PCA8565TS Datasheet PDF - NXP Semiconductors
| Part Number | PCA8565TS | |
| Description | Real time clock/calender | |
| Manufacturers | NXP Semiconductors | |
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PCA8565
Real time clock/calender
Rev. 01 — 31 March 2003
Product data
1. General description
The PCA8565 is a CMOS real time clock/calendar optimized for low power
consumption. A programmable clock output, interrupt output and voltage-low detector
are also provided. All address and data are transferred serially via a two-line
bidirectional I2C-bus. Maximum bus speed is 400 kbit/s. The built-in word address
register is incremented automatically after each written or read data byte.
2. Features
s Provides year, month, day, weekday, hours, minutes and seconds based on
32.768 kHz quartz crystal
s Century flag
s Clock operating voltage: 1.8 to 5.5 V
s Extended operating temperature range: −40 to +125 °C
s Low backup current; typical 0.5 µA at VDD = 3.0 V and Tamb = 25 °C
s 400 kHz two-wire I2C-bus interface (at VDD = 1.8 to 5.5 V)
s Programmable clock output for peripheral devices (32.768 kHz, 1024 Hz,
32 Hz and 1 Hz)
s Alarm and timer functions
s Integrated oscillator capacitor
s Internal power-on reset
s I2C-bus slave address: read A3H and write A2H
s Open-drain interrupt pin.
3. Applications
s Automotive
s Industrial
s Other applications that require a wide operating temperature range.
4. Quick reference data
Table 1:
Symbol
VDD
Quick reference data
Parameter
supply voltage
IDD
Tamb
supply current
ambient temperature
Conditions
I2C-bus active; fSCL = 400 kHz;
Tamb = −40 to +125 °C
fSCL = 400 kHz
Min Typ Max Unit
1.8 -
5.5 V
--
−40 -
820
+125
µA
°C
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Philips Semiconductors
PCA8565
Real time clock/calender
handbook, halfpage
VDD
MGR887
period of battery
operation
normal power
operation
Vlow
Fig 4. Voltage-low detection.
VL set
t
8.6 Register organization
Table 4: Binary formatted registers overview
Bit positions labelled as x are not implemented, those labelled with 0 should always be written with logic 0.
Address Register name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
00H
control/status 1
TEST1 0
STOP 0
TESTC 0
0
01H
control/status 2
0
0
0
TI/TP AF TF AIE
0DH
CLKOUT control
FE
x
x
x
x
x
FD1
0EH timer control TE x x x x x TD1
0FH timer
<timer countdown value>
Bit 0
0
TIE
FD0
TD0
Table 5: BCD formatted registers overview
Bit positions labelled as x are not implemented.
Address Register name
BCD format tens nibble
BCD format units nibble
Bit 7
23
Bit 6
22
Bit 5
21
Bit 4
20
Bit 3
23
Bit 2
22
Bit 1
21
Bit 0
20
02H seconds
VL
<seconds 00 to 59 coded in BCD>
03H minutes
x
<minutes 00 to 59 coded in BCD>
04H hours
xx
<hours 00 to 23 coded in BCD>
05H days
xx
<days 01 to 31 coded in BCD>
06H weekdays
xxxxx
<weekdays 0 to 6>
07H
months/century
C
x
x
<months 01 to 12 coded in BCD>
08H years
<years 00 to 99 coded in BCD>
09H minute alarm AE
<minute alarm 00 to 59 coded in BCD>
0AH hour alarm
AE x
<hour alarm 00 to 23 coded in BCD>
0BH day alarm
AE x
<day alarm 01 to 31 coded in BCD>
0CH
weekday alarm
AE
x
x
x
x
<weekday alarm 0 to 6>
9397 750 10695
Product data
Rev. 01 — 31 March 2003
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
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| Information | Total 26 Pages | |
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| Download | [ PCA8565TS.PDF Datasheet ] | |
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