RXSA:AA3 EPSON | SERCT-ND DigiKey Electronics. RXSA: AA3 Real Mfg Application Notes, RX(SA,NB) Appl Manual. Online Catalog. RXNB Real Time Clock Module by EPSON. RX_H #define RX_H #include “mbed.h” // RTC EPSON RX // 7bit address. linux/drivers/rtc/rtc-rxc. Fetching Driver for Epson’s RTC module RX SA/NB . ctrl2 = rx_read_reg(rx>client, RX_REG_CTRL2);.

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The material is subject to change without notice. Any part of this material may not be reproduced or duplicated in any form or any means without the written permission of Epson Toyocom. The information, applied circuit, program, usage etc. Epson Toyocom does not assume any liability for the occurrence of infringing any patent or copyright of a third party. This material does not authorize the licensing for any patent or intellectual copyrights.

Any product described in this material may contain technology or the subject relating to strategic products under the control of the Foreign Exchange and Foreign Trade Law of Japan and may require rx802 export licence from the Rd8025 of International Trade and industry or other approval from another government agency.

You are also requested that you would not make the products available to any third party who may use the products for such prohibited purposes. These products are intended for general use in electronic equipment.

Tiny RTC I2C

When using them in specific applications that require extremely high reliability such as applications stated elson, it is required to obtain the permission from Epson Toyocom in advance. In this manual for Epson Tyocom, product code and marking will still remain as previously identified prior to the merger.

Due to the on going strategy of gradual unification of part numbers, please review product code and ex8025 as they will change during the course of the coming months. We apologize for the inconvenience, but we will eventually have a unified part numbering system for Epson Toyocom which will be user friendly.

Clock Rx0825 Adjustment Function The various detection Functions Supports I C-Bus’s high speed mode kHz? Select between hr and hr clock mode. Auto calculation of leap years until ? Built-in high-precision clock precision control logic?

rtc: Add EPSON RX support to DS RTC driver – Patchwork

CPU interrupt generation function cycle time range: Oscillation stop detection function used to determine presence of internal data? Power supply voltage monitoring function with selectable detection threshold? Wide clock retention voltage range: Wide interface voltage range: Overview This module is an I C bus interface-compliant real-time clock which includes a In addition to providing a function for generating six types of rx025, a dual alarm function, an oscillation stop detection function used to determine presence of valid internal data at power-onand a power supply voltage monitoring function, this module includes a digital clock precision adjustment function that can be used to set various levels of precision.

Since the internal oscillation circuit is driven at a constant voltage, This implementation of multiple functions in one SMT package is ideal for applications ranging from cellular phones to PDAs and other small electronic devices.


Description of Pins 3. RX – NB rd8025.

SON – 22pin 3. Data input and output across the SDA pin is synchronized with this pin’s clock signal. This pin’s signal is used for input and output of address, data, and ACK bits, synchronized 2 with the serial clock used for Epsoh C communications.

The SDA pin is an N-ch open drain pin during output. Be sure to connect a suitable pull-up resistance relative to the signal line capacity. FOUT terminal is FOE terminal had pull-down resistor built-in and xr8025 voltage is possible regardless of power supply voltage to 5.

This interrupt output A pin is an N-ch open drain output. This interrupt output B pin is an N-ch open drain output. This rx8205 is used by the manufacturer for testing. Do not connect externally.

This pin is connected to a positive power supply. This pin is connected to a ground. This pin has the same voltage level as GND. This pin is not connected to the internal IC. Be sure to connect a bypass capacitor rated at least 0. Precision gap per month: DC Electrical Characteristics 7.

Sr Repeated Start condition P Stop condition When accessing this device, all communication from transmitting the start condition to transmitting the stop condition after access should be completed within 0. Please see also 8. Starting dpson stopping I C bus communications. Overview of Functions 1 Clock functions This function is used to set and read out month, date, day, hour, minute, and second.

Any two-digit year that is a multiple of 4 is treated as a leap year and calculated automatically as such until the year For details, see “8. This function can be used to implement a higher-precision clock function, such as by: Only the clock precision can be adjusted.

The adjustments have no effect on the Clock Precision Adjustment Function”. Select among five Periodic frequency settings: Select among two output waveforms for periodic interrupts: A polling function is also provided to enable monitoring of pin states via registers.

A polling function is also provided to enable checking of each alarm mode by the host. For details on the Alarm W function, see “8. Alarm W function” and for the Alarm D function, see “8. The power drop detection function supply voltage monitoring function uses registers to record when the supply voltage drops below a specified voltage threshold value.

Use registers to specify either of two voltage threshold values: Voltage sampling is performed once per second in consideration of the module’s low current consumption.

While the oscillation stop detection function epxon useful for determining when clock data has become invalid, the supply voltage monitoring function is useful for determining whether or not the clock data is able gx8025 become invalid. The supply voltage monitoring function can also be used to monitor a battery’s supply voltage.

When these functions are utilized in combination with the power-on reset detection function, they are useful for determining whether clock data is valid or invalid when checking for power-on from 0 V or for back-up.


Since neither SCL nor SDA includes a protective diode on the VDD side, rx80225 data interface between hosts with differing supply voltages can still be implemented by adding pull-up resistors to the circuit board. The precision of this Description of Registers 8.

The PON eposn is a power-on reset flag bit. The PON bit is set to “1” when a reset occurs, such as during the initial power-up or when recovering from a supply voltage drop.

At this point, all other register values are undefined, so be sure to perform a reset before using the module. Also, be sure to avoid entering incorrect date and time data, as clock operations are not guaranteed when the time data is incorrect. The TEST bit is used by the manufacturer for testing. Be sure to set “0” for this bit. Address D a reserved register is used for wpson manufacturer’s settings. Do not read from or write to this register. All bits marked tx8025 a ” 0 ” in the above table should be set as “0”.

Their value when read will be “0”. All bits marked with ” ” are read-only bits.

Their value when read is always “0”. The time counter counts seconds, minutes, and hours. The data rx80025 is BCD format except during hour mode. For example, when the “seconds” register value is ” ” it indicates 59 seconds. Note with caution that writing non-existent time data may interfere with normal operation of the time counter.

drivers/rtc/rtc-rxc – kernel/msm – Git at Google

This second counter counts from “00” to “01,” “02,” and up to 59 seconds, after which it starts again from 00 seconds. When a value is written to the second counter, the internal counter is also reset to zero in less than one second. This minute counter counts from “00” to “01,” “02,” and up to 59 minutes, after which epsob starts again from 00 minutes.

During hour clock operation, bit 5 functions as H20 two-digit hour display. The day counter is a divide-by-7 counter that counts from 00 to 01 rc8025 up 06 before starting again from The correspondence between days and count values is shown below. Remark 00 h 01 h 02 h 03 h 04 h 05 h 06 h Do not enter a setting for this bit. The auto calendar function updates all dates, months, and years from January 1, to December 31, The data format is BCD format.

For example, a date register value of ” ” indicates the 31st. Note with caution that writing non-existent date data may interfere with normal operation of the calendar counter.