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PDF PCF85063AT Data sheet ( Hoja de datos )

Número de pieza PCF85063AT
Descripción Tiny Real-Time Clock/calendar
Fabricantes NXP Semiconductors 
Logotipo NXP Semiconductors Logotipo



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No Preview Available ! PCF85063AT Hoja de datos, Descripción, Manual

PCF85063ATL
Tiny Real-Time Clock/calendar with alarm function and
I2C-bus
Rev. 2 — 15 April 2013
Product data sheet
1. General description
The PCF85063ATL is a CMOS1 Real-Time Clock (RTC) and calendar optimized for low
power consumption. An offset register allows fine-tuning of the clock. All addresses and
data are transferred serially via the two-line bidirectional I2C-bus. Maximum data rate is
400 kbit/s. The register address is incremented automatically after each written or read
data byte.
2. Features and benefits
Provides year, month, day, weekday, hours, minutes, and seconds based on a
32.768 kHz quartz crystal
Clock operating voltage: 0.9 V to 5.5 V
Low current; typical 0.27 A at VDD = 3.0 V and Tamb = 25 C
400 kHz two-line I2C-bus interface (at VDD = 1.8 V to 5.5 V)
Programmable clock output for peripheral devices (32.768 kHz, 16.384 kHz,
8.192 kHz, 4.096 kHz, 2.048 kHz, 1.024 kHz, and 1 Hz)
Selectable integrated oscillator load capacitors for CL = 7 pF or CL = 12.5 pF
Alarm function
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Countdown timer
Minute and half minute interrupt
Internal Power-On Reset (POR)
Programmable offset register for frequency adjustment
3. Applications
Digital still camera
Digital video camera
Printers
Copy machines
Mobile equipment
Battery powered devices
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 19.
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8.1 Registers organization
Table 5. Registers overview
Bit positions labeled as - are not implemented. After reset, all registers are set according to Table 8 on page 9.
Address Register name Bit
76543210
Control and status registers
00h Control_1
EXT_TEST -
STOP
SR
-
CIE
12_24
CAP_SEL
01h Control_2
AIE
AF
MI
HMI TF
COF[2:0]
02h Offset
MODE
OFFSET[6:0]
03h RAM_byte
B[7:0]
Time and date registers
04h Seconds
OS
SECONDS (0 to 59)
05h Minutes
-
MINUTES (0 to 59)
06h Hours
-
-
AMPM
HOURS (1 to 12) in 12 hour mode
HOURS (0 to 23) in 24 hour mode
07h Days - - DAYS (1 to 31)
08h Weekdays
-
-
-
-
-
WEEKDAYS (0 to 6)
09h Months
-
-
-
MONTHS (1 to 12)
0Ah Years
YEARS (0 to 99)
Alarm registers
0Bh
Second_alarm AEN_S
SECOND_ALARM (0 to 59)
0Ch
Minute_alarm AEN_M
MINUTE_ALARM (0 to 59)
0Dh
Hour_alarm
AEN_H
-
AMPM
HOUR_ALARM (1 to 12) in 12 hour mode
HOUR_ALARM (0 to 23) in 24 hour mode
0Eh
Day_alarm
AEN_D
-
DAY_ALARM (1 to 31)
0Fh
Weekday_alarm AEN_W
-
-
-
-
WEEKDAY_ALARM (0 to 6)
Timer registers
10h
Timer_value
T[7:0]
11h
Timer_mode
-
-
-
TCF[1:0]
TE TIE TI_TP
Reference
Section 8.2.1
Section 8.2.2
Section 8.2.3
Section 8.2.4
Section 8.3.1
Section 8.3.2
Section 8.3.3
Section 8.3.4
Section 8.3.5
Section 8.3.6
Section 8.3.7
Section 8.5.1
Section 8.5.2
Section 8.5.3
Section 8.5.4
Section 8.5.5
Section 8.6.1
Section 8.6.2

5 Page





PCF85063AT arduino
NXP Semiconductors
PCF85063ATL
Tiny Real-Time Clock/calendar with alarm function and I2C-bus
8.2.2.1 Alarm interrupt
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When AIE bit is disabled, pin INT remains high-impedance.
Fig 7. Interrupt scheme
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AIE: This bit activates or deactivates the generation of an interrupt when AF is asserted,
respectively.
AF: When an alarm occurs, AF is set logic 1. This bit maintains its value until overwritten
by command. To prevent one flag being overwritten while clearing another, a logic AND is
performed during a write access.
8.2.2.2 MI and HMI: minute and half minute interrupt
The minute interrupt (bit MI) and half minute interrupt (bit HMI) are pre-defined timers for
generating interrupt pulses on pin INT; see Figure 8. The timers are running in sync with
the seconds counter (see Table 19 on page 18).
When starting MI, the first interrupt will be generated after 1 second to 59 seconds. When
starting HMI, the first interrupt will be generated after 1 second to 29 seconds.
Subsequent periods do not have such a delay. The timers can be enabled independently
from one another. However, a minute interrupt enabled on top of a half minute interrupt is
not distinguishable.
PCF85063ATL
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 15 April 2013
© NXP B.V. 2013. All rights reserved.
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