actual size real time clock module block diagram ? ? ? ? overview ? ? interrupts controller a larm registe r osc / irq1 bus interface circuit do/fout ( 32.768 khz ) control register and system controller divider clock power controller vbat and di / sda ce/foe user ram 128 bit vdd clk/scl / irq2 calendr spisel timer register a larm, fout timer, fout vio ? interface type. ? spi-bus and i 2 c-bus interface. ?by a terminal, a switchover of the interface is possible. ? built-in auto power switching function ?when v dd deteriorates, internal source is switched to v bat . ? frequency output function ? ? output frequency can be selected as 32.768khz, 1024hz, 1hz. ? timer function ?timer function can be set up between 1/4096 second and 65535 hours. ?timing period are 1hour, 1min, 64hz, 4096hz. ?it is recorded automatic to tf-bit at the time of event occurrence, and possible to output with /irq1 or /irq2 pin. ? alarm function ?alarm function can be set to day of week, day, hour, and minute. ?it is recorded automatic to af-bit at the time of event occurrence, and possible to output with /irq1 pin output. ? user ram ?128 bit (8 bit x 16, sram) pin function ? ? ? ? terminal connectio n ? / external dimension s ? ? (unit:mm) ? ? signal name input/output function spisel input the interface select pin. spi is chosen at a "h" level (v io voltage) / i 2 c is chosen at a "l" level (gnd voltage). ce/foe input spi: should be held high to allow access to the cpu. incorporates a pull-down resistor. i 2 c: it is an input pin for controlling the do/fout output. w hen the frequency output from a do/fout pin does not need, ce/foe pin must be connected to gnd. clk/scl input this is a shift clock input pin for serial data transmission. di/sda input / output spi: this is the data input pin for serial data transfer. i 2 c: this is the data input/output pin for serial data transfer. do/fout output spi: this is the data output pin for serial data transfer. i 2 c: this is the c-mos output pin with output control provided via the ce/foe pin. (frequency selection: 32.768 khz / 1024 hz / 1hz / hi-z) / irq1 output this pin outputs interrupt signals ("l" level) for alarm, timer, time update, and fout. this is an n-ch open-drain output. this pin can output even a backup mode. / irq2 output this pin outputs interrupt signals ("l" level) for timer and fout. ? this is an c-mos output. this pin becomes hi-z in less than v dd =1.6v. v dd ? this is a power-supply pin. it can impress the voltage unlike v io . v io ? this pin is a power supply for input and the output and input / output pins. connected to a positive power supply. v bat ? connect a secondary battery or capacitor for backup power supply. if a backup power supply is not present, this pin connect to v dd gnd ? connected to a ground. ??????? ?? rx ? 6110 ? sa 1. clk/scl 10.1 ?? ? 0.2 5.0 7.4 ??? 0.2 3.2 ??? 0.1 1.27 14 . n.c. 2. di/sda 13 . n.c. 3. do/fout 12 . /irq1 4. ce/foe 11 . vio 5. spisel 10 . vdd 6. gnd 9. vbat 7. /irq2 8. n.c. sop - 14 pin the metal case inside of the molding compound may be exposed on the top or bottom of this product. this purely cosmetic and does not have any effect on quality, reliability or electrical specs. s p ecifications ( characteristics ) * ? refer to a pp lication manual for details. ? ? recommended operating conditions item symbol conditions min. typ. max. unit power voltage v dd - 1.6 3.0 5.5 v clock voltage v clk - 1.1 3.0 5.5 v operating temperature t opr - -40 +25 +85 ? c ? ? frequency characteristics item symbol conditions rating unit frequency tolerance ?? f ? / ? f t a ? = ? +25 ?? c v dd ? = ? 3.0 ? v ?? b: 5 ??? 23 ? ? ?? 10 ? 6 oscillation start-up time t sta t a ? = ? +25 ?? c v dd ? = ? 1.6 ? v 1 ?? max. s ?? equivalent to 1 minute of monthly deviation (excluding offset.) ? ? current consumption characteristics ? t a ? ? ? ? c ? ? ? ? c item symbol conditions min. typ. max. unit current consumption i bk v bat = 3.0 v input pins are "l" ,v dd = 0 v do/fout=off, fclk = 0 hz, /irq1,2 = off, tsel2=?1? it include an off leak current of sw between the power supply (v bat -v dd ) - 130 250 na i 32k v dd = 3.0 v f clk = 0 hz, spisel=vio, /irq1,2 ? = ? off, ? ce/foe ? = ? vio, do/fout ? : ? 32.768 ? khz on ? , cl ? ? ? ? 1.5 ? ? 2.1 ? ? a real time clock module (spi & i 2 c-bus ) power switching and low current consumption rx6110 ? sa ? built in frequency adjusted 32.768 khz crystal unit. ? interface type : spi & i 2 c -bus ? operating voltage range : 1.6 ? v ? to ? 5.5 ? v ? wide timekeeper voltage range : 1.1 ? v ? to ? 5.5 ? v ? low backup current : 130 ? na ?? / ?? 3 ? v ? ( ? typ. ? ) ? ? built-in user ram : 128 ? bit ? ( ? 8 ? bit ??? 16, ? sram) ? auto power switching functions : when v dd deteriorates than 1.6v, internal source is switched to v bat . ? the various functions include full calendar, alarm, timer. epson is prepared linux driver for this product. ( http://www5.epsondevice.com/en/quartz/tech/linux_for_rtc/index.html ) the registered trademark linux? is used pursuant to a sublicense from lmi(linux mark institute) the i 2 c-bus is a trademark of nxp semiconductors product number (please contact us) RX6110SA : x1b000232xxxx00
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