PCF2128_SDS_0

© NXP B.V. 2007. All rights reserved.

Preliminary [short] data sheet

Rev. 00.03 — 4 June 2007

6 of 10

NXP Semiconductors

PCF2128

Real time clock / calendar

8.1 Application example

8.1.1 Timekeeping, power management, CLKOUT, timestamp and interface active

PCF2128 used for timekeeping, power management, CLKOUT and timestamp functions

Fig 4.

Application diagram: timekeeping, power management, CLKOUT, timestamp with the interface active

mgm002_09

PCF2128

1

2

3

4

5

INT

SDA / CE

V

SS

SCL

SDI

SDO

V

DD

6

7

813

14

15

16

17

18

CLKOUT

19

20

n.c.

RST

V

BAT

IFS

V

OUT

9

10

12

11

n.c.

n.c.

n.c.

n.c.

PFO

TS

PFI

V

SS

V

100 nF

100 nF

microcontroller

SCL

SDI

SDO

CE

R

PU

INT

RST

to the MCU

R

1

R

2

Batt

100 nF

R

PU

PFO

INT

RST

from PCF2128

PFO

SRAM

V

DD

V

SS