HT1381 DATASHEET PDF

General Description. The HT is a serial timekeeper IC which provides seconds, minutes, hours, day, date, month and year information. HT datasheet, HT circuit, HT data sheet: HOLTEK – Serial Timekeeper Chip,alldatasheet, datasheet, Datasheet search site for Electronic. HTSOPLF from HOLTEK >> Specification: Timekeeper IC, Date Time Format (Date/Month/Year Technical Datasheet: HTSOPLF Datasheet.

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These two bits should first be specified in order to read from and write to the register array properly. Only three wires are required: When this bit is in high level, the hour mode is selected otherwise it? Both input and output data starts with bit 0.

HT Datasheet pdf – Serial Timekeeper Chip (8SOP) – Holtek Semiconductor

ht181 Then, choose either single mode or burst mode to input the data Both input and output data starts with bit 0. Two modes are available for transferring the data between the microprocessor and the Command byte For each data transfer, a Command Byte is initiated to specify which register is accessed.

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The number of days in each month and leap years are automatically adjusted. Taipei Office 5F, No.

HT/HT – Product Details – Holtek

Copy your embed code and put on your site: Refer to the table shown below and follow the steps to write the data to the chip. All other trademarks are the property of their respective owners.

The Write Protect bit cannot be written to in the burst mode. Additional SCLK cycles are ignored. Refer to the suggestion table of page 7. A Hz crystal is required to.

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Data inputs are entered starting with bit 0. A Hz crystal is required to provide the correct timing. One is in single-byte mode ad the other ht1318 in multiple-byte mode.

Data contained in the clock register is in binary coded decimal format. Data can be delivered 1 byte at a time or in a burst of up to 8 bytes. For the most up-to-date information, please visit our web site at http: Data outputs are read starting with bit 0. Holtek reserves the right to alter its products without prior notification. Stresses exceeding the range specified under? Holtek reserves the right to alter its products without prior notification.

There are eight registers used to control the month data, etc. A Hz crystal is required to provide the correct timing. In order to obtain the correct frequency, two additional load capacities C1, C2 are needed. The REST pin must be taken low again after the transfer operation is completed. Elcodis is a trademark of Elcodis Company Ltd. Refer to the table shown below and follow the steps to write the data to the chip. This table illustrates the correlation between Command Byte and their bits: For data input, the data must be read after the rising edge of SCLK.

Data outputs are read starting with bit 0. In total, 16 clock pulses are needed for a single byte mode and 72 for burst mode. The value of the capacity depends on how accurate the crystal is. The data bit outputs on the falling edge of the next eight SCLK cycles. This table illustrates the correlation between Command Byte and their bits: Data can be de. In order to obtain the correct frequency, two additional load capacities C1, C2 are needed.

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In order to minimize. Two data transmission modes: When D5 is logic 1, it is PM, otherwise it?

HT1380/HT1381 — Serial Timekeeper Chip

The input signal of SCLK is a sequence of a falling edge followed by a rising edge ddatasheet it is used to synchronize the register data whether read or write. REST remains at high level.

The value of the capacity depends on how accurate the crystal is The REST pin is also used to terminate either single-byte or burst mode data format. For the most up-to-date information, please visit our web site at http: Note that the first data bit to be transmitted on the first falling edge after the last bit of the read command byte is written.

HT1381-8SOPLF

The value of the capacity depends on how accurate the crystal is. Pad Description Pad No. If used generally, unpredictable conditions may occur. The read or write operating flowcharts are shown on the next page. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such h1t381 will be suitable without further modification, ht13381 recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise.

The test mode is used by Holtek only for testing purposes.