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PDF PCF85263A Data sheet ( Hoja de datos )
| Número de pieza | PCF85263A | |
| Descripción | Tiny Real-Time Clock/calendar | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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PCF85263A
Tiny Real-Time Clock/calendar with alarm function, battery
switch-over, time stamp input, and I2C-bus
Rev. 2 — 10 July 2014
Product data sheet
1. General description
The PCF85263A is a CMOS1 Real-Time Clock (RTC) and calendar optimized for low
power consumption and with automatic switching to battery on main power loss. The RTC
can also be configured as a stop-watch (elapsed time counter). Three time log registers
triggered from battery switch-over as well as input driven events. Featuring clock output
and two independent interrupt signals, two alarms, I2C interface and quartz crystal
calibration.
For a selection of NXP Real-Time Clocks, see Table 72 on page 90
2. Features and benefits
UL Recognized Component
Provides year, month, day, weekday, hours, minutes, seconds and 100th seconds
based on a 32.768 kHz quartz crystal
Stop-watch mode for elapsed time counting. From 100th seconds to 999999 hours
Two independent alarms
Battery back-up circuit
WatchDog timer
Three timestamp registers
Two independent interrupt generators plus predefined interrupts at every second,
minute, or hour
Frequency adjustment via programmable offset register
Clock operating voltage: 0.9 V to 5.5 V
Low current; typical 0.28 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)
Configurable oscillator circuit for a wide variety of quartzes: CL = 6 pF, CL = 7 pF, and
CL = 12.5 pF
3. Applications
Printers and copiers
Electronic metering
Digital cameras
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 24.
1 page  
NXP Semiconductors
PCF85263A
Tiny RTC with alarm, battery switch-over, and I2C-bus
26&,
26&2
9%$7
76 &/.,17%
966
3&)$77
9''
,17$ &/.
&/.
6&/
6'$
For mechanical details, see Figure 47 on page 82.
Fig 5. Pin configuration for PCF85263ATT1 (TSSOP10)
DDD
PCF85263A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 10 July 2014
© NXP Semiconductors N.V. 2014. All rights reserved.
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8.1.1.2 Stop-watch mode time registers (RTCM = 1)
Table 6. Stop-watch mode time registers
Bit positions labeled as - are not implemented. After reset, all registers are set according to Table 62 on page 59.
Address Register name
Bit
7654321
Stop-watch time registers
00h
100th_seconds
100TH_SECONDS (0 to 99)
01h Seconds
OS SECONDS (0 to 59)
02h Minutes
EMON
MINUTES (0 to 59)
03h Hours_xx_xx_00 HR_XX_XX_00 (0 to 99)
04h Hours_xx_00_xx HR_XX_00_XX (0 to 99)
05h Hours_00_xx_xx HR_00_XX_XX (0 to 99)
06h not used
-------
07h not used
-------
Stop-watch alarm1
08h Second_alm1
-
SEC_ALM1 (0 to 59)
09h Minute_alm1
-
MIN_ALM1 (0 to 59)
0Ah Hr_xx_xx_00_alm1 HR_XX_XX_00_ALM1 (0 to 99)
0Bh Hr_xx_00_xx_alm1 HR_XX_00_XX_ALM1 (0 to 99)
0Ch Hr_00_xx_xx_alm1 HR_00_XX_XX_ALM1 (0 to 99)
Stop-watch alarm2
0Dh Minute_alm2
-
MIN_ALM2 (0 to 59)
0Eh
Hr_xx_00_alm2
HR_XX_00_ALM2 (0 to 99)
0Fh
Hr_00_xx_alm2
HR_00_XX_ALM2 (0 to 99)
Stop-watch alarm enables
10h
Alarm_enables
HR_00_XX HR_XX_00 MIN_A2E HR_00_XX HR_XX_00 HR_XX_XX MIN_A1E
_A2E
_A2E
_XX_A1E _XX_A1E _00_A1E
Reference
0
Section 8.3
-
-
Section 8.4
Section 8.4
SEC_A1E Section 8.4
11 Page | ||
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| PDF Descargar | [ Datasheet PCF85263A.PDF ] | |
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