Real time clock module 2 Product Number (2,000 pcs / Reel) REAL TIME CLOCK MODULE (I C-Bus) RX8111CE A : X1B000421000115 Time stamp function and Low current consumption RX8111CE B : X1B000421000215 RX8111CE Built in frequency adjusted 32.768 kHz crystal unit 2 Interface Type I C -Bus Low backup current 100 nA Typ. / 3 V Auto power switching function Automatically switches to backup power supply by monitoring the VDD voltage Time stamp function 8 times stamped from year to 1/256 seconds Interrupt output Wake up every minute or every second Alarm interruption Day, date, hour, minute, second RX8111CE Auto repeat wakeup timer interruption ( 3.2 x 2.5 mm, t = 1.0 mm Max. ) Self-monitoring interruption Crystal oscillation stop, V low, V low BAT DD 2 The I C-Bus is a trademark of NXP Semiconductors Block diagram Overview Interface type 2 VOUT I C-Bus interface Fast-Mode 400 kHz Auto power switch function Battery backup connection example (1) The V voltage is monitored and it switches to the backup DD VBAT VDD VBAT Power power supply by the automatic operation Control VDD Backup power supply switching voltage 1.2 V Min. VBAT (VDET1) VIO Detector Detector VCMP Clock output function VLOW R Output frequency is selectable from 32.768 kHz, 1024 Hz, 1 Hz RTC Main Circuit I/O When the clock output is not used, the FOUT pin can be used as SCL C primary 32.768kHz a timer output pin (CMOS) battery Register Bus SDA Wakeup timer function Control Interface Selectable from 244 s to 32 years (24 bit x 1 ch.) OSC (System Battery backup connection example (2) Timer source clock selectable from 1/60 Hz, 1 Hz, 64 Hz, 4096 Hz Control) Timer VBAT Auto release after interrupt output from /INT pin at timer Register EVIN completes Event R 32kHz Controller This operation is auto repeat with a selected cycle, it can be used to /INT C EDLC 1kHz like a watchdog timer Interrupts Alarm,Timer, Divider or Update,Event Controller Time stamp function secondary 512Hz Clock 8 times stamped from year to 1/256 seconds battery to and The time stamp trigger inputs from EVIN pin, self-monitoring and 1Hz Calendar 2 Divider I C software command User RAM GND EVIN pin has function of chattering-cancel FOUT FOUT Controller Alarm function FOUT, Timer It is possible program from year to second Self-monitoring interruption Crystal oscillation stop, VBAT low, VDD low Pin Functin Terminal connection / External dimensionsUnit: mm Signal Name I / O Function EVIN Input External event input pin (Pull up/down and polarity are selectable by software) Pin Connection SCL Input Serial clock input pin 1 VDD SDA Input / Output Serial data input and output pin 2 VOUT Frequency output pin (CMOS) FOUT Output 3 VBAT (frequency selection: 32.768 kHz, 1024 Hz, 1 Hz) 4 FOUT /INT Output Interrupts output by Alarm and Timer events (N-ch. open drain) 5 SCL Power-supply pin VDD 6 EVIN - Possible to supply different voltage from VIO 7 SDA Interface power supply pin VIO - 8 VIO Input to supply the voltage same as a host 9 GND Internal voltage output pin VOUT - 10 /INT Connect bypass capacitor of 1.0 mF This is a power supply pin for backup battery VBAT Connect an EDLC, a secondary battery, a primary battery - In the backup voltage range, supplied to IC, from this pin GND - Ground pin Specifications (characteristics) Refer to application manual for details Recommended Operating Conditions Current consumption characteristics Ta = -40 C to +85 C Item Symbol Conditions Min. Typ. Max. Unit Item Symbol Conditions Min. Typ. Max. Unit Operating supply voltage VDD - 1.6 3.0 5.5 V SCL = SDA = L, FOUT = OFF, /INT = OFF, Clock supply voltage VCLK - 1.1 3.0 5.5 V VBAT = 3.0 V, VDD = VIO = 0.0 V, IBAT - 100 450 nA CHGEN = 0b, INIEN = 0b, Operating temperature Ta - -40 +25 +85 C SWSEL0 = 1, SWSEL1 = 0 Current consumption VDD detect voltage -VDET1 VDD, Fall 1.20 1.40 1.60 V FOUT = 32.768 kHz, /INT = OFF, Frequency characteristics I32k VDD = VIO = 3.0 V, - 2.0 3.0 mA Item Grade Symbol Conditions Min. Typ. Max. Unit FOUT pin CL = 15 pF A -11.5 - +11.5 Ta = +25 C -6 Frequency tolerance D f / f x 10 VDD = 3.0 V B - -23 +23 VDD = 2.75 V Oscillation start-up time tSTA - 0.3 1.0 s to 5.5 V PROMOTION OF ENVIRONMENTAL MANAGEMENT SYSTEM CONFORMING TO INTERNATIONAL STANDARDS At Seiko Epson, all environmental initiatives operate under the Plan-Do-Check-Action (PDCA) cycle designed to achieve continuous ISO 14000 is an international standard for environmental improvements. 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