PCF8593P,112 NXP Semiconductors, PCF8593P,112 Datasheet - Page 4

• Manufacturer Part Number: PCF8593P,112
• Description: IC CLOCK/CALENDAR LOW PWR 8-DIP
• Manufacturer: NXP Semiconductors
• Type: Clock/Calendar/NVSRAMr

Specifications of PCF8593P,112

• Package / Case: 8-DIP (0.300", 7.62mm)
• Time Format: HH:MM:SS:hh (12/24 hr)
• Date Format: YY-MM-DD-dd
• Memory Size: 8B
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Function: Clock/Calendar/Alarm/Timer Interrupt
• Rtc Memory Size: 8 Byte
• Supply Voltage (max): 6 V
• Supply Voltage (min): 1 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: Through Hole
• Rtc Bus Interface: Serial (I2C)
• Bus Type: Serial (I2C)
• User Ram: 8Byte
• Package Type: PDIP
• Operating Supply Voltage (max): 6V
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Pin Count: 8
• Mounting: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-1089-5; 935151750112; PCF8593N

NXP Semiconductors
7. Functional description
PCF8593
Product data sheet
7.1 Counter function modes
7.2 Alarm function modes
The PCF8593 contains sixteen 8 bit registers with an 8 bit auto-incrementing address
register, an on-chip 32.768 kHz oscillator circuit, a frequency divider and a serial two-line
bidirectional I
The first 8 registers (memory addresses 00h to 07h) are designed as addressable 8 bit
parallel registers. The first register (memory address 00h) is used as a control and status
register. The memory addresses 01h to 07h are used as counters for the clock function.
The memory addresses 08h to 0Fh may be programmed as alarm registers or used as
free RAM locations.
When the control and status register is programmed, a 32.768 kHz clock mode, a 50 Hz
clock mode or an event-counter mode can be selected.
In the clock modes the hundredths of a second, seconds, minutes, hours, date, month
(four year calendar) and weekday are stored in a Binary Coded Decimal (BCD) format.
The timer register stores up to 99 days. The event counter mode is used to count pulses
applied to the oscillator input (OSCO left open-circuit). The event counter stores up to 6
digits of data.
When one of the counters is read (memory locations 01h to 07h), the contents of all
counters are strobed into capture latches at the beginning of a read cycle. Therefore,
faulty reading of the counter during a carry condition is prevented. When a counter is
written, other counters are not affected.
By setting the alarm enable bit of the control and status register the alarm control register
(address 08h) is activated.
By setting the alarm control register, a dated alarm, a daily alarm, a weekday alarm, or a
timer alarm may be programmed. In the clock modes, the timer register (address 07h)
may be programmed to count hundredths of a second, seconds, minutes, hours, or days.
Days are counted when an alarm is not programmed.
Whenever an alarm event occurs the alarm flag of the control and status register is set. A
timer alarm event will set the alarm flag and an overflow condition of the timer will set the
timer flag. The open-drain interrupt output is switched on (active LOW) when the alarm or
timer flag is set (enabled). The flags remain set until directly reset by a write operation.
When the alarm is disabled (bit 2 of control and status register set logic 0) the alarm
registers at addresses 08h to 0Fh may be used as free RAM.
2
C-bus interface.
All information provided in this document is subject to legal disclaimers.
Rev. 04 — 6 October 2010
Low power clock and calendar
PCF8593
© NXP B.V. 2010. All rights reserved.
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