PCF2128 데이터 시트보기 (PDF) - Philips Electronics

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PCF2128

Integrated RTC / TCXO / Crystal

Philips Electronics 

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

(see Figure 4). The interface is active. Vout supplies an external chip (e.g. SRAM).

VDD = 2.2 - 5.5 V

RPU

microcontroller

SCL

SDI

from PCF2128

SDO

INT

CE

RST

PFO

VSS

mgm002_09

PCF2128

1 SCL

VDD 20

2 SDI

VBAT 19

3 SDO

VOUT 18

4 SDA / CE INT 17

5 IFS

RST 16

6 TS

PFI 15

7 CLKOUT

PFO 14

8 VSS

9 n.c.

10 n.c.

n.c. 13

n.c. 12

n.c. 11 100 nF

RPU

VSS

SRAM

VDD

R1

to the MCU

INT

RST

PFO

100 nF Batt

R2

100 nF

Fig 4. Application diagram: timekeeping, power management, CLKOUT, timestamp with the interface active

PCF2128_SDS_0

Preliminary [short] data sheet

Rev. 00.03 — 4 June 2007

© NXP B.V. 2007. All rights reserved.

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