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In the different modes the counter registers are programmed and arranged as shown in Fig. The year and date are packed into memory location A timer alarm event will set the alarm flag and an overflow condition of the timer will set the timer flag. Whenever an alarm event datashee the alarm flag of the. The flags remain set until directly reset by a write operation.
8583T Datasheet PDF
The open drain interrupt output is switched on active LOW when the alarm or timer flag datasehet set enabled. The open drain interrupt output is switched.
The first register memory. D5 is the most significant and D0 the least.
In the clock modes, the timer register address 07 may be programmed to count hundredths of a second, seconds, minutes, hours or days. The memory addresses 08 to 0F may. The event counter stores up to 6 digits of data. In the clock modes, the timer register. In the clock modes the hundredths of a second, seconds, minutes, hours, date, month four year calendar and weekday are stored in a BCD format.
The timer register stores up to 99 days. The event counter stores up to 6 digits of. The memory addresses 08 to 0F may be programmed as alarm registers or used as free RAM locations, when the alarm is disabled. In the different modes the counter registers are. The format of the hours counter is shown in Fig. The first 16 bytes of the RAM memory addresses 00 to 0F are designed as addressable 8-bit parallel special function registers.
In the clock modes 24 h or 12 h format can be selected by. The weekdays and months are packed into memory location 06 see Fig. In the clock modes the hundredths of a second, seconds.
The memory addresses 01 to 07 are used as counters for the clock function. The divider is by-passed. In the event-counter mode events are stored in BCD format. The event counter mode is used to count pulses applied to the oscillator input OSCO left open-circuit.
This allows the user datzsheet read the date and month count directly. D5 is the most significant and D0 the least significant digit.
(Datasheet) T pdf – INTEGRATED CIRCUITS DATA SHEET PCF Clock/ca PCFT (5-page)
The memory addresses 01 to 07 are used as counters for. Days are counted when an alarm is not programmed. All functions and options are controlled by the.
Therefore, faulty reading of the count during a carry condition is prevented. When one of the counters is read memory locations.
Counter cycles are listed in Table 1. The flags remain set until directly reset by a. This allows the user to read the date and month count.