pcf2123 NXP Semiconductors, pcf2123 Datasheet - Page 3
pcf2123
Manufacturer Part Number
pcf2123
Description
Spi Real Time Clock/calendar
Manufacturer
NXP Semiconductors
Datasheet
1.PCF2123.pdf
(54 pages)
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NXP Semiconductors
6. Block diagram
PCF2123_1
Product data sheet
Fig 1.
OSCO
TEST
OSCI
SDO
Block diagram of PCF2123
SCL
V
V
SDI
CE
DD
SS
OSCILLATOR
POWER ON
INTERFACE
32.768 kHz
MONITOR
WATCH
RESET
DOG
SPI
PCF2123
DIVIDER
Rev. 01 — 19 November 2008
0D
0E
0A
0B
0C
0F
00
01
02
03
04
05
06
07
08
09
TIMER/CLKOUT CONTROL
OFFSET FUNCTION
ALARM FUNCTION
TIMER FUNCTION
COUNTDOWN TIMER
CONTROL/STATUS 1
CONTROL/STATUS 2
CONTROL
OS/SECONDS
VL/MINUTES
WEEKDAYS
TIME
WEEKDAY
OFFSET
MONTHS
MINUTE
HOURS
YEARS
HOUR
DAYS
DAY
CLOCK OUT
INTERRUPT
SPI Real time clock/calendar
001aah665
PCF2123
© NXP B.V. 2008. All rights reserved.
CLKOE
CLKOUT
INT
3 of 54
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