pcf2128 NXP Semiconductors, pcf2128 Datasheet - Page 3

• Manufacturer Part Number: pcf2128
• Description: Integrated Rtc / Tcxo / Crystal
• Manufacturer: NXP Semiconductors

NXP Semiconductors
5. Block diagram
PCF2128_SDS_0
Preliminary [short] data sheet
Fig 1. Block diagram of PCF2128
CLKOUT
SDA/CE
V
V
SDO
RST
SCL
V
OUT
V
BAT
SDI
IFS
PFI
DD
TS
SS
7
18
20
19
8
16
4
3
2
1
5
6
15
(internal)
SDA/CE
1.25 V
SCL
PFO
BATTERY BACK UP
14
SWITCH-OVER
OSCILLATOR
SELECTORS
SERIAL BUS
INTERFACE
INTERFACE
INTERFACE
CIRCUITRY
MONITOR
I
2
SDA/CE
C BUS
TEMP
32.768 kHz
SDO
SCL
SDI
OSCO
OSCI
Rev. 00.03 — 4 June 2007
TEMPERATURE
internal
power
supply
RESET
STATIC RAM
512 BYTES
SENSOR
TCXO
TEMP
TEST
REGISTER
CONTROL
ADDRESS
DIVIDER
TIMER
LOGIC
13
AND
1 Hz
INT
17
1/16 SECOND TIMESTAMP
CRYSTAL AGING OFFSET
CLOCKOUT CONTROL
SECOND TIMESTAMP
Real time clock / calendar
COUNTDOWN TIMER
MINUTE TIMESTAMP
MONTH TIMESTAMP
RAM ADDRESS MSB
RAM ADDRESS LSB
HOUR TIMESTAMP
WEEKDAY ALARM
YEAR TIMESTAMP
TIMER CONTROL
SECOND ALARM
DAY TIMESTAMP
MINUTE ALARM
HOUR ALARM
CONTROL 1
CONTROL 2
CONTROL 3
WEEKDAYS
DAY ALARM
RAM WRITE
RAM READ
SECONDS
MINUTES
MONTHS
HOURS
YEARS
DAYS
PCF2128
© NXP B.V. 2007. All rights reserved.
001aag059_02
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
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