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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The clock halt bit must be set to logic 1 oscillator disabled. When datsaheet bit is set to logic 1, the clock oscillator is stopped and the chip goes into a low-power standby mode. When it is set as? A Hz crystal is required to.

Refer to the table shown below and follow the steps to write the data to the chip. These two bits should first be specified in order to read from and write to the register array properly. Both input and output data starts with bit 0.

For data input, the data must be read after the rising edge of SCLK. A Hz crystal is required to provide the correct timing. Pad Description Pad No.

Data can be de- livered 1 byte at a time burst bytes Maximum input serial clock: In order to obtain the correct frequency, two additional load capacities C1, C2 are needed. Datasyeet can be written into the designated register only if the Write Protect signal WP is set to logic 0. We suggest that you can follow the table on the next page. In order to obtain the correct frequency, two additional load capacities C1, C2 are needed.

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This is to determine whether a read, write, or test cycle is operated and whether a single byte or burst mode transfer is to occur. Then, choose either single mode or burst mode to input the data.

REST remains at high level.

HT1381-8SOPLF

Data outputs are read starting with bit 0. All other trademarks are the property of their respective owners. The information appearing in this Data Sheet is believed to be accurate at the time of publication.

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. There are eight registers used to control the month data, etc. The value of the capacity depends on how accurate the crystal is. This table illustrates the correlation between Command Byte and their bits: However, Holtek assumes no responsibility arising from the use of the specifications described.

Taipei Office 5F, No. The Write Protect Register should be set first before restarting the system or before writing the new data to the system, and it should set as logic 1 in the read cycle.

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

The number of days in each month and leap years are automatically adjusted. The read or write operating flowcharts are shown on the next page. Then, choose either single mode or burst mode to input the data The data transfer is illustrated on the next page.

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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.

HT1381 Datasheet PDF

Elcodis is a trademark of Elcodis Company Ltd. Two data transmission modes: This table illustrates the correlation between Command Byte and their bits: In total, 16 clock pulses are needed for a single byte mode and 72 for burst mode. Holtek reserves the right to alter its products without prior notification. Data can be delivered 1 byte at a time or in a burst of up to 8 bytes. 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.

The data bit daasheet on the falling edge of the next eight SCLK cycles. Copy your embed code and put on your site: Data can be de. Data inputs are entered starting with bit 0. One is in single-byte mode ad the other is in multiple-byte mode.

Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.