pcf2128 NXP Semiconductors, pcf2128 Datasheet - Page 6

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

NXP Semiconductors
PCF2128_SDS_0
Preliminary [short] data sheet
Fig 4. Application diagram: timekeeping, power management, CLKOUT, timestamp with the interface active
from PCF2128
V
V
DD
SS
= 2.2 - 5.5 V
INT
RST
PFO
8.1.1 Timekeeping, power management, CLKOUT, timestamp and interface active
8.1 Application example
microcontroller
PCF2128 used for timekeeping, power management, CLKOUT and timestamp functions
(see
Figure
SDO
CE
SCL
SDI
4). The interface is active. V
R
PU
Rev. 00.03 — 4 June 2007
10
8
2
3
4
5
6
7
9
1
SCL
SDI
SDO
SDA / CE
IFS
TS
CLKOUT
V
n.c.
n.c.
SS
PCF2128
out
V
V
V
RST
PFI
PFO
n.c.
n.c.
n.c.
INT
BAT
OUT
DD
supplies an external chip (e.g. SRAM).
20
19
17
16
14
18
15
13
12
11
100 nF
R
PU
SRAM
V
V
SS
DD
Real time clock / calendar
R
R
mgm002_09
1
2
100 nF
to the MCU
PCF2128
© NXP B.V. 2007. All rights reserved.
Batt
100 nF
RST
PFO
INT
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