PCF8583T/5,512 NXP Semiconductors, PCF8583T/5,512 Datasheet - Page 13

• Manufacturer Part Number: PCF8583T/5,512
• Description: IC CLK/CALENDAR 240X8 RAM 8-SOIC
• Manufacturer: NXP Semiconductors
• Type: Clock/Calendar/NVSRAMr

Specifications of PCF8583T/5,512

• Package / Case: 8-SOIC (7.5mm Width)
• Time Format: HH:MM:SS (12/24 hr)
• Memory Size: 240B
• Date Format: YY-MM-DD
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Function: Clock, Calendar, Alarm, Timer Interrupt
• Rtc Memory Size: 240 B
• Supply Voltage (max): 6 V
• Supply Voltage (min): 2.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935276539512; PCF8583TD; PCF8583TD

NXP Semiconductors
PCF8583
Product data sheet
7.10 Oscillator and divider
7.9 Interrupt output
this mode, the timer (location 07h) increments once for every one, one hundred, ten
thousand, or 1 million events, depending on the value programmed in bits 0, 1 and 2 of
the alarm control register. In all other events, the timer functions are as in the clock mode.
The conditions for activating the output INT (active LOW) are determined by appropriate
programming of the alarm control register. These conditions are clock alarm, timer alarm,
timer overflow, and event counter alarm. An interrupt occurs when the alarm flag or the
timer flag is set, and the corresponding interrupt is enabled. In all events, the interrupt is
cleared only by software resetting of the flag which initiated the interrupt.
In the clock mode, if the alarm enable is not activated (alarm enable bit of the control and
status register is logic 0), the interrupt output toggles at 1 Hz with a 50 % duty cycle (may
be used for calibration). This is the default power-on state of the device. The OFF voltage
of the interrupt output may exceed the supply voltage, up to a maximum of 6.0 V. A logic
diagram of the interrupt output is shown in
A 32.768 kHz quartz crystal has to be connected to OSCI and OSCO. A trimmer capacitor
between OSCI and V
signal is derived from the quartz oscillator for the clock counters.
Fig 13. Alarm control register, event counter mode
MSB
7
All information provided in this document is subject to legal disclaimers.
013aaa376
6
DD
Rev. 06 — 6 October 2010
is used for tuning the oscillator (see
5
4
3
2
Figure
1
Clock and calendar with 240 x 8-bit RAM
LSB
0
12.
clock alarm function:
00
01
10
11
memory location 08h
reset state: 0000 0000
000
001
010
011
100
101
110
111
timer interrupt enable:
0
1
timer function:
0
1
timer alarm enable:
0
1
alarm interrupt enable:
Section
no event alarm
event alarm
not allowed
not allowed
no timer alarm
timer alarm
no timer
units
100
10 000
1 000 000
not allowed
not allowed
test mode, all counters
in parallel
timer flag, no interrupt
timer flag, interrupt
alarm flag, no interrupt
alarm flag, interrupt
11.1). A 100 Hz clock
PCF8583
© NXP B.V. 2010. All rights reserved.
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