1 — P/A, H20 H10 DataShee — AP/A, AH20 AH10 W4 W2 W1 CT2 CT1 CT0 D4 D2 D1 — D20 D10 MO4 MO2 MO1 — — MO10 Y4 Y2 Y1 Y40 ALFG NOP Y20 Y10 WTEN6/XSTP4 ADJ/BSY 3 BANK 5 TEST 6 1) All the listed data can be read and written. 2) The “—” mark indicates data which can be read only and set to “0” when read. 3) The ADJ/BSY bit of the control register is set to ADJ for write operation and BSY for read operation. 4) The WTEN/XSTP bit of the control register is set to WTEN for write operation and XSTP for read operation. 5) The clock/calendar counter and the alarm register can be selected when the BANK=0 and BANK=1 respectively. To designate the BANK is unnec- essary for interrupt cycle register and control register 1/2. *6) The WTEN bit and TEST bit are set to “1” when CE is “L”. DataSheet4U.com 7 11 Page

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Número de pieza	Descripción	Fabricantes
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